0.0
NA
CVE-2026-72163
ocfs2: fix NULL h_transaction deref in ocfs2_assure_trans_credits
Overview
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.
Details
INFO
Published Date :
Aug. 15, 2026, 6:21 a.m.
Last Modified :
Aug. 17, 2026, 6:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Fix NULL pointer dereference in ocfs2_assure_trans_credits due to journal abort.
- Update the Linux kernel to the patched version.
- Ensure journal aborts are checked before accessing transaction pointers.
- Verify ocfs2_assure_trans_credits handles aborted journals correctly.
References
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associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
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weaknesses.
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CVE-2026-72163 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a68b896aa56e435506453ec8835bc991ec3ae687', 'lessThan': '2d80e9c56718435a9c9f5f24dbc954989aead579', 'versionType': 'git'}, {'status': 'affected', 'version': '320273b5649bbcee87f9e65343077189699d2a7a', 'lessThan': '942b818b396c24c452681803ff291552317d2ef1', 'versionType': 'git'}, {'status': 'affected', 'version': '9ea2d1c6789722d58ec191f14f9a02518d55b6b4', 'lessThan': '7146d191dae3a8efdb957993fb61a55713186266', 'versionType': 'git'}, {'status': 'affected', 'version': 'c05ffb693bfb42a48ef3ee88a55b57392984e111', 'lessThan': 'f14aaaa130356ee4adb44de947c098637c70df8f', 'versionType': 'git'}, {'status': 'affected', 'version': 'be346c1a6eeb49d8fda827d2a9522124c2f72f36', 'lessThan': '6ad7532a23bc94076efe9f1486dd7f7493c090ff', 'versionType': 'git'}, {'status': 'affected', 'version': 'be346c1a6eeb49d8fda827d2a9522124c2f72f36', 'lessThan': 'bd73971fad89d5ee4ea0ba9b92d2ea08733c4a64', 'versionType': 'git'}, {'status': 'affected', 'version': 'be346c1a6eeb49d8fda827d2a9522124c2f72f36', 'lessThan': '253ed993e0b36997ec7b04c1ff76103b38241de2', 'versionType': 'git'}, {'status': 'affected', 'version': 'be346c1a6eeb49d8fda827d2a9522124c2f72f36', 'lessThan': 'f9ab30c96b0f00c20c6dac93681bdae3a033d229', 'versionType': 'git'}, {'status': 'affected', 'version': '331d1079d58206ff7dc5518185f800b412f89bc6', 'versionType': 'git'}, {'status': 'affected', 'version': '5.10.221', 'lessThan': '5.10.261', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.162', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.97', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.37', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.9.8', 'lessThan': '6.10', 'versionType': 'semver'}], 'programFiles': ['fs/ocfs2/journal.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/ocfs2/journal.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a68b896aa56e435506453ec8835bc991ec3ae687', 'lessThan': '2d80e9c56718435a9c9f5f24dbc954989aead579', 'versionType': 'git'}, {'status': 'affected', 'version': '320273b5649bbcee87f9e65343077189699d2a7a', 'lessThan': '942b818b396c24c452681803ff291552317d2ef1', 'versionType': 'git'}, {'status': 'affected', 'version': '9ea2d1c6789722d58ec191f14f9a02518d55b6b4', 'lessThan': '7146d191dae3a8efdb957993fb61a55713186266', 'versionType': 'git'}, {'status': 'affected', 'version': 'c05ffb693bfb42a48ef3ee88a55b57392984e111', 'lessThan': 'f14aaaa130356ee4adb44de947c098637c70df8f', 'versionType': 'git'}, {'status': 'affected', 'version': 'be346c1a6eeb49d8fda827d2a9522124c2f72f36', 'lessThan': '6ad7532a23bc94076efe9f1486dd7f7493c090ff', 'versionType': 'git'}, {'status': 'affected', 'version': 'be346c1a6eeb49d8fda827d2a9522124c2f72f36', 'lessThan': 'bd73971fad89d5ee4ea0ba9b92d2ea08733c4a64', 'versionType': 'git'}, {'status': 