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CVE-2024-39467 (GCVE-0-2024-39467)

Vulnerability from cvelistv5 – Published: 2024-06-25 14:25 – Updated: 2026-08-05 11:33
VLAI
Title
f2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode()
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode() syzbot reports a kernel bug as below: F2FS-fs (loop0): Mounted with checkpoint version = 48b305e4 ================================================================== BUG: KASAN: slab-out-of-bounds in f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline] BUG: KASAN: slab-out-of-bounds in current_nat_addr fs/f2fs/node.h:213 [inline] BUG: KASAN: slab-out-of-bounds in f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600 Read of size 1 at addr ffff88807a58c76c by task syz-executor280/5076 CPU: 1 PID: 5076 Comm: syz-executor280 Not tainted 6.9.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline] current_nat_addr fs/f2fs/node.h:213 [inline] f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600 f2fs_xattr_fiemap fs/f2fs/data.c:1848 [inline] f2fs_fiemap+0x55d/0x1ee0 fs/f2fs/data.c:1925 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1c07/0x2e50 fs/ioctl.c:838 __do_sys_ioctl fs/ioctl.c:902 [inline] __se_sys_ioctl+0x81/0x170 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The root cause is we missed to do sanity check on i_xattr_nid during f2fs_iget(), so that in fiemap() path, current_nat_addr() will access nat_bitmap w/ offset from invalid i_xattr_nid, result in triggering kasan bug report, fix it.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-25 20:07 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < c559a8d840562fbfce9f318448dda2f7d3e6d8e8 (git)
Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 75c87e2ac6149abf44bdde0dd6d541763ddb0dff (git)
Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 1640dcf383cdba52be8b28d2a1a2aa7ef7a30c98 (git)
Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 8c8aa473fe6eb46a4bf99f3ea2dbe52bf0c1a1f0 (git)
Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < be0155202e431f3007778568a72432c68f8946ba (git)
Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 68e3cd4ecb8603936cccdc338929130045df2e57 (git)
Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 20faaf30e55522bba2b56d9c46689233205d7717 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.8
Unaffected: 0 , < 3.8 (semver)
Unaffected: 5.4.278 , ≤ 5.4.* (semver)
Unaffected: 5.10.219 , ≤ 5.10.* (semver)
Unaffected: 5.15.161 , ≤ 5.15.* (semver)
Unaffected: 6.1.94 , ≤ 6.1.* (semver)
Unaffected: 6.6.34 , ≤ 6.6.* (semver)
Unaffected: 6.9.5 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode()\n\nsyzbot reports a kernel bug as below:\n\nF2FS-fs (loop0): Mounted with checkpoint version = 48b305e4\n==================================================================\nBUG: KASAN: slab-out-of-bounds in f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline]\nBUG: KASAN: slab-out-of-bounds in current_nat_addr fs/f2fs/node.h:213 [inline]\nBUG: KASAN: slab-out-of-bounds in f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600\nRead of size 1 at addr ffff88807a58c76c by task syz-executor280/5076\n\nCPU: 1 PID: 5076 Comm: syz-executor280 Not tainted 6.9.0-rc5-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0x169/0x550 mm/kasan/report.c:488\n kasan_report+0x143/0x180 mm/kasan/report.c:601\n f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline]\n current_nat_addr fs/f2fs/node.h:213 [inline]\n f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600\n f2fs_xattr_fiemap fs/f2fs/data.c:1848 [inline]\n f2fs_fiemap+0x55d/0x1ee0 fs/f2fs/data.c:1925\n ioctl_fiemap fs/ioctl.c:220 [inline]\n do_vfs_ioctl+0x1c07/0x2e50 fs/ioctl.c:838\n __do_sys_ioctl fs/ioctl.c:902 [inline]\n __se_sys_ioctl+0x81/0x170 fs/ioctl.c:890\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe root cause is we missed to do sanity check on i_xattr_nid during\nf2fs_iget(), so that in fiemap() path, current_nat_addr() will access\nnat_bitmap w/ offset from invalid i_xattr_nid, result in triggering\nkasan bug report, fix it."
