CVE-2022-50265 (GCVE-0-2022-50265)
Vulnerability from cvelistv5
Published
2025-09-15 14:21
Modified
2025-09-15 14:21
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: kcm: annotate data-races around kcm->rx_wait kcm->rx_psock can be read locklessly in kcm_rfree(). Annotate the read and writes accordingly. syzbot reported: BUG: KCSAN: data-race in kcm_rcv_strparser / kcm_rfree write to 0xffff88810784e3d0 of 1 bytes by task 1823 on cpu 1: reserve_rx_kcm net/kcm/kcmsock.c:283 [inline] kcm_rcv_strparser+0x250/0x3a0 net/kcm/kcmsock.c:363 __strp_recv+0x64c/0xd20 net/strparser/strparser.c:301 strp_recv+0x6d/0x80 net/strparser/strparser.c:335 tcp_read_sock+0x13e/0x5a0 net/ipv4/tcp.c:1703 strp_read_sock net/strparser/strparser.c:358 [inline] do_strp_work net/strparser/strparser.c:406 [inline] strp_work+0xe8/0x180 net/strparser/strparser.c:415 process_one_work+0x3d3/0x720 kernel/workqueue.c:2289 worker_thread+0x618/0xa70 kernel/workqueue.c:2436 kthread+0x1a9/0x1e0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 read to 0xffff88810784e3d0 of 1 bytes by task 17869 on cpu 0: kcm_rfree+0x121/0x220 net/kcm/kcmsock.c:181 skb_release_head_state+0x8e/0x160 net/core/skbuff.c:841 skb_release_all net/core/skbuff.c:852 [inline] __kfree_skb net/core/skbuff.c:868 [inline] kfree_skb_reason+0x5c/0x260 net/core/skbuff.c:891 kfree_skb include/linux/skbuff.h:1216 [inline] kcm_recvmsg+0x226/0x2b0 net/kcm/kcmsock.c:1161 ____sys_recvmsg+0x16c/0x2e0 ___sys_recvmsg net/socket.c:2743 [inline] do_recvmmsg+0x2f1/0x710 net/socket.c:2837 __sys_recvmmsg net/socket.c:2916 [inline] __do_sys_recvmmsg net/socket.c:2939 [inline] __se_sys_recvmmsg net/socket.c:2932 [inline] __x64_sys_recvmmsg+0xde/0x160 net/socket.c:2932 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x01 -> 0x00 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 17869 Comm: syz-executor.2 Not tainted 6.1.0-rc1-syzkaller-00010-gbb1a1146467a-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0c745b5141a45a076f1cb9772a399f7ebcb0948a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2733fb2ad5bfbe6538f2f93a21f2504e3dba9d6a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/62086d1c4602e4f2ec07b975165afc2ed0ff1be9
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/663682cd3192dd4f3547b7890a4391c72441001d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9ae47f11493509cde707af8ecc7eee04c8b8e635
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dbc3a0b917c4f75292b1c0819c188e40fd3c8924
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e2a28807b1ceaa309164b92c38d73d12feea33df
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f1f7122bb2ef056afc6f91ce4c35ab6df1207c8d
Impacted products
Vendor Product Version
Linux Linux Version: ab7ac4eb9832e32a09f4e8042705484d2fb0aad3
Version: ab7ac4eb9832e32a09f4e8042705484d2fb0aad3
Version: ab7ac4eb9832e32a09f4e8042705484d2fb0aad3
Version: ab7ac4eb9832e32a09f4e8042705484d2fb0aad3
Version: ab7ac4eb9832e32a09f4e8042705484d2fb0aad3
Version: ab7ac4eb9832e32a09f4e8042705484d2fb0aad3
Version: ab7ac4eb9832e32a09f4e8042705484d2fb0aad3
Version: ab7ac4eb9832e32a09f4e8042705484d2fb0aad3
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   Linux Linux Version: 4.6
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/kcm/kcmsock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.6"
            },
            {