'affected', 'version': 'be346c1a6eeb49d8fda827d2a9522124c2f72f36', 'lessThan': '253ed993e0b36997ec7b04c1ff76103b38241de2', 'versionType': 'git'}, {'status': 'affected', 'version': 'be346c1a6eeb49d8fda827d2a9522124c2f72f36', 'lessThan': 'f9ab30c96b0f00c20c6dac93681bdae3a033d229', 'versionType': 'git'}, {'status': 'affected', 'version': '331d1079d58206ff7dc5518185f800b412f89bc6', 'versionType': 'git'}, {'status': 'affected', 'version': '5.10.221', 'lessThan': '5.10.261', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.162', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.97', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.37', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.9.8', 'lessThan': '6.10', 'versionType': 'semver'}], 'programFiles': ['fs/ocfs2/journal.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/ocfs2/journal.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a68b896aa56e435506453ec8835bc991ec3ae687', 'lessThan': '2d80e9c56718435a9c9f5f24dbc954989aead579', 'versionType': 'git'}, {'status': 'affected', 'version': '320273b5649bbcee87f9e65343077189699d2a7a', 'lessThan': '942b818b396c24c452681803ff291552317d2ef1', 'versionType': 'git'}, {'status': 'affected', 'version': '9ea2d1c6789722d58ec191f14f9a02518d55b6b4', 'lessThan': '7146d191dae3a8efdb957993fb61a55713186266', 'versionType': 'git'}, {'status': 'affected', 'version': 'c05ffb693bfb42a48ef3ee88a55b57392984e111', 'lessThan': 'f14aaaa130356ee4adb44de947c098637c70df8f', 'versionType': 'git'}, {'status': 'affected', 'version': 'be346c1a6eeb49d8fda827d2a9522124c2f72f36', 'lessThan': '6ad7532a23bc94076efe9f1486dd7f7493c090ff', 'versionType': 'git'}, {'status': 'affected', 'version': 'be346c1a6eeb49d8fda827d2a9522124c2f72f36', 'lessThan': 'bd73971fad89d5ee4ea0ba9b92d2ea08733c4a64', 'versionType': 'git'}, {'status': 'affected', 'version': 'be346c1a6eeb49d8fda827d2a9522124c2f72f36', 'lessThan': '253ed993e0b36997ec7b04c1ff76103b38241de2', 'versionType': 'git'}, {'status': 'affected', 'version': 'be346c1a6eeb49d8fda827d2a9522124c2f72f36', 'lessThan': 'f9ab30c96b0f00c20c6dac93681bdae3a033d229', 'versionType': 'git'}, {'status': 'affected', 'version': '331d1079d58206ff7dc5518185f800b412f89bc6', 'versionType': 'git'}, {'status': 'affected', 'version': '5.10.221', 'lessThan': '5.10.261', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.162', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.97', 'lessThan': '6.1.178', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.37', 'lessThan': '6.6.145', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.9.8', 'lessThan': '6.10', 'versionType': 'semver'}], 'programFiles': ['fs/ocfs2/journal.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.10'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.10', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/ocfs2/journal.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/253ed993e0b36997ec7b04c1ff76103b38241de2 Added Reference https://git.kernel.org/stable/c/2d80e9c56718435a9c9f5f24dbc954989aead579 Added Reference https://git.kernel.org/stable/c/6ad7532a23bc94076efe9f1486dd7f7493c090ff Added Reference https://git.kernel.org/stable/c/7146d191dae3a8efdb957993fb61a55713186266 Added Reference https://git.kernel.org/stable/c/942b818b396c24c452681803ff291552317d2ef1 Added Reference https://git.kernel.org/stable/c/bd73971fad89d5ee4ea0ba9b92d2ea08733c4a64 Added Reference https://git.kernel.org/stable/c/f14aaaa130356ee4adb44de947c098637c70df8f Added Reference https://git.kernel.org/stable/c/f9ab30c96b0f00c20c6dac93681bdae3a033d229
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