jfs: fix uninitialized waitqueue in transaction manager
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: jfs: fix uninitialized waitqueue in transaction manager The transaction manager initialization in txInit() was not properly initializing TxBlock[0].waitor waitqueue, causing a crash when txEnd(0) is called on read-only filesystems. When a filesystem is mounted read-only, txBegin() returns tid=0 to indicate no transaction. However, txEnd(0) still gets called and tries to access TxBlock[0].waitor via tid_to_tblock(0), but this waitqueue was never initialized because the initialization loop started at index 1 instead of 0. This causes a 'non-static key' lockdep warning and system crash: INFO: trying to register non-static key in txEnd Fix by ensuring all transaction blocks including TxBlock[0] have their waitqueues properly initialized during txInit().
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.4.255 to before 5.4.302; 5.10.192 to before 5.10.247; 5.15.123 to before 5.15.197; 6.1.42 to before 6.1.159; 4.14.324 to before 4.15; 4.19.293 to before 4.20; 6.4.7 to before 6.5 | 5.4.302, 5.10.247, 5.15.197, 6.1.159, 4.15, 4.20, 6.5 | Patch available | CNA |
| Linux | Linux | 6.5 and later | 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.58, 6.17.8, 6.18 | Patch available | CNA |
- Linux VendorLinux Affected 5.4.255 to before 5.4.302; 5.10.192 to before 5.10.247; 5.15.123 to before 5.15.197; 6.1.42 to before 6.1.159; 4.14.324 to before 4.15; 4.19.293 to before 4.20; 6.4.7 to before 6.5 Fixed in 5.4.302, 5.10.247, 5.15.197, 6.1.159, 4.15, 4.20, 6.5 Patch available CNA
- Linux VendorLinux Affected 6.5 and later Fixed in 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.58, 6.17.8, 6.18 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.4.302, 5.10.247, 5.15.197, 6.1.159, 4.15, 4.20, 6.5
- Fix · CNA Linux (Linux) Fixed in 5.4.302, 5.10.247, 5.15.197, 6.1.159, 6.6.117, 6.12.58, 6.17.8, 6.18
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
Not affected: 4 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2025-68168
- 2026-10-03 Alias added: GHSA-35pf-3h4j-jg2m
References
Other 8
- https://git.kernel.org/stable/c/d6af7fce2e162ac68e85d3a11eb6ac8c35b24b64
- https://git.kernel.org/stable/c/8cae9cf23e0bd424ac904e753639a587543ce03a
- https://git.kernel.org/stable/c/a2aa97cde9857f881920635a2e3d3b11769619c5
- https://git.kernel.org/stable/c/d2dd7ca05a11685c314e62802a55e8d67a90e974
- https://git.kernel.org/stable/c/2a9575a372182ca075070b3cd77490dcf0c951e7
- https://git.kernel.org/stable/c/cbf2f527ae4ca7c7dabce42e85e8deb58588a37e
- https://git.kernel.org/stable/c/038861414ab383b41dd35abbf9ff0ef715592d53
- https://git.kernel.org/stable/c/300b072df72694ea330c4c673c035253e07827b8
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Sources
- CVE-2025-68168 · CVE Program
- CVE-2025-68168 · NVD
- FIRST EPSS
- GHSA-35pf-3h4j-jg2m · GitHub Advisory Database · CC BY 4.0
- CVE-2025-68168 · Red Hat security data · CC BY 4.0
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