CVE-2024-26805 (GCVE-0-2024-26805)

Vulnerability from cvelistv5 – Published: 2024-04-04 08:20 – Updated: 2026-05-11 20:04
VLAI?
Title
netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter
Summary
In the Linux kernel, the following vulnerability has been resolved: netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter syzbot reported the following uninit-value access issue [1]: netlink_to_full_skb() creates a new `skb` and puts the `skb->data` passed as a 1st arg of netlink_to_full_skb() onto new `skb`. The data size is specified as `len` and passed to skb_put_data(). This `len` is based on `skb->end` that is not data offset but buffer offset. The `skb->end` contains data and tailroom. Since the tailroom is not initialized when the new `skb` created, KMSAN detects uninitialized memory area when copying the data. This patch resolved this issue by correct the len from `skb->end` to `skb->len`, which is the actual data offset. BUG: KMSAN: kernel-infoleak-after-free in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak-after-free in copy_to_user_iter lib/iov_iter.c:24 [inline] BUG: KMSAN: kernel-infoleak-after-free in iterate_ubuf include/linux/iov_iter.h:29 [inline] BUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance2 include/linux/iov_iter.h:245 [inline] BUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance include/linux/iov_iter.h:271 [inline] BUG: KMSAN: kernel-infoleak-after-free in _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186 instrument_copy_to_user include/linux/instrumented.h:114 [inline] copy_to_user_iter lib/iov_iter.c:24 [inline] iterate_ubuf include/linux/iov_iter.h:29 [inline] iterate_and_advance2 include/linux/iov_iter.h:245 [inline] iterate_and_advance include/linux/iov_iter.h:271 [inline] _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186 copy_to_iter include/linux/uio.h:197 [inline] simple_copy_to_iter+0x68/0xa0 net/core/datagram.c:532 __skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:420 skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546 skb_copy_datagram_msg include/linux/skbuff.h:3960 [inline] packet_recvmsg+0xd9c/0x2000 net/packet/af_packet.c:3482 sock_recvmsg_nosec net/socket.c:1044 [inline] sock_recvmsg net/socket.c:1066 [inline] sock_read_iter+0x467/0x580 net/socket.c:1136 call_read_iter include/linux/fs.h:2014 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x8f6/0xe00 fs/read_write.c:470 ksys_read+0x20f/0x4c0 fs/read_write.c:613 __do_sys_read fs/read_write.c:623 [inline] __se_sys_read fs/read_write.c:621 [inline] __x64_sys_read+0x93/0xd0 fs/read_write.c:621 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit was stored to memory at: skb_put_data include/linux/skbuff.h:2622 [inline] netlink_to_full_skb net/netlink/af_netlink.c:181 [inline] __netlink_deliver_tap_skb net/netlink/af_netlink.c:298 [inline] __netlink_deliver_tap+0x5be/0xc90 net/netlink/af_netlink.c:325 netlink_deliver_tap net/netlink/af_netlink.c:338 [inline] netlink_deliver_tap_kernel net/netlink/af_netlink.c:347 [inline] netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x10f1/0x1250 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [inline] __do_sys_sendmsg net/socket.c:2676 [inline] __se_sys_sendmsg net/socket.c:2674 [inline] __x64_sys_sendmsg+0x307/0x490 net/socket.c:2674 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit was created at: free_pages_prepare mm/page_alloc.c:1087 [inline] free_unref_page_prepare+0xb0/0xa40 mm/page_alloc.c:2347 free_unref_page_list+0xeb/0x1100 mm/page_alloc.c:2533 release_pages+0x23d3/0x2410 mm/swap.c:1042 free_pages_and_swap_cache+0xd9/0xf0 mm/swap_state.c:316 tlb_batch_pages ---truncated---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1853c949646005b5959c483becde86608f548f24 , < ec343a55b687a452f5e87f3b52bf9f155864df65 (git)
Affected: 1853c949646005b5959c483becde86608f548f24 , < 9ae51361da43270f4ba0eb924427a07e87e48777 (git)
Affected: 1853c949646005b5959c483becde86608f548f24 , < f19d1f98e60e68b11fc60839105dd02a30ec0d77 (git)
Affected: 1853c949646005b5959c483becde86608f548f24 , < c71ed29d15b1a1ed6c464f8c3536996963046285 (git)
Affected: 1853c949646005b5959c483becde86608f548f24 , < 0b27bf4c494d61e5663baa34c3edd7ccebf0ea44 (git)
Affected: 1853c949646005b5959c483becde86608f548f24 , < d3ada42e534a83b618bbc1e490d23bf0fdae4736 (git)
Affected: 1853c949646005b5959c483becde86608f548f24 , < 59fc3e3d049e39e7d0d271f20dd5fb47c57faf1d (git)
Affected: 1853c949646005b5959c483becde86608f548f24 , < 661779e1fcafe1b74b3f3fe8e980c1e207fea1fd (git)
Affected: 92994a5f49d0a81c8643452d5c0a6e8b31d85a61 (git)
Affected: 85aec6328f3346b0718211faad564a3ffa64f60e (git)
Affected: d38200098e3203ba30ba06ed3f345ec6ca75234c (git)
Affected: 65d48c630ff80a19c39751a4a6d3315f4c3c0280 (git)
Affected: 62f43b58d2b2c4f0200b9ca2b997f4c484f0272f (git)
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Linux Linux Affected: 4.3