              "lessThan": "4.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "4.9.332",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.298",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.264",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.223",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.153",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.77",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.332",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.298",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "4.19.264",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "5.4.223",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
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                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "4.6",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkcm: annotate data-races around kcm-\u003erx_wait\n\nkcm-\u003erx_psock can be read locklessly in kcm_rfree().\nAnnotate the read and writes accordingly.\n\nsyzbot reported:\n\nBUG: KCSAN: data-race in kcm_rcv_strparser / kcm_rfree\n\nwrite to 0xffff88810784e3d0 of 1 bytes by task 1823 on cpu 1:\nreserve_rx_kcm net/kcm/kcmsock.c:283 [inline]\nkcm_rcv_strparser+0x250/0x3a0 net/kcm/kcmsock.c:363\n__strp_recv+0x64c/0xd20 net/strparser/strparser.c:301\nstrp_recv+0x6d/0x80 net/strparser/strparser.c:335\ntcp_read_sock+0x13e/0x5a0 net/ipv4/tcp.c:1703\nstrp_read_sock net/strparser/strparser.c:358 [inline]\ndo_strp_work net/strparser/strparser.c:406 [inline]\nstrp_work+0xe8/0x180 net/strparser/strparser.c:415\nprocess_one_work+0x3d3/0x720 kernel/workqueue.c:2289\nworker_thread+0x618/0xa70 kernel/workqueue.c:2436\nkthread+0x1a9/0x1e0 kernel/kthread.c:376\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n\nread to 0xffff88810784e3d0 of 1 bytes by task 17869 on cpu 0:\nkcm_rfree+0x121/0x220 net/kcm/kcmsock.c:181\nskb_release_head_state+0x8e/0x160 net/core/skbuff.c:841\nskb_release_all net/core/skbuff.c:852 [inline]\n__kfree_skb net/core/skbuff.c:868 [inline]\nkfree_skb_reason+0x5c/0x260 net/core/skbuff.c:891\nkfree_skb include/linux/skbuff.h:1216 [inline]\nkcm_recvmsg+0x226/0x2b0 net/kcm/kcmsock.c:1161\n____sys_recvmsg+0x16c/0x2e0\n___sys_recvmsg net/socket.c:2743 [inline]\ndo_recvmmsg+0x2f1/0x710 net/socket.c:2837\n__sys_recvmmsg net/socket.c:2916 [inline]\n__do_sys_recvmmsg net/socket.c:2939 [inline]\n__se_sys_recvmmsg net/socket.c:2932 [inline]\n__x64_sys_recvmmsg+0xde/0x160 net/socket.c:2932\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\ndo_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nvalue changed: 0x01 -\u003e 0x00\n\nReported by Kernel Concurrency Sanitizer on:\nCPU: 0 PID: 17869 Comm: syz-executor.2 Not tainted 6.1.0-rc1-syzkaller-00010-gbb1a1146467a-dirty #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-15T14:21:01.380Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/dbc3a0b917c4f75292b1c0819c188e40fd3c8924"
        },
        {
          "url": "https://git.kernel.org/stable/c/9ae47f11493509cde707af8ecc7eee04c8b8e635"
        },
        {
          "url": "https://git.kernel.org/stable/c/f1f7122bb2ef056afc6f91ce4c35ab6df1207c8d"
        },
        {
          "url": "https://git.kernel.org/stable/c/663682cd3192dd4f3547b7890a4391c72441001d"
        },
        {
          "url": "https://git.kernel.org/stable/c/e2a28807b1ceaa309164b92c38d73d12feea33df"
        },
        {
          "url": "https://git.kernel.org/stable/c/62086d1c4602e4f2ec07b975165afc2ed0ff1be9"
        },
        {
          "url": "https://git.kernel.org/stable/c/2733fb2ad5bfbe6538f2f93a21f2504e3dba9d6a"
        },