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              "value": "AV:L - The vulnerable code is reached only through a locally attached/mounted crafted f2fs image, with the trigger being a local `ioctl(FS_IOC_FIEMAP, FIEMAP_FLAG_XATTR)` syscall or mount-time roll-forward recovery. No network or remote-peer data path exists into fs/f2fs/inode.c or the NAT lookup code.\nAC:L - The attacker fully controls every input \u2014 the on-disk `i_xattr_nid`, the checkpoint\u0027s NAT bitmap size, and the NAT/SSA/SIT block layout \u2014 so the out-of-range `NAT_BLOCK_OFFSET(nid)` deterministically indexes past `nm_i-\u003enat_bitmap` on the first attempt. There is no race, no dependence on uncontrollable memory layout, and no non-default kernel config (fiemap and roll-forward recovery are both default-enabled).\nPR:L - Once the image is mounted, any unprivileged user can trigger the out-of-bounds access with a plain `FS_IOC_FIEMAP` ioctl \u2014 there is no capability check anywhere on the path from `do_vfs_ioctl` through `f2fs_fiemap` to `current_nat_addr`. On Android (vold auto-mounts f2fs portable/adoptable storage) and desktop/kiosk systems (udisks2/polkit), an unprivileged console user gets the attacker\u0027s f2fs image mounted without root.\nUI:N - The attacker supplies their own crafted image and issues the fiemap ioctl themselves; removable-media auto-mount by udisks2/vold happens without any deliberate victim action. The recovery-path variant likewise fires automatically during the mount the attacker caused.\nS:U - The out-of-bounds read and the bit-flip write both stay inside the kernel\u0027s own address space and security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is a slab out-of-bounds read at an offset the attacker chooses byte-by-byte up to ~1.18 MB past a small `kmemdup`\u0027d `nat_bitmap`, so it is not a strictly bounded few-byte read. The bit read back selects which NAT block is parsed, and the resulting `ni.blk_addr` is returned to userspace as the fiemap extent\u0027s physical address, turning it into a repeatable oracle that discloses adjacent heap contents \u2014 kernel pointers and other slab objects \u2014 defeating KASLR.\nI:H - Via `f2fs_recover_xattr_data()` the bogus nid reaches `set_node_addr()`, which dirties a NAT set keyed on the out-of-range block offset; the next checkpoint then executes `f2fs_change_bit(block_off, nm_i-\u003enat_bitmap)` in `set_to_next_nat()` and `__set_bit_le(nat_index, nm_i-\u003eempty_nat_bits)` in `__update_nat_bits()` \u2014 out-of-bounds heap writes at an attacker-chosen offset. A controlled single-bit flip into a groomed adjacent slab object (pointer, refcount, or credential/permission field) is a well-established privilege-escalation primitive.\nA:H - The reported symptom is a KASAN slab-out-of-bounds report, which panics on `panic_on_warn`/hardened Android and cloud kernels; on non-KASAN kernels the read can walk into unmapped memory and oops. The out-of-bounds bit flips additionally corrupt the NAT bitmap and neighbouring heap objects, and `f2fs_bug_on`/`f2fs_handle_error` paths in the checkpoint flush stop the filesystem, so the crash is reliably re-triggerable."
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        {
          "lang": "es",
          "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: f2fs: correcci\u00f3n para realizar una verificaci\u00f3n de estado en i_xattr_nid en sanity_check_inode() syzbot informa un error en el kernel como se muestra a continuaci\u00f3n: F2FS-fs (loop0): Montado con la versi\u00f3n de punto de control = 48b305e4 ==== ==================================================== ============ ERROR: KASAN: losa fuera de los l\u00edmites en f2fs_test_bit fs/f2fs/f2fs.h:2933 [en l\u00ednea] ERROR: KASAN: losa fuera de los l\u00edmites en current_nat_addr fs/f2fs/node.h:213 [en l\u00ednea] ERROR: KASAN: losa fuera de los l\u00edmites en f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600 Lectura de tama\u00f1o 1 en la direcci\u00f3n ffff88807a58c76c mediante la tarea syz-executor280 /5076 CPU: 1 PID: 5076 Comm: syz-executor280 No contaminado 6.9.0-rc5-syzkaller #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 27/03/2024 Seguimiento de llamadas:  __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [en l\u00ednea] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report +0x143/0x180 mm/kasan/report.c:601 f2fs_test_bit fs/f2fs/f2fs.h:2933 [en l\u00ednea] current_nat_addr fs/f2fs/node.h:213 [en l\u00ednea] f2fs_get_node_info+0xece/0x1200 fs/f2fs/node. c:600 f2fs_xattr_fiemap fs/f2fs/data.c:1848 [en l\u00ednea] f2fs_fiemap+0x55d/0x1ee0 fs/f2fs/data.c:1925 ioctl_fiemap fs/ioctl.c:220 [en l\u00ednea] do_vfs_ioctl+0x1c07/0x2e50 ioctl. c:838 __do_sys_ioctl fs/ioctl.c:902 [en l\u00ednea] __se_sys_ioctl+0x81/0x170 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xf5/0x240 arch/x86/ Entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x77/0x7f La causa principal es que no hicimos una verificaci\u00f3n de cordura en i_xattr_nid durante f2fs_iget(), de modo que en la ruta fiemap(), current_nat_addr() acceder\u00e1 a nat_bitmap con desplazamiento desde i_xattr_nid no v\u00e1lido, resulta en la activaci\u00f3n del informe de error de Kasan, corr\u00edjalo."