Unaffected: 0 , < 4.3 (semver)
Unaffected: 4.19.309 , ≤ 4.19.* (semver)
Unaffected: 5.4.271 , ≤ 5.4.* (semver)
Unaffected: 5.10.212 , ≤ 5.10.* (semver)
Unaffected: 5.15.151 , ≤ 5.15.* (semver)
Unaffected: 6.1.81 , ≤ 6.1.* (semver)
Unaffected: 6.6.21 , ≤ 6.6.* (semver)
Unaffected: 6.7.9 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetlink: Fix kernel-infoleak-after-free in __skb_datagram_iter\n\nsyzbot reported the following uninit-value access issue [1]:\n\nnetlink_to_full_skb() creates a new `skb` and puts the `skb-\u003edata`\npassed as a 1st arg of netlink_to_full_skb() onto new `skb`. The data\nsize is specified as `len` and passed to skb_put_data(). This `len`\nis based on `skb-\u003eend` that is not data offset but buffer offset. The\n`skb-\u003eend` contains data and tailroom. Since the tailroom is not\ninitialized when the new `skb` created, KMSAN detects uninitialized\nmemory area when copying the data.\n\nThis patch resolved this issue by correct the len from `skb-\u003eend` to\n`skb-\u003elen`, which is the actual data offset.\n\nBUG: KMSAN: kernel-infoleak-after-free in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\nBUG: KMSAN: kernel-infoleak-after-free in copy_to_user_iter lib/iov_iter.c:24 [inline]\nBUG: KMSAN: kernel-infoleak-after-free in iterate_ubuf include/linux/iov_iter.h:29 [inline]\nBUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\nBUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance include/linux/iov_iter.h:271 [inline]\nBUG: KMSAN: kernel-infoleak-after-free in _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186\n instrument_copy_to_user include/linux/instrumented.h:114 [inline]\n copy_to_user_iter lib/iov_iter.c:24 [inline]\n iterate_ubuf include/linux/iov_iter.h:29 [inline]\n iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\n iterate_and_advance include/linux/iov_iter.h:271 [inline]\n _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186\n copy_to_iter include/linux/uio.h:197 [inline]\n simple_copy_to_iter+0x68/0xa0 net/core/datagram.c:532\n __skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:420\n skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546\n skb_copy_datagram_msg include/linux/skbuff.h:3960 [inline]\n packet_recvmsg+0xd9c/0x2000 net/packet/af_packet.c:3482\n sock_recvmsg_nosec net/socket.c:1044 [inline]\n sock_recvmsg net/socket.c:1066 [inline]\n sock_read_iter+0x467/0x580 net/socket.c:1136\n call_read_iter include/linux/fs.h:2014 [inline]\n new_sync_read fs/read_write.c:389 [inline]\n vfs_read+0x8f6/0xe00 fs/read_write.c:470\n ksys_read+0x20f/0x4c0 fs/read_write.c:613\n __do_sys_read fs/read_write.c:623 [inline]\n __se_sys_read fs/read_write.c:621 [inline]\n __x64_sys_read+0x93/0xd0 fs/read_write.c:621\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nUninit was stored to memory at:\n skb_put_data include/linux/skbuff.h:2622 [inline]\n netlink_to_full_skb net/netlink/af_netlink.c:181 [inline]\n __netlink_deliver_tap_skb net/netlink/af_netlink.c:298 [inline]\n __netlink_deliver_tap+0x5be/0xc90 net/netlink/af_netlink.c:325\n netlink_deliver_tap net/netlink/af_netlink.c:338 [inline]\n netlink_deliver_tap_kernel net/netlink/af_netlink.c:347 [inline]\n netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]\n netlink_unicast+0x10f1/0x1250 net/netlink/af_netlink.c:1368\n netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910\n sock_sendmsg_nosec net/socket.c:730 [inline]\n __sock_sendmsg net/socket.c:745 [inline]\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638\n __sys_sendmsg net/socket.c:2667 [inline]\n __do_sys_sendmsg net/socket.c:2676 [inline]\n __se_sys_sendmsg net/socket.c:2674 [inline]\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2674\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\n\nUninit was created at:\n free_pages_prepare mm/page_alloc.c:1087 [inline]\n free_unref_page_prepare+0xb0/0xa40 mm/page_alloc.c:2347\n free_unref_page_list+0xeb/0x1100 mm/page_alloc.c:2533\n release_pages+0x23d3/0x2410 mm/swap.c:1042\n free_pages_and_swap_cache+0xd9/0xf0 mm/swap_state.c:316\n tlb_batch_pages\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:04:30.779Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/ec343a55b687a452f5e87f3b52bf9f155864df65"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ae51361da43270f4ba0eb924427a07e87e48777"
        },
        {
          "url": "https://git.kernel.org/stable/c/f19d1f98e60e68b11fc60839105dd02a30ec0d77"
        },
        {
          "url": "https://git.kernel.org/stable/c/c71ed29d15b1a1ed6c464f8c3536996963046285"
        },
        {
          "url": "https://git.kernel.org/stable/c/0b27bf4c494d61e5663baa34c3edd7ccebf0ea44"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3ada42e534a83b618bbc1e490d23bf0fdae4736"
        },
        {
