cve-2024-26840
Vulnerability from cvelistv5
Published
2024-04-17 10:10
Modified
2024-08-02 00:14
Severity
Summary
cachefiles: fix memory leak in cachefiles_add_cache()
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website


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          "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."
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26840",
    "datePublished": "2024-04-17T10:10:06.180Z",
    "dateReserved": "2024-02-19T14:20:24.182Z",
    "dateUpdated": "2024-08-02T00:14:13.702Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26840\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-17T10:15:09.910\",\"lastModified\":\"2024-06-27T13:15:56.713\",\"vulnStatus\":\"Awaiting Analysis\",\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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