        }
      ],
      "id": "CVE-2024-39467",
      "lastModified": "2024-11-21T09:27:43.647",
      "published": "2024-06-25T15:15:15.190",
      "references": [
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/1640dcf383cdba52be8b28d2a1a2aa7ef7a30c98"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/20faaf30e55522bba2b56d9c46689233205d7717"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/68e3cd4ecb8603936cccdc338929130045df2e57"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/75c87e2ac6149abf44bdde0dd6d541763ddb0dff"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/8c8aa473fe6eb46a4bf99f3ea2dbe52bf0c1a1f0"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/be0155202e431f3007778568a72432c68f8946ba"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/c559a8d840562fbfce9f318448dda2f7d3e6d8e8"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/1640dcf383cdba52be8b28d2a1a2aa7ef7a30c98"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/20faaf30e55522bba2b56d9c46689233205d7717"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/68e3cd4ecb8603936cccdc338929130045df2e57"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/75c87e2ac6149abf44bdde0dd6d541763ddb0dff"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/8c8aa473fe6eb46a4bf99f3ea2dbe52bf0c1a1f0"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/be0155202e431f3007778568a72432c68f8946ba"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/c559a8d840562fbfce9f318448dda2f7d3e6d8e8"
        }
      ],
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "fs/f2fs/inode.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "c559a8d840562fbfce9f318448dda2f7d3e6d8e8",
                    "status": "affected",
                    "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "75c87e2ac6149abf44bdde0dd6d541763ddb0dff",
                    "status": "affected",
                    "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "1640dcf383cdba52be8b28d2a1a2aa7ef7a30c98",
                    "status": "affected",
                    "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "8c8aa473fe6eb46a4bf99f3ea2dbe52bf0c1a1f0",
                    "status": "affected",
                    "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "be0155202e431f3007778568a72432c68f8946ba",
                    "status": "affected",
                    "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "68e3cd4ecb8603936cccdc338929130045df2e57",
                    "status": "affected",
                    "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "20faaf30e55522bba2b56d9c46689233205d7717",
                    "status": "affected",
                    "version": "98e4da8ca301e062d79ae168c67e56f3c3de3ce4",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "fs/f2fs/inode.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "3.8"
                  },
                  {
                    "lessThan": "3.8",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.4.*",
                    "status": "unaffected",
                    "version": "5.4.278",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.219",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.161",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.94",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.34",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.9.*",
                    "status": "unaffected",
                    "version": "6.9.5",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.10",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "ADDEDD23-B4FD-4B6A-8913-6742F221369B",
                    "versionEndExcluding": "5.4.278",
                    "versionStartIncluding": "3.8",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "E9063AF3-D593-43B7-810D-58B87F82F9F9",
                    "versionEndExcluding": "5.10.219",
                    "versionStartIncluding": "5.5",
                    "vulnerable": true
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                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "31130639-53FE-4726-8986-434EE2528CB2",
                    "versionEndExcluding": "5.15.161",
                    "versionStartIncluding": "5.11",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "9D20DE32-76F8-4E4C-A8DF-5B53082D18E5",
                    "versionEndExcluding": "6.1.94",
                    "versionStartIncluding": "5.16",
                    "vulnerable": true
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                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "6BD9DCFD-0342-4039-B8CE-70F26DB7173B",
                    "versionEndExcluding": "6.6.34",
                    "versionStartIncluding": "6.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "8366481F-770F-4850-9D0F-2977BD97D5C5",
                    "versionEndExcluding": "6.9.5",
                    "versionStartIncluding": "6.7",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode()\n\nsyzbot reports a kernel bug as below:\n\nF2FS-fs (loop0): Mounted with checkpoint version = 48b305e4\n==================================================================\nBUG: KASAN: slab-out-of-bounds in f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline]\nBUG: KASAN: slab-out-of-bounds in current_nat_addr fs/f2fs/node.h:213 [inline]\nBUG: KASAN: slab-out-of-bounds in f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600\nRead of size 1 at addr ffff88807a58c76c by task syz-executor280/5076\n\nCPU: 1 PID: 5076 Comm: syz-executor280 Not tainted 6.9.0-rc5-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0x169/0x550 mm/kasan/report.c:488\n kasan_report+0x143/0x180 mm/kasan/report.c:601\n f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline]\n current_nat_addr fs/f2fs/node.h:213 [inline]\n f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600\n f2fs_xattr_fiemap fs/f2fs/data.c:1848 [inline]\n f2fs_fiemap+0x55d/0x1ee0 fs/f2fs/data.c:1925\n ioctl_fiemap fs/ioctl.c:220 [inline]\n do_vfs_ioctl+0x1c07/0x2e50 fs/ioctl.c:838\n __do_sys_ioctl fs/ioctl.c:902 [inline]\n __se_sys_ioctl+0x81/0x170 fs/ioctl.c:890\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe root cause is we missed to do sanity check on i_xattr_nid during\nf2fs_iget(), so that in fiemap() path, current_nat_addr() will access\nnat_bitmap w/ offset from invalid i_xattr_nid, result in triggering\nkasan bug report, fix it."