          "url": "https://git.kernel.org/stable/c/59fc3e3d049e39e7d0d271f20dd5fb47c57faf1d"
        },
        {
          "url": "https://git.kernel.org/stable/c/661779e1fcafe1b74b3f3fe8e980c1e207fea1fd"
        }
      ],
      "title": "netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26805",
    "datePublished": "2024-04-04T08:20:32.250Z",
    "dateReserved": "2024-02-19T14:20:24.179Z",
    "dateUpdated": "2026-05-11T20:04:30.779Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-26805",
      "date": "2026-05-21",
      "epss": "7e-05",
      "percentile": "0.00625"
    },
    "fkie_nvd": {
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetlink: Fix kernel-infoleak-after-free in __skb_datagram_iter\\n\\nsyzbot reported the following uninit-value access issue [1]:\\n\\nnetlink_to_full_skb() creates a new `skb` and puts the `skb-\u003edata`\\npassed as a 1st arg of netlink_to_full_skb() onto new `skb`. The data\\nsize is specified as `len` and passed to skb_put_data(). This `len`\\nis based on `skb-\u003eend` that is not data offset but buffer offset. The\\n`skb-\u003eend` contains data and tailroom. Since the tailroom is not\\ninitialized when the new `skb` created, KMSAN detects uninitialized\\nmemory area when copying the data.\\n\\nThis patch resolved this issue by correct the len from `skb-\u003eend` to\\n`skb-\u003elen`, which is the actual data offset.\\n\\nBUG: KMSAN: kernel-infoleak-after-free in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in copy_to_user_iter lib/iov_iter.c:24 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in iterate_ubuf include/linux/iov_iter.h:29 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance include/linux/iov_iter.h:271 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186\\n instrument_copy_to_user include/linux/instrumented.h:114 [inline]\\n copy_to_user_iter lib/iov_iter.c:24 [inline]\\n iterate_ubuf include/linux/iov_iter.h:29 [inline]\\n iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\\n iterate_and_advance include/linux/iov_iter.h:271 [inline]\\n _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186\\n copy_to_iter include/linux/uio.h:197 [inline]\\n simple_copy_to_iter+0x68/0xa0 net/core/datagram.c:532\\n __skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:420\\n skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546\\n skb_copy_datagram_msg include/linux/skbuff.h:3960 [inline]\\n packet_recvmsg+0xd9c/0x2000 net/packet/af_packet.c:3482\\n sock_recvmsg_nosec net/socket.c:1044 [inline]\\n sock_recvmsg net/socket.c:1066 [inline]\\n sock_read_iter+0x467/0x580 net/socket.c:1136\\n call_read_iter include/linux/fs.h:2014 [inline]\\n new_sync_read fs/read_write.c:389 [inline]\\n vfs_read+0x8f6/0xe00 fs/read_write.c:470\\n ksys_read+0x20f/0x4c0 fs/read_write.c:613\\n __do_sys_read fs/read_write.c:623 [inline]\\n __se_sys_read fs/read_write.c:621 [inline]\\n __x64_sys_read+0x93/0xd0 fs/read_write.c:621\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\\n\\nUninit was stored to memory at:\\n skb_put_data include/linux/skbuff.h:2622 [inline]\\n netlink_to_full_skb net/netlink/af_netlink.c:181 [inline]\\n __netlink_deliver_tap_skb net/netlink/af_netlink.c:298 [inline]\\n __netlink_deliver_tap+0x5be/0xc90 net/netlink/af_netlink.c:325\\n netlink_deliver_tap net/netlink/af_netlink.c:338 [inline]\\n netlink_deliver_tap_kernel net/netlink/af_netlink.c:347 [inline]\\n netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]\\n netlink_unicast+0x10f1/0x1250 net/netlink/af_netlink.c:1368\\n netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910\\n sock_sendmsg_nosec net/socket.c:730 [inline]\\n __sock_sendmsg net/socket.c:745 [inline]\\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584\\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638\\n __sys_sendmsg net/socket.c:2667 [inline]\\n __do_sys_sendmsg net/socket.c:2676 [inline]\\n __se_sys_sendmsg net/socket.c:2674 [inline]\\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2674\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\\n\\nUninit was created at:\\n free_pages_prepare mm/page_alloc.c:1087 [inline]\\n free_unref_page_prepare+0xb0/0xa40 mm/page_alloc.c:2347\\n free_unref_page_list+0xeb/0x1100 mm/page_alloc.c:2533\\n release_pages+0x23d3/0x2410 mm/swap.c:1042\\n free_pages_and_swap_cache+0xd9/0xf0 mm/swap_state.c:316\\n tlb_batch_pages\\n---truncated---\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se resolvi\\u00f3 la siguiente vulnerabilidad: netlink: Fix kernel-infoleak-after-free en __skb_datagram_iter syzbot inform\\u00f3 el siguiente problema de acceso al valor uninit [1]: netlink_to_full_skb() crea un nuevo `skb` y coloca el ` skb-\u0026gt;data` pas\\u00f3 como primer argumento de netlink_to_full_skb() al nuevo `skb`. El tama\\u00f1o de los datos se especifica como `len` y se pasa a skb_put_data(). Este `len` se basa en `skb-\u0026gt;end` que no es un desplazamiento de datos sino un desplazamiento del b\\u00fafer. El `skb-\u0026gt;end` contiene datos y espacio de adaptaci\\u00f3n. Dado que el tailroom no se inicializa cuando se crea el nuevo `skb`, KMSAN detecta un \\u00e1rea de memoria no inicializada al copiar los datos. Este parche resolvi\\u00f3 este problema corrigiendo la longitud de `skb-\u0026gt;end` a `skb-\u0026gt;len`, que es el desplazamiento de datos real. ERROR: KMSAN: kernel-infoleak-after-free en instrument_copy_to_user include/linux/instrumented.h:114 [en l\\u00ednea] ERROR: KMSAN: kernel-infoleak-after-free en copy_to_user_iter lib/iov_iter.c:24 [en l\\u00ednea] ERROR: KMSAN: kernel-infoleak-after-free en iterate_ubuf include/linux/iov_iter.h:29 [en l\\u00ednea] ERROR: KMSAN: kernel-infoleak-after-free en iterate_and_advance2 include/linux/iov_iter.h:245 [en l\\u00ednea] ERROR: KMSAN: kernel-infoleak-after-free en iterate_and_advance include/linux/iov_iter.h:271 [en l\\u00ednea] ERROR: KMSAN: kernel-infoleak-after-free en _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186 instrument_copy_to_user include/ linux/instrumented.h:114 [en l\\u00ednea] copy_to_user_iter lib/iov_iter.c:24 [en l\\u00ednea] iterate_ubuf include/linux/iov_iter.h:29 [en l\\u00ednea] iterate_and_advance2 include/linux/iov_iter.h:245 [en l\\u00ednea] iterate_and_advance include/ linux/iov_iter.h:271 [en l\\u00ednea] _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186 copy_to_iter include/linux/uio.h:197 [en l\\u00ednea] simple_copy_to_iter+0x68/0xa0 net/core/datagram.c:532 __skb_datagram_iter +0x123/0xdc0 net/core/datagram.c:420 skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546 skb_copy_datagram_msg include/linux/skbuff.h:3960 [en l\\u00ednea] paquete_recvmsg+0xd9c/0x2000 net/packet/af_packet .c:3482 sock_recvmsg_nosec net/socket.c:1044 [en l\\u00ednea] sock_recvmsg net/socket.c:1066 [en l\\u00ednea] sock_read_iter+0x467/0x580 net/socket.c:1136 call_read_iter include/linux/fs.h:2014 [en l\\u00ednea ] new_sync_read fs/read_write.c:389 [en l\\u00ednea] vfs_read+0x8f6/0xe00 fs/read_write.c:470 ksys_read+0x20f/0x4c0 fs/read_write.c:613 __do_sys_read fs/read_write.c:623 [en l\\u00ednea] __se_sys_read fs/ read_write.c:621 [en l\\u00ednea] __x64_sys_read+0x93/0xd0 fs/read_write.c:621 do_syscall_x64 arch/x86/entry/common.c:52 [en l\\u00ednea] do_syscall_64+0x44/0x110 arch/x86/entry/common.c: 83 Entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit se almacen\\u00f3 en la memoria en: skb_put_data include/linux/skbuff.h:2622 [en l\\u00ednea] netlink_to_full_skb net/netlink/af_netlink.c:181 [en l\\u00ednea] __netlink_deliver_tap_skb net/netlink/af_netlink.c:298 [ en l\\u00ednea] __netlink_deliver_tap+0x5be/0xc90 net/netlink/af_netlink.c:325 netlink_deliver_tap net/netlink/af_netlink.c:338 [en l\\u00ednea] netlink_deliver_tap_kernel net/netlink/af_netlink.c:347 [en l\\u00ednea] netlink_unicast_kernel net/netlink/af_netlink.c :1341 [en l\\u00ednea] netlink_unicast+0x10f1/0x1250 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [en l\\u00ednea] __sock_sendmsg net/socket.c :745 [en l\\u00ednea] ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [en l\\u00ednea] __do_sys_sendmsg net/socket.c:267 6 [en l\\u00ednea ] __se_sys_sendmsg net/socket.c:2674 [en l\\u00ednea] __x64_sys_sendmsg+0x307/0x490 net/socket.c:2674 do_syscall_x64 arch/x86/entry/common.c:52 [en l\\u00ednea] do_syscall_64+0x44/0x110 arch/x86/ entrada/ common.c:83 Entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit se cre\\u00f3 en: free_pages_prepare mm/page_alloc.c:1087 [en l\\u00ednea] free_unref_page_prepare+0xb0/0xa40 mm/page_alloc.c:2347 ---truncado---\"}]",
      "id": "CVE-2024-26805",
      "lastModified": "2024-11-21T09:03:06.857",
      "published": "2024-04-04T09:15:09.277",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/0b27bf4c494d61e5663baa34c3edd7ccebf0ea44\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/59fc3e3d049e39e7d0d271f20dd5fb47c57faf1d\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/661779e1fcafe1b74b3f3fe8e980c1e207fea1fd\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/9ae51361da43270f4ba0eb924427a07e87e48777\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/c71ed29d15b1a1ed6c464f8c3536996963046285\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/d3ada42e534a83b618bbc1e490d23bf0fdae4736\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/ec343a55b687a452f5e87f3b52bf9f155864df65\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/f19d1f98e60e68b11fc60839105dd02a30ec0d77\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/0b27bf4c494d61e5663baa34c3edd7ccebf0ea44\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/59fc3e3d049e39e7d0d271f20dd5fb47c57faf1d\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/661779e1fcafe1b74b3f3fe8e980c1e207fea1fd\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/9ae51361da43270f4ba0eb924427a07e87e48777\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/c71ed29d15b1a1ed6c464f8c3536996963046285\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/d3ada42e534a83b618bbc1e490d23bf0fdae4736\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/ec343a55b687a452f5e87f3b52bf9f155864df65\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/f19d1f98e60e68b11fc60839105dd02a30ec0d77\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26805\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-04T09:15:09.277\",\"lastModified\":\"2025-02-27T14:36:02.417\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetlink: Fix kernel-infoleak-after-free in __skb_datagram_iter\\n\\nsyzbot reported the following uninit-value access issue [1]:\\n\\nnetlink_to_full_skb() creates a new `skb` and puts the `skb-\u003edata`\\npassed as a 1st arg of netlink_to_full_skb() onto new `skb`. The data\\nsize is specified as `len` and passed to skb_put_data(). This `len`\\nis based on `skb-\u003eend` that is not data offset but buffer offset. The\\n`skb-\u003eend` contains data and tailroom. Since the tailroom is not\\ninitialized when the new `skb` created, KMSAN detects uninitialized\\nmemory area when copying the data.\\n\\nThis patch resolved this issue by correct the len from `skb-\u003eend` to\\n`skb-\u003elen`, which is the actual data offset.\\n\\nBUG: KMSAN: kernel-infoleak-after-free in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in copy_to_user_iter lib/iov_iter.c:24 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in iterate_ubuf include/linux/iov_iter.h:29 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance include/linux/iov_iter.h:271 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186\\n instrument_copy_to_user include/linux/instrumented.h:114 [inline]\\n copy_to_user_iter lib/iov_iter.c:24 [inline]\\n iterate_ubuf include/linux/iov_iter.h:29 [inline]\\n iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\\n iterate_and_advance include/linux/iov_iter.h:271 [inline]\\n _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186\\n copy_to_iter include/linux/uio.h:197 [inline]\\n simple_copy_to_iter+0x68/0xa0 net/core/datagram.c:532\\n __skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:420\\n skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546\\n skb_copy_datagram_msg include/linux/skbuff.h:3960 [inline]\\n packet_recvmsg+0xd9c/0x2000 net/packet/af_packet.c:3482\\n sock_recvmsg_nosec net/socket.c:1044 [inline]\\n sock_recvmsg net/socket.c:1066 [inline]\\n sock_read_iter+0x467/0x580 net/socket.c:1136\\n call_read_iter include/linux/fs.h:2014 [inline]\\n new_sync_read fs/read_write.c:389 [inline]\\n vfs_read+0x8f6/0xe00 fs/read_write.c:470\\n ksys_read+0x20f/0x4c0 fs/read_write.c:613\\n __do_sys_read fs/read_write.c:623 [inline]\\n __se_sys_read fs/read_write.c:621 [inline]\\n __x64_sys_read+0x93/0xd0 fs/read_write.c:621\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\\n\\nUninit was stored to memory at:\\n skb_put_data include/linux/skbuff.h:2622 [inline]\\n netlink_to_full_skb net/netlink/af_netlink.c:181 [inline]\\n __netlink_deliver_tap_skb net/netlink/af_netlink.c:298 [inline]\\n __netlink_deliver_tap+0x5be/0xc90 net/netlink/af_netlink.c:325\\n netlink_deliver_tap net/netlink/af_netlink.c:338 [inline]\\n netlink_deliver_tap_kernel net/netlink/af_netlink.c:347 [inline]\\n netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]\\n netlink_unicast+0x10f1/0x1250 net/netlink/af_netlink.c:1368\\n netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910\\n sock_sendmsg_nosec net/socket.c:730 [inline]\\n __sock_sendmsg net/socket.c:745 [inline]\\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584\\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638\\n __sys_sendmsg net/socket.c:2667 [inline]\\n __do_sys_sendmsg net/socket.c:2676 [inline]\\n __se_sys_sendmsg net/socket.c:2674 [inline]\\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2674\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\\n\\nUninit was created at:\\n free_pages_prepare mm/page_alloc.c:1087 [inline]\\n free_unref_page_prepare+0xb0/0xa40 mm/page_alloc.c:2347\\n free_unref_page_list+0xeb/0x1100 mm/page_alloc.c:2533\\n release_pages+0x23d3/0x2410 mm/swap.c:1042\\n free_pages_and_swap_cache+0xd9/0xf0 mm/swap_state.c:316\\n tlb_batch_pages\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: netlink: Fix kernel-infoleak-after-free en __skb_datagram_iter syzbot inform\u00f3 el siguiente problema de acceso al valor uninit [1]: netlink_to_full_skb() crea un nuevo `skb` y coloca el ` skb-\u0026gt;data` pas\u00f3 como primer argumento de netlink_to_full_skb() al nuevo `skb`. El tama\u00f1o de los datos se especifica como `len` y se pasa a skb_put_data(). Este `len` se basa en `skb-\u0026gt;end` que