CVE-2025-68168: Linux kernel · jfs: fix uninitialized waitqueue in transaction manager
Source GCVE Database
Not known to be exploited · CVSS 7.8 High.
Data as of 26 Oct 2026, 12:55 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
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 16 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.
What to do
AI-suggested
A fix is available that properly initializes the waitqueue for TxBlock[0] during transaction manager initialization. Users should apply the official Linux kernel patch that addresses this issue. Patch status is not explicitly confirmed in the provided data; therefore, check the vendor advisory for current remediation guidance.
Description
A vulnerability in the Linux kernel's JFS transaction manager was fixed by properly initializing the waitqueue for TxBlock[0]. The issue caused a system crash when txEnd(0) was called on read-only filesystems due to an uninitialized waitqueue. This led to a lockdep warning and crash. The fix ensures all transaction blocks, including TxBlock[0], have their waitqueues initialized during txInit().
References
- nvd.nist.gov/vuln/detail/CVE-2025-68168 (opens in a new tab)
- git.kernel.org/stable/c/038861414ab383b41dd35abbf9ff0ef715592d53 (opens in a new tab)
- git.kernel.org/stable/c/2a9575a372182ca075070b3cd77490dcf0c951e7 (opens in a new tab)
- git.kernel.org/stable/c/300b072df72694ea330c4c673c035253e07827b8 (opens in a new tab)
- git.kernel.org/stable/c/8cae9cf23e0bd424ac904e753639a587543ce03a (opens in a new tab)
- git.kernel.org/stable/c/a2aa97cde9857f881920635a2e3d3b11769619c5 (opens in a new tab)
- git.kernel.org/stable/c/cbf2f527ae4ca7c7dabce42e85e8deb58588a37e (opens in a new tab)
- git.kernel.org/stable/c/d2dd7ca05a11685c314e62802a55e8d67a90e974 (opens in a new tab)
- git.kernel.org/stable/c/d6af7fce2e162ac68e85d3a11eb6ac8c35b24b64 (opens in a new tab)