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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-72163

ocfs2: fix NULL h_transaction deref in ocfs2_assure_trans_credits

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • a68b896aa56e435506453ec8835bc991ec3ae687 to < 2d80e9c56718435a9c9f5f24dbc954989aead579affected
  • 320273b5649bbcee87f9e65343077189699d2a7a to < 942b818b396c24c452681803ff291552317d2ef1affected
  • 9ea2d1c6789722d58ec191f14f9a02518d55b6b4 to < 7146d191dae3a8efdb957993fb61a55713186266affected
  • c05ffb693bfb42a48ef3ee88a55b57392984e111 to < f14aaaa130356ee4adb44de947c098637c70df8faffected
  • be346c1a6eeb49d8fda827d2a9522124c2f72f36 to < 6ad7532a23bc94076efe9f1486dd7f7493c090ffaffected
  • be346c1a6eeb49d8fda827d2a9522124c2f72f36 to < bd73971fad89d5ee4ea0ba9b92d2ea08733c4a64affected
  • be346c1a6eeb49d8fda827d2a9522124c2f72f36 to < 253ed993e0b36997ec7b04c1ff76103b38241de2affected
  • be346c1a6eeb49d8fda827d2a9522124c2f72f36 to < f9ab30c96b0f00c20c6dac93681bdae3a033d229affected
  • 331d1079d58206ff7dc5518185f800b412f89bc6affected
  • 5.10.221 to < 5.10.261affected
  • 5.15.162 to < 5.15.212affected
  • 6.1.97 to < 6.1.178affected
  • 6.6.37 to < 6.6.145affected
  • 6.9.8 to < 6.10affected

Linux Linux

Default version status: affected

  • 6.10affected
  • 0 to < 6.10unaffected
  • 5.10.261 to ≤ 5.10.*unaffected
  • 5.15.212 to ≤ 5.15.*unaffected
  • 6.1.178 to ≤ 6.1.*unaffected
  • 6.6.145 to ≤ 6.6.*unaffected
  • 6.12.97 to ≤ 6.12.*unaffected
  • 6.18.40 to ≤ 6.18.*unaffected
  • 7.1.5 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References