no es un desplazamiento de datos sino un desplazamiento del b\u00fafer. El `skb-\u0026gt;end` contiene datos y espacio de adaptaci\u00f3n. Dado que el tailroom no se inicializa cuando se crea el nuevo `skb`, KMSAN detecta un \u00e1rea de memoria no inicializada al copiar los datos. Este parche resolvi\u00f3 este problema corrigiendo la longitud de `skb-\u0026gt;end` a `skb-\u0026gt;len`, que es el desplazamiento de datos real. ERROR: KMSAN: kernel-infoleak-after-free en instrument_copy_to_user include/linux/instrumented.h:114 [en l\u00ednea] ERROR: KMSAN: kernel-infoleak-after-free en copy_to_user_iter lib/iov_iter.c:24 [en l\u00ednea] ERROR: KMSAN: kernel-infoleak-after-free en iterate_ubuf include/linux/iov_iter.h:29 [en l\u00ednea] ERROR: KMSAN: kernel-infoleak-after-free en iterate_and_advance2 include/linux/iov_iter.h:245 [en l\u00ednea] ERROR: KMSAN: kernel-infoleak-after-free en iterate_and_advance include/linux/iov_iter.h:271 [en l\u00ednea] ERROR: KMSAN: kernel-infoleak-after-free en _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186 instrument_copy_to_user include/ linux/instrumented.h:114 [en l\u00ednea] copy_to_user_iter lib/iov_iter.c:24 [en l\u00ednea] iterate_ubuf include/linux/iov_iter.h:29 [en l\u00ednea] iterate_and_advance2 include/linux/iov_iter.h:245 [en l\u00ednea] iterate_and_advance include/ linux/iov_iter.h:271 [en l\u00ednea] _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186 copy_to_iter include/linux/uio.h:197 [en l\u00ednea] simple_copy_to_iter+0x68/0xa0 net/core/datagram.c:532 __skb_datagram_iter +0x123/0xdc0 net/core/datagram.c:420 skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546 skb_copy_datagram_msg include/linux/skbuff.h:3960 [en l\u00ednea] paquete_recvmsg+0xd9c/0x2000 net/packet/af_packet .c:3482 sock_recvmsg_nosec net/socket.c:1044 [en l\u00ednea] sock_recvmsg net/socket.c:1066 [en l\u00ednea] sock_read_iter+0x467/0x580 net/socket.c:1136 call_read_iter include/linux/fs.h:2014 [en l\u00ednea ] new_sync_read fs/read_write.c:389 [en l\u00ednea] vfs_read+0x8f6/0xe00 fs/read_write.c:470 ksys_read+0x20f/0x4c0 fs/read_write.c:613 __do_sys_read fs/read_write.c:623 [en l\u00ednea] __se_sys_read fs/ read_write.c:621 [en l\u00ednea] __x64_sys_read+0x93/0xd0 fs/read_write.c:621 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0x44/0x110 arch/x86/entry/common.c: 83 Entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit se almacen\u00f3 en la memoria en: skb_put_data include/linux/skbuff.h:2622 [en l\u00ednea] netlink_to_full_skb net/netlink/af_netlink.c:181 [en l\u00ednea] __netlink_deliver_tap_skb net/netlink/af_netlink.c:298 [ en l\u00ednea] __netlink_deliver_tap+0x5be/0xc90 net/netlink/af_netlink.c:325 netlink_deliver_tap net/netlink/af_netlink.c:338 [en l\u00ednea] netlink_deliver_tap_kernel net/netlink/af_netlink.c:347 [en l\u00ednea] netlink_unicast_kernel net/netlink/af_netlink.c :1341 [en l\u00ednea] netlink_unicast+0x10f1/0x1250 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [en l\u00ednea] __sock_sendmsg net/socket.c :745 [en l\u00ednea] ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584 ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638 __sys_sendmsg net/socket.c:2667 [en l\u00ednea] __do_sys_sendmsg net/socket.c:267 6 [en l\u00ednea ] __se_sys_sendmsg net/socket.c:2674 [en l\u00ednea] __x64_sys_sendmsg+0x307/0x490 net/socket.c:2674 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0x44/0x110 arch/x86/ entrada/ common.c:83 Entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit se cre\u00f3 en: free_pages_prepare mm/page_alloc.c:1087 [en l\u00ednea] free_unref_page_prepare+0xb0/0xa40 mm/page_alloc.c:2347 ---truncado---\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-908\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.12.49\",\"versionEndExcluding\":\"3.13\",\"matchCriteriaId\":\"E3FB0A4C-A480-4167-9E8B-E25DA07010DC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.14.54\",\"versionEndExcluding\":\"3.15\",\"matchCriteriaId\":\"DC114028-1F95-4659-B03C-439E9DBBE9F1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.18.23\",\"versionEndExcluding\":\"3.19\",\"matchCriteriaId\":\"DFEB996F-37AA-4FE9-9E1E-7158BD2B7CA9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.1.10\",\"versionEndExcluding\":\"4.2\",\"matchCriteriaId\":\"3B568F4B-8057-4D69-9552-BE2DFAC4F975\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.2.3\",\"versionEndExcluding\":\"4.19.309\",\"matchCriteriaId\":\"5EC96BB4-056D-4926-9E34-B6DEA728F78B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.271\",\"matchCriteriaId\":\"7BE17E30-58A5-468C-A06E-28C355F4F8DD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.212\",\"matchCriteriaId\":\"01B34738-A022-44A9-9250-DCBC76539CB9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.151\",\"matchCriteriaId\":\"EEAFD33E-C22F-4FB1-A417-9C96AB3