Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-74362

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Main Vulnerability Database Vulnerabilities #VU142835

Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-74362

Published: August 15, 2026


Vulnerability identifier: #VU142835
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-74362
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to cause incorrect success status reporting for failed synchronous writes.

The vulnerability exists due to improper check for unusual or exceptional conditions in ext2_dio_write_iter() in fs/ext2/file.c when handling direct I/O writes to O_SYNC/O_DSYNC files. A local user can trigger a failed sync during a write operation to cause incorrect success status reporting for failed synchronous writes.

The issue affects error propagation from generic_write_sync() and may also involve filemap_write_and_wait_range() handling.


Affected software

Linux kernel
Ubuntu
linux-gcp-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)

How to mitigate CVE-2026-74362

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-gcp-7.0 (Ubuntu package) - addressed in versions 7.0.0-38.38~24.04.4, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14~24.04.1
linux-azure-7.0 (Ubuntu package) - addressed in versions 7.0.0-1016.16~24.04.1, 7.0.0-1017.17~24.04.1

External References

Related Security Bulletins