CVE-2026-72163
ocfs2: fix NULL h_transaction deref in ocfs2_assure_trans_credits
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix NULL h_transaction deref in ocfs2_assure_trans_credits [BUG] A direct write over unwritten extents can panic the kernel in ocfs2_assure_trans_credits() when the journal aborts during DIO completion. The crash is a general protection fault from a NULL pointer dereference. [CAUSE] ocfs2_dio_end_io_write() loops over a direct write's unwritten extents, marking each written under a single journal handle. If the journal aborts (for example after an I/O error) while the extent tree is being updated, the handle is left aborted with its transaction pointer cleared. The extent merge treats that failure as not critical and reports success, so the loop keeps using the handle. ocfs2_assure_trans_credits() reads the handle's remaining credits without first checking whether the handle is aborted, and that read dereferences the cleared transaction pointer. [FIX] A journal abort is recorded in the handle itself, so callers are expected to test the handle rather than rely on a returned error. Make ocfs2_assure_trans_credits() do that, as the other ocfs2 journal helpers already do, and return -EROFS when the handle is aborted.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ a68b896aa56e435506453ec8835bc991ec3ae687; < 2d80e9c56718435a9c9f5f24dbc954989aead579 (affected, git) ≥ 320273b5649bbcee87f9e65343077189699d2a7a; < 942b818b396c24c452681803ff291552317d2ef1 (affected, git) ≥ 9ea2d1c6789722d58ec191f14f9a02518d55b6b4; < 7146d191dae3a8efdb957993fb61a55713186266 (affected, git) ≥ c05ffb693bfb42a48ef3ee88a55b57392984e111; < f14aaaa130356ee4adb44de947c098637c70df8f (affected, git) ≥ be346c1a6eeb49d8fda827d2a9522124c2f72f36; < 6ad7532a23bc94076efe9f1486dd7f7493c090ff (affected, git) ≥ be346c1a6eeb49d8fda827d2a9522124c2f72f36; < bd73971fad89d5ee4ea0ba9b92d2ea08733c4a64 (affected, git) ≥ be346c1a6eeb49d8fda827d2a9522124c2f72f36; < 253ed993e0b36997ec7b04c1ff76103b38241de2 (affected, git) ≥ be346c1a6eeb49d8fda827d2a9522124c2f72f36; < f9ab30c96b0f00c20c6dac93681bdae3a033d229 (affected, git) 331d1079d58206ff7dc5518185f800b412f89bc6 (affected, git) ≥ 5.10.221; < 5.10.261 (affected, semver) ≥ 5.15.162; < 5.15.212 (affected, semver) ≥ 6.1.97; < 6.1.178 (affected, semver) ≥ 6.6.37; < 6.6.145 (affected, semver) ≥ 6.9.8; < 6.10 (affected, semver) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
6.10 (affected) ≥ 0; < 6.10 (unaffected, semver) ≥ 5.10.261; ≤ 5.10.* (unaffected, semver) ≥ 5.15.212; ≤ 5.15.* (unaffected, semver) ≥ 6.1.178; ≤ 6.1.* (unaffected, semver) ≥ 6.6.145; ≤ 6.6.* (unaffected, semver) ≥ 6.12.97; ≤ 6.12.* (unaffected, semver) ≥ 6.18.40; ≤ 6.18.* (unaffected, semver) ≥ 7.1.5; ≤ 7.1.* (unaffected, semver) ≥ 7.2; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/2d80e9c56718435a9c9f5f24dbc954989aead579CNA: Linux
- https://git.kernel.org/stable/c/942b818b396c24c452681803ff291552317d2ef1CNA: Linux
- https://git.kernel.org/stable/c/7146d191dae3a8efdb957993fb61a55713186266CNA: Linux
- https://git.kernel.org/stable/c/f14aaaa130356ee4adb44de947c098637c70df8fCNA: Linux
- https://git.kernel.org/stable/c/6ad7532a23bc94076efe9f1486dd7f7493c090ffCNA: Linux
- https://git.kernel.org/stable/c/bd73971fad89d5ee4ea0ba9b92d2ea08733c4a64CNA: Linux
- https://git.kernel.org/stable/c/253ed993e0b36997ec7b04c1ff76103b38241de2CNA: Linux
- https://git.kernel.org/stable/c/f9ab30c96b0f00c20c6dac93681bdae3a033d229CNA: Linux
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