E0358\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.81\",\"matchCriteriaId\":\"EC825B0E-DFCA-4034-9B92-F111A4E2A732\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.21\",\"matchCriteriaId\":\"B19074A2-9FE5-4E7D-9E2D-020F95013ADA\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.7.9\",\"matchCriteriaId\":\"1C538467-EDA0-4A9A-82EB-2925DE9FF827\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B9F4EA73-0894-400F-A490-3A397AB7A517\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"056BD938-0A27-4569-B391-30578B309EE3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F02056A5-B362-4370-9FF8-6F0BD384D520\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"62075ACE-B2A0-4B16-829D-B3DA5AE5CC41\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"A780F817-2A77-4130-A9B7-5C25606314E3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"AEB9199B-AB8F-4877-8964-E2BA95B5F15C\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0b27bf4c494d61e5663baa34c3edd7ccebf0ea44\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/59fc3e3d049e39e7d0d271f20dd5fb47c57faf1d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/661779e1fcafe1b74b3f3fe8e980c1e207fea1fd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9ae51361da43270f4ba0eb924427a07e87e48777\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c71ed29d15b1a1ed6c464f8c3536996963046285\",\"source\":\"416baaa9-dc9f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{\"title\": \"netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"1853c949646005b5959c483becde86608f548f24\", \"lessThan\": \"ec343a55b687a452f5e87f3b52bf9f155864df65\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1853c949646005b5959c483becde86608f548f24\", \"lessThan\": \"9ae51361da43270f4ba0eb924427a07e87e48777\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1853c949646005b5959c483becde86608f548f24\", \"lessThan\": \"f19d1f98e60e68b11fc60839105dd02a30ec0d77\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1853c949646005b5959c483becde86608f548f24\", \"lessThan\": \"c71ed29d15b1a1ed6c464f8c3536996963046285\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1853c949646005b5959c483becde86608f548f24\", \"lessThan\": \"0b27bf4c494d61e5663baa34c3edd7ccebf0ea44\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1853c949646005b5959c483becde86608f548f24\", \"lessThan\": \"d3ada42e534a83b618bbc1e490d23bf0fdae4736\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1853c949646005b5959c483becde86608f548f24\", \"lessThan\": \"59fc3e3d049e39e7d0d271f20dd5fb47c57faf1d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1853c949646005b5959c483becde86608f548f24\", \"lessThan\": \"661779e1fcafe1b74b3f3fe8e980c1e207fea1fd\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"92994a5f49d0a81c8643452d5c0a6e8b31d85a61\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"85aec6328f3346b0718211faad564a3ffa64f60e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d38200098e3203ba30ba06ed3f345ec6ca75234c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"65d48c630ff80a19c39751a4a6d3315f4c3c0280\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"62f43b58d2b2c4f0200b9ca2b997f4c484f0272f\", \"versionType\": \"git\"}], \"programFiles\": [\"net/netlink/af_netlink.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.3\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.3\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.309\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.271\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.212\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.151\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.81\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.21\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.7.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/netlink/af_netlink.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/ec343a55b687a452f5e87f3b52bf9f155864df65\"}, {\"url\": \"https://git.kernel.org/stable/c/9ae51361da43270f4ba0eb924427a07e87e48777\"}, {\"url\": \"https://git.kernel.org/stable/c/f19d1f98e60e68b11fc60839105dd02a30ec0d77\"}, {\"url\": \"https://git.kernel.org/stable/c/c71ed29d15b1a1ed6c464f8c3536996963046285\"}, {\"url\": \"https://git.kernel.org/stable/c/0b27bf4c494d61e5663baa34c3edd7ccebf0ea44\"}, {\"url\": \"https://git.kernel.org/stable/c/d3ada42e534a83b618bbc1e490d23bf0fdae4736\"}, {\"url\": \"https://git.kernel.org/stable/c/59fc3e3d049e39e7d0d271f20dd5fb47c57faf1d\"}, {\"url\": \"https://git.kernel.org/stable/c/661779e1fcafe1b74b3f3fe8e980c1e207fea1fd\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetlink: Fix kernel-infoleak-after-free in __skb_datagram_iter\\n\\nsyzbot reported the following uninit-value access issue [1]:\\n\\nnetlink_to_full_skb() creates a new `skb` and puts the `skb-\u003edata`\\npassed as a 1st arg of netlink_to_full_skb() onto new `skb`. The data\\nsize is specified as `len` and passed to skb_put_data(). This `len`\\nis based on `skb-\u003eend` that is not data offset but buffer offset. The\\n`skb-\u003eend` contains data and tailroom. Since the tailroom is not\\ninitialized when the new `skb` created, KMSAN detects uninitialized\\nmemory area when copying the data.