GHSA-G638-G65R-64RM

Vulnerability from github – Published: 2024-04-17 12:32 – Updated: 2025-01-07 18:30
VLAI?
Details

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

cachefiles: fix memory leak in cachefiles_add_cache()

The following memory leak was reported after unbinding /dev/cachefiles:

================================================================== unreferenced object 0xffff9b674176e3c0 (size 192): comm "cachefilesd2", pid 680, jiffies 4294881224 hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc ea38a44b): [] kmem_cache_alloc+0x2d5/0x370 [] prepare_creds+0x26/0x2e0 [] cachefiles_determine_cache_security+0x1f/0x120 [] cachefiles_add_cache+0x13c/0x3a0 [] cachefiles_daemon_write+0x146/0x1c0 [] vfs_write+0xcb/0x520 [] ksys_write+0x69/0xf0 [] do_syscall_64+0x72/0x140 [] entry_SYSCALL_64_after_hwframe+0x6e/0x76 ==================================================================

Put the reference count of cache_cred in cachefiles_daemon_unbind() to fix the problem. And also put cache_cred in cachefiles_add_cache() error branch to avoid memory leaks.

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2024-26840"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-04-17T10:15:09Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncachefiles: fix memory leak in cachefiles_add_cache()\n\nThe following memory leak was reported after unbinding /dev/cachefiles:\n\n==================================================================\nunreferenced object 0xffff9b674176e3c0 (size 192):\n  comm \"cachefilesd2\", pid 680, jiffies 4294881224\n  hex dump (first 32 bytes):\n    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace (crc ea38a44b):\n    [\u003cffffffff8eb8a1a5\u003e] kmem_cache_alloc+0x2d5/0x370\n    [\u003cffffffff8e917f86\u003e] prepare_creds+0x26/0x2e0\n    [\u003cffffffffc002eeef\u003e] cachefiles_determine_cache_security+0x1f/0x120\n    [\u003cffffffffc00243ec\u003e] cachefiles_add_cache+0x13c/0x3a0\n    [\u003cffffffffc0025216\u003e] cachefiles_daemon_write+0x146/0x1c0\n    [\u003cffffffff8ebc4a3b\u003e] vfs_write+0xcb/0x520\n    [\u003cffffffff8ebc5069\u003e] ksys_write+0x69/0xf0\n    [\u003cffffffff8f6d4662\u003e] do_syscall_64+0x72/0x140\n    [\u003cffffffff8f8000aa\u003e] entry_SYSCALL_64_after_hwframe+0x6e/0x76\n==================================================================\n\nPut the reference count of cache_cred in cachefiles_daemon_unbind() to\nfix the problem. And also put cache_cred in cachefiles_add_cache() error\nbranch to avoid memory leaks.",
  "id": "GHSA-g638-g65r-64rm",
  "modified": "2025-01-07T18:30:42Z",
  "published": "2024-04-17T12:32:03Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26840"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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