{"id":"CVE-2026-31714","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-31714","generatedAt":"2026-10-28T03:38:46.868Z","title":"In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid memory leak in f2fs_rename() syzbot reported a f2fs bug as below: BUG: memory leak unreferenced object 0xffff888127f70830 (size 16): comm \"syz.0.23\", pid 6144,…","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid memory leak in f2fs_rename()\n\nsyzbot reported a f2fs bug as below:\n\nBUG: memory leak\nunreferenced object 0xffff888127f70830 (size 16):\n  comm \"syz.0.23\", pid 6144, jiffies 4294943712\n  hex dump (first 16 bytes):\n    3c af 57 72 5b e6 8f ad 6e 8e fd 33 42 39 03 ff  <.Wr[...n..3B9..\n  backtrace (crc 925f8a80):\n    kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]\n    slab_post_alloc_hook mm/slub.c:4520 [inline]\n    slab_alloc_node mm/slub.c:4844 [inline]\n    __do_kmalloc_node mm/slub.c:5237 [inline]\n    __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250\n    kmalloc_noprof include/linux/slab.h:954 [inline]\n    fscrypt_setup_filename+0x15e/0x3b0 fs/crypto/fname.c:364\n    f2fs_setup_filename+0x52/0xb0 fs/f2fs/dir.c:143\n    f2fs_rename+0x159/0xca0 fs/f2fs/namei.c:961\n    f2fs_rename2+0xd5/0xf20 fs/f2fs/namei.c:1308\n    vfs_rename+0x7ff/0x1250 fs/namei.c:6026\n    filename_renameat2+0x4f4/0x660 fs/namei.c:6144\n    __do_sys_renameat2 fs/namei.c:6173 [inline]\n    __se_sys_renameat2 fs/namei.c:6168 [inline]\n    __x64_sys_renameat2+0x59/0x80 fs/namei.c:6168\n    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n    do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94\n    entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe root cause is in commit 40b2d55e0452 (\"f2fs: fix to create selinux\nlabel during whiteout initialization\"), we added a call to\nf2fs_setup_filename() without a matching call to f2fs_free_filename(),\nfix it.","published":"2026-05-01T14:16:21.000Z","lastModified":"2026-06-17T10:34:18.000Z","status":"Analyzed","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-401"],"affected":["linux/linux kernel"],"epss":{"score":0.00114,"percentile":0.01445,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.11%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/047c0aef6af37a2a35181aa085c616ad286386f1","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/369eb2016d8e2f01931b3bad1cb9cefa83f44003","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3cf11e6f36c170050c12171dd6fd3142711478fc","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a76c1cad4e80a9802ef8048662255417e3ce5b79","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c78206dcb912ab60b8ee3cbe8c48d749a9a12e1e","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31714","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}