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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-72163 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/253ed993e0b36997ec7b04c1ff76103b38241de2 kernel.org
https://git.kernel.org/stable/c/2d80e9c56718435a9c9f5f24dbc954989aead579 kernel.org
https://git.kernel.org/stable/c/6ad7532a23bc94076efe9f1486dd7f7493c090ff kernel.org
https://git.kernel.org/stable/c/7146d191dae3a8efdb957993fb61a55713186266 kernel.org
https://git.kernel.org/stable/c/942b818b396c24c452681803ff291552317d2ef1 kernel.org
https://git.kernel.org/stable/c/bd73971fad89d5ee4ea0ba9b92d2ea08733c4a64 kernel.org
https://git.kernel.org/stable/c/f14aaaa130356ee4adb44de947c098637c70df8f kernel.org
https://git.kernel.org/stable/c/f9ab30c96b0f00c20c6dac93681bdae3a033d229 kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-72163
NVD Published Date:
08/15/2026
NVD Last Modified:
08/15/2026
Source:
kernel.org