CVE-2024-41049 filelock: fix potential use-after-free in posix_lock_inode

2024-07-2914:32:05

Linux

www.cve.org

linux kernel

vulnerability

use-after-free

posix_lock_inode

kasan

tracepoint

spinlock

EPSS

Percentile

5.0%

JSON

In the Linux kernel, the following vulnerability has been resolved:

filelock: fix potential use-after-free in posix_lock_inode

Light Hsieh reported a KASAN UAF warning in trace_posix_lock_inode().
The request pointer had been changed earlier to point to a lock entry
that was added to the inode’s list. However, before the tracepoint could
fire, another task raced in and freed that lock.

Fix this by moving the tracepoint inside the spinlock, which should
ensure that this doesn’t happen.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/locks.c"
    ],
    "versions": [
      {
        "version": "117fb80cd1e6",
        "lessThan": "1cbbb3d9475c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a6f4129378ca",
        "lessThan": "7d4c14f4b511",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "766e56faddbe",
        "lessThan": "02a896426075",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "34bff6d85001",
        "lessThan": "5cb36e35bc10",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "74f6f5912693",
        "lessThan": "432b06b69d1d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "74f6f5912693",
        "lessThan": "116599f6a269",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "74f6f5912693",
        "lessThan": "1b3ec4f7c03d",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/locks.c"
    ],
    "versions": [
      {
        "version": "6.6",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.6",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.280",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.222",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.163",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.100",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.41",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.10",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]