\\n\\nThis patch resolved this issue by correct the len from `skb-\u003eend` to\\n`skb-\u003elen`, which is the actual data offset.\\n\\nBUG: KMSAN: kernel-infoleak-after-free in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in copy_to_user_iter lib/iov_iter.c:24 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in iterate_ubuf include/linux/iov_iter.h:29 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance include/linux/iov_iter.h:271 [inline]\\nBUG: KMSAN: kernel-infoleak-after-free in _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186\\n instrument_copy_to_user include/linux/instrumented.h:114 [inline]\\n copy_to_user_iter lib/iov_iter.c:24 [inline]\\n iterate_ubuf include/linux/iov_iter.h:29 [inline]\\n iterate_and_advance2 include/linux/iov_iter.h:245 [inline]\\n iterate_and_advance include/linux/iov_iter.h:271 [inline]\\n _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186\\n copy_to_iter include/linux/uio.h:197 [inline]\\n simple_copy_to_iter+0x68/0xa0 net/core/datagram.c:532\\n __skb_datagram_iter+0x123/0xdc0 net/core/datagram.c:420\\n skb_copy_datagram_iter+0x5c/0x200 net/core/datagram.c:546\\n skb_copy_datagram_msg include/linux/skbuff.h:3960 [inline]\\n packet_recvmsg+0xd9c/0x2000 net/packet/af_packet.c:3482\\n sock_recvmsg_nosec net/socket.c:1044 [inline]\\n sock_recvmsg net/socket.c:1066 [inline]\\n sock_read_iter+0x467/0x580 net/socket.c:1136\\n call_read_iter include/linux/fs.h:2014 [inline]\\n new_sync_read fs/read_write.c:389 [inline]\\n vfs_read+0x8f6/0xe00 fs/read_write.c:470\\n ksys_read+0x20f/0x4c0 fs/read_write.c:613\\n __do_sys_read fs/read_write.c:623 [inline]\\n __se_sys_read fs/read_write.c:621 [inline]\\n __x64_sys_read+0x93/0xd0 fs/read_write.c:621\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\\n\\nUninit was stored to memory at:\\n skb_put_data include/linux/skbuff.h:2622 [inline]\\n netlink_to_full_skb net/netlink/af_netlink.c:181 [inline]\\n __netlink_deliver_tap_skb net/netlink/af_netlink.c:298 [inline]\\n __netlink_deliver_tap+0x5be/0xc90 net/netlink/af_netlink.c:325\\n netlink_deliver_tap net/netlink/af_netlink.c:338 [inline]\\n netlink_deliver_tap_kernel net/netlink/af_netlink.c:347 [inline]\\n netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]\\n netlink_unicast+0x10f1/0x1250 net/netlink/af_netlink.c:1368\\n netlink_sendmsg+0x1238/0x13d0 net/netlink/af_netlink.c:1910\\n sock_sendmsg_nosec net/socket.c:730 [inline]\\n __sock_sendmsg net/socket.c:745 [inline]\\n ____sys_sendmsg+0x9c2/0xd60 net/socket.c:2584\\n ___sys_sendmsg+0x28d/0x3c0 net/socket.c:2638\\n __sys_sendmsg net/socket.c:2667 [inline]\\n __do_sys_sendmsg net/socket.c:2676 [inline]\\n __se_sys_sendmsg net/socket.c:2674 [inline]\\n __x64_sys_sendmsg+0x307/0x490 net/socket.c:2674\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x63/0x6b\\n\\nUninit was created at:\\n free_pages_prepare mm/page_alloc.c:1087 [inline]\\n free_unref_page_prepare+0xb0/0xa40 mm/page_alloc.c:2347\\n free_unref_page_list+0xeb/0x1100 mm/page_alloc.c:2533\\n release_pages+0x23d3/0x2410 mm/swap.c:1042\\n free_pages_and_swap_cache+0xd9/0xf0 mm/swap_state.c:316\\n tlb_batch_pages\\n---truncated---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.309\", \"versionStartIncluding\": \"4.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.271\", \"versionStartIncluding\": \"4.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.212\", \"versionStartIncluding\": \"4.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.151\", \"versionStartIncluding\": \"4.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.81\", \"versionStartIncluding\": \"4.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.21\", \"versionStartIncluding\": \"4.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.9\", \"versionStartIncluding\": \"4.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"4.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.12.49\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.14.54\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.18.23\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.1.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.2.3\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:04:30.779Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26805\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:04:30.779Z\", \"dateReserved\": \"2024-02-19T14:20:24.179Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-04T08:20:32.250Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.