{"schema_version":"1.9.0","id":"CVE-2024-26840","published":"2024-04-17T10:10:06.180Z","modified":"2026-08-12T03:51:17.601270796Z","related":["SUSE-SU-2024:1642-1","SUSE-SU-2024:1643-1","SUSE-SU-2024:1644-1","SUSE-SU-2024:1645-1","SUSE-SU-2024:1646-1","SUSE-SU-2024:1650-1","SUSE-SU-2024:1870-1","SUSE-SU-2024:2008-1","SUSE-SU-2024:2011-1","SUSE-SU-2024:2189-1","SUSE-SU-2024:2190-1"],"summary":"cachefiles: fix memory leak in cachefiles_add_cache()","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    [<ffffffff8eb8a1a5>] kmem_cache_alloc+0x2d5/0x370\n    [<ffffffff8e917f86>] prepare_creds+0x26/0x2e0\n    [<ffffffffc002eeef>] cachefiles_determine_cache_security+0x1f/0x120\n    [<ffffffffc00243ec>] cachefiles_add_cache+0x13c/0x3a0\n    [<ffffffffc0025216>] cachefiles_daemon_write+0x146/0x1c0\n    [<ffffffff8ebc4a3b>] vfs_write+0xcb/0x520\n    [<ffffffff8ebc5069>] ksys_write+0x69/0xf0\n    [<ffffffff8f6d4662>] do_syscall_64+0x72/0x140\n    [<ffffffff8f8000aa>] 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.","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"9ae326a69004dea8af2dae4fde58de27db700a8d"},{"fixed":"cb5466783793e66272624cf71925ae1d1ba32083"},{"fixed":"037d5a949b0455540ef9aab34c10ddf54b65d285"},{"fixed":"43eccc5823732ba6daab2511ed32dfc545a666d8"},{"fixed":"94965be37add0983672e48ecb33cdbda92b62579"},{"fixed":"8b218e2f0a27a9f09428b1847b4580640b9d1e58"},{"fixed":"38e921616320d159336b0ffadb09e9fb4945c7c3"},{"fixed":"9cac69912052a4def571fedf1cb9bb4ec590e25a"},{"fixed":"e21a2f17566cbd64926fb8f16323972f7a064444"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26840.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.30"},{"fixed":"4.19.309"}]},{"type":"ECOSYSTEM","events":[{"introduced":"4.20.0"},{"fixed":"5.4.271"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.151"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.80"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.19"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.7.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26840.json"}}],"references":[{"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"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26840.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26840"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26840.json"}}