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: f2fs: correcci\u00f3n para realizar una verificaci\u00f3n de estado en i_xattr_nid en sanity_check_inode() syzbot informa un error en el kernel como se muestra a continuaci\u00f3n: F2FS-fs (loop0): Montado con la versi\u00f3n de punto de control = 48b305e4 ==== ==================================================== ============ ERROR: KASAN: losa fuera de los l\u00edmites en f2fs_test_bit fs/f2fs/f2fs.h:2933 [en l\u00ednea] ERROR: KASAN: losa fuera de los l\u00edmites en current_nat_addr fs/f2fs/node.h:213 [en l\u00ednea] ERROR: KASAN: losa fuera de los l\u00edmites en f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600 Lectura de tama\u00f1o 1 en la direcci\u00f3n ffff88807a58c76c mediante la tarea syz-executor280 /5076 CPU: 1 PID: 5076 Comm: syz-executor280 No contaminado 6.9.0-rc5-syzkaller #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 27/03/2024 Seguimiento de llamadas:  __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [en l\u00ednea] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report +0x143/0x180 mm/kasan/report.c:601 f2fs_test_bit fs/f2fs/f2fs.h:2933 [en l\u00ednea] current_nat_addr fs/f2fs/node.h:213 [en l\u00ednea] f2fs_get_node_info+0xece/0x1200 fs/f2fs/node. c:600 f2fs_xattr_fiemap fs/f2fs/data.c:1848 [en l\u00ednea] f2fs_fiemap+0x55d/0x1ee0 fs/f2fs/data.c:1925 ioctl_fiemap fs/ioctl.c:220 [en l\u00ednea] do_vfs_ioctl+0x1c07/0x2e50 ioctl. c:838 __do_sys_ioctl fs/ioctl.c:902 [en l\u00ednea] __se_sys_ioctl+0x81/0x170 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xf5/0x240 arch/x86/ Entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x77/0x7f La causa principal es que no hicimos una verificaci\u00f3n de cordura en i_xattr_nid durante f2fs_iget(), de modo que en la ruta fiemap(), current_nat_addr() acceder\u00e1 a nat_bitmap con desplazamiento desde i_xattr_nid no v\u00e1lido, resulta en la activaci\u00f3n del informe de error de Kasan, corr\u00edjalo."
          }
        ],
        "id": "CVE-2024-39467",
        "lastModified": "2026-08-04T11:18:56.140",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.1,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.2,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
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                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-06-25T20:07:46.450278Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2024-06-25T15:15:15.190",
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      "initial_release_date": "2024-06-25T00:00:00+00:00",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: f2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-39467.json",
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      "current_release_date": "2026-08-29T01:53:06Z",
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      "id": "CVE-2024-39467",
      "initial_release_date": "2024-06-26T23:17:21Z",
      "product_status:known_not_affected": "373",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-39467",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-39467.json",
      "version": "18"
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                    "options": [
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              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode()\n\nsyzbot reports a kernel bug as below:\n\nF2FS-fs (loop0): Mounted with checkpoint version = 48b305e4\n==================================================================\nBUG: KASAN: slab-out-of-bounds in f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline]\nBUG: KASAN: slab-out-of-bounds in current_nat_addr fs/f2fs/node.h:213 [inline]\nBUG: KASAN: slab-out-of-bounds in f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600\nRead of size 1 at addr ffff88807a58c76c by task syz-executor280/5076\n\nCPU: 1 PID: 5076 Comm: syz-executor280 Not tainted 6.9.0-rc5-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0x169/0x550 mm/kasan/report.c:488\n kasan_report+0x143/0x180 mm/kasan/report.c:601\n f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline]\n current_nat_addr fs/f2fs/node.h:213 [inline]\n f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600\n f2fs_xattr_fiemap fs/f2fs/data.c:1848 [inline]\n f2fs_fiemap+0x55d/0x1ee0 fs/f2fs/data.c:1925\n ioctl_fiemap fs/ioctl.c:220 [inline]\n do_vfs_ioctl+0x1c07/0x2e50 fs/ioctl.c:838\n __do_sys_ioctl fs/ioctl.c:902 [inline]\n __se_sys_ioctl+0x81/0x170 fs/ioctl.c:890\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe root cause is we missed to do sanity check on i_xattr_nid during\nf2fs_iget(), so that in fiemap() path, current_nat_addr() will access\nnat_bitmap w/ offset from invalid i_xattr_nid, result in triggering\nkasan bug report, fix it."
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}



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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

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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.


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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.