CVE-2024-57896: Linux kernel · Use After Free
Source GCVE Database
Not known to be exploited · CVSS 7.8 High.
Data as of 30 Oct 2026, 00:59 UTC
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 15 Jan 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
AI-suggested
Until a fix is applied, avoid unmounting Btrfs filesystems under conditions that might trigger this issue in kernel versions suspected to be vulnerable.
Description
CVE-2024-57896 is a use-after-free vulnerability in the Linux kernel's Btrfs filesystem code. It occurs during the unmount process when the cleaner kernel thread is stopped before all delayed allocation worker threads have finished, leading to a use-after-free on the task_struct. This flaw can cause memory corruption and potentially lead to system crashes or privilege escalation.
References
- nvd.nist.gov/vuln/detail/CVE-2024-57896 (opens in a new tab)
- git.kernel.org/stable/c/1ea629e7bb2fb40555e5e01a1b5095df31287017 (opens in a new tab)
- git.kernel.org/stable/c/35916b2f96505a18dc7242a115611b718d9de725 (opens in a new tab)
- git.kernel.org/stable/c/63f4b594a688bf922e8691f0784679aa7af7988c (opens in a new tab)
- git.kernel.org/stable/c/a2718ed1eb8c3611b63f8933c7e68c8821fe2808 (opens in a new tab)
- git.kernel.org/stable/c/d77a3a99b53d12c061c007cdc96df38825dee476 (opens in a new tab)
- git.kernel.org/stable/c/f10bef73fb355e3fc85e63a50386798be68ff486 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/03/msg00001.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/03/msg00002.html (opens in a new tab)