FKIE_CVE-2024-26840

Vulnerability from fkie_nvd - Published: 2024-04-17 10:15 - Updated: 2025-01-07 17:13
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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): [<ffffffff8eb8a1a5>] kmem_cache_alloc+0x2d5/0x370 [<ffffffff8e917f86>] prepare_creds+0x26/0x2e0 [<ffffffffc002eeef>] cachefiles_determine_cache_security+0x1f/0x120 [<ffffffffc00243ec>] cachefiles_add_cache+0x13c/0x3a0 [<ffffffffc0025216>] cachefiles_daemon_write+0x146/0x1c0 [<ffffffff8ebc4a3b>] vfs_write+0xcb/0x520 [<ffffffff8ebc5069>] ksys_write+0x69/0xf0 [<ffffffff8f6d4662>] do_syscall_64+0x72/0x140 [<ffffffff8f8000aa>] 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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlMailing List
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlMailing List
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
linux linux_kernel 6.8
To clipboard 

{
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cachefiles: corrige la p\u00e9rdida de memoria en cachefiles_add_cache() Se inform\u00f3 la siguiente p\u00e9rdida de memoria despu\u00e9s de desvincular /dev/cachefiles: ================= ==================================================== objeto sin referencia 0xffff9b674176e3c0 (tama\u00f1o 192): comm \"cachefilesd2\", pid 680, jiffies 4294881224 volcado hexadecimal (primeros 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 ................ retroceso (crc ea38a44b): [ ] kmem_cache_alloc+0x2d5/0x370 [] prepare_creds+0x26/0x2e0 [] cachefiles_determine_cache_security+0x1f/0x120 [] cachefiles_add_cache+0x13c/0x 3a0 [] 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 =============== ==================================================== == Coloque el recuento de referencias de cache_cred en cachefiles_daemon_unbind() para solucionar el problema. Y tambi\u00e9n coloque cache_cred en la rama de error cachefiles_add_cache() para evitar p\u00e9rdidas de memoria."
    }
  ],
  "id": "CVE-2024-26840",
  "lastModified": "2025-01-07T17:13:19.863",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-04-17T10:15:09.910",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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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.