        {
          "url": "https://git.kernel.org/stable/c/0c745b5141a45a076f1cb9772a399f7ebcb0948a"
        }
      ],
      "title": "kcm: annotate data-races around kcm-\u003erx_wait",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50265",
    "datePublished": "2025-09-15T14:21:01.380Z",
    "dateReserved": "2025-09-15T13:58:00.974Z",
    "dateUpdated": "2025-09-15T14:21:01.380Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50265\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-15T15:15:37.220\",\"lastModified\":\"2025-09-15T15:22:27.090\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nkcm: annotate data-races around kcm-\u003erx_wait\\n\\nkcm-\u003erx_psock can be read locklessly in kcm_rfree().\\nAnnotate the read and writes accordingly.\\n\\nsyzbot reported:\\n\\nBUG: KCSAN: data-race in kcm_rcv_strparser / kcm_rfree\\n\\nwrite to 0xffff88810784e3d0 of 1 bytes by task 1823 on cpu 1:\\nreserve_rx_kcm net/kcm/kcmsock.c:283 [inline]\\nkcm_rcv_strparser+0x250/0x3a0 net/kcm/kcmsock.c:363\\n__strp_recv+0x64c/0xd20 net/strparser/strparser.c:301\\nstrp_recv+0x6d/0x80 net/strparser/strparser.c:335\\ntcp_read_sock+0x13e/0x5a0 net/ipv4/tcp.c:1703\\nstrp_read_sock net/strparser/strparser.c:358 [inline]\\ndo_strp_work net/strparser/strparser.c:406 [inline]\\nstrp_work+0xe8/0x180 net/strparser/strparser.c:415\\nprocess_one_work+0x3d3/0x720 kernel/workqueue.c:2289\\nworker_thread+0x618/0xa70 kernel/workqueue.c:2436\\nkthread+0x1a9/0x1e0 kernel/kthread.c:376\\nret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\\n\\nread to 0xffff88810784e3d0 of 1 bytes by task 17869 on cpu 0:\\nkcm_rfree+0x121/0x220 net/kcm/kcmsock.c:181\\nskb_release_head_state+0x8e/0x160 net/core/skbuff.c:841\\nskb_release_all net/core/skbuff.c:852 [inline]\\n__kfree_skb net/core/skbuff.c:868 [inline]\\nkfree_skb_reason+0x5c/0x260 net/core/skbuff.c:891\\nkfree_skb include/linux/skbuff.h:1216 [inline]\\nkcm_recvmsg+0x226/0x2b0 net/kcm/kcmsock.c:1161\\n____sys_recvmsg+0x16c/0x2e0\\n___sys_recvmsg net/socket.c:2743 [inline]\\ndo_recvmmsg+0x2f1/0x710 net/socket.c:2837\\n__sys_recvmmsg net/socket.c:2916 [inline]\\n__do_sys_recvmmsg net/socket.c:2939 [inline]\\n__se_sys_recvmmsg net/socket.c:2932 [inline]\\n__x64_sys_recvmmsg+0xde/0x160 net/socket.c:2932\\ndo_syscall_x64 arch/x86/entry/common.c:50 [inline]\\ndo_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80\\nentry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\nvalue changed: 0x01 -\u003e 0x00\\n\\nReported by Kernel Concurrency Sanitizer on:\\nCPU: 0 PID: 17869 Comm: syz-executor.2 Not tainted 6.1.0-rc1-syzkaller-00010-gbb1a1146467a-dirty #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0c745b5141a45a076f1cb9772a399f7ebcb0948a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2733fb2ad5bfbe6538f2f93a21f2504e3dba9d6a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/62086d1c4602e4f2ec07b975165afc2ed0ff1be9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/663682cd3192dd4f3547b7890a4391c72441001d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9ae47f11493509cde707af8ecc7eee04c8b8e635\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dbc3a0b917c4f75292b1c0819c188e40fd3c8924\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e2a28807b1ceaa309164b92c38d73d12feea33df\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f1f7122bb2ef056afc6f91ce4c35ab6df1207c8d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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