{"id":"CVE-2024-53143","url":"https://www.cyber-defence.io/tools/cve/CVE-2024-53143","generatedAt":"2026-10-28T10:47:19.302Z","title":"In the Linux kernel, the following vulnerability has been resolved: fsnotify: Fix ordering of iput() and watched_objects decrement Ensure the superblock is kept alive until we're done with iput().","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfsnotify: Fix ordering of iput() and watched_objects decrement\n\nEnsure the superblock is kept alive until we're done with iput().\nHolding a reference to an inode is not allowed unless we ensure the\nsuperblock stays alive, which fsnotify does by keeping the\nwatched_objects count elevated, so iput() must happen before the\nwatched_objects decrement.\nThis can lead to a UAF of something like sb->s_fs_info in tmpfs, but the\nUAF is hard to hit because race orderings that oops are more likely, thanks\nto the CHECK_DATA_CORRUPTION() block in generic_shutdown_super().\n\nAlso, ensure that fsnotify_put_sb_watched_objects() doesn't call\nfsnotify_sb_watched_objects() on a superblock that may have already been\nfreed, which would cause a UAF read of sb->s_fsnotify_info.","published":"2024-12-07T07:15:04.000Z","lastModified":"2026-06-17T08:08:24.000Z","status":"Analyzed","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-416"],"affected":["linux/linux kernel"],"epss":{"score":0.00213,"percentile":0.11544,"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":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.21%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/21d1b618b6b9da46c5116c640ac4b1cc8d40d63a","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/45a8f8232a495221ed058191629f5c628f21601a","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/83af1cfa10d9aafdabd06b3655e07727f373b434","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://project-zero.issues.chromium.org/issues/379667898","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2024-53143","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."}