CVE-2026-74362

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

ext2: fix ignored return value of generic_write_sync()

Fix ext2_dio_write_iter() to propagate the error returned by

generic_write_sync() instead of silently discarding it, which could

cause write(2) to return success to userspace on O_SYNC/O_DSYNC files

even when the sync failed.

The correct pattern, already used in ext2_dax_write_iter() in the same

file and in ext4, xfs, f2fs among others, is:

if (ret > 0)

ret = generic_write_sync(iocb, ret);

Found by Linux Verification Center (linuxtesting.org) with SVACE.

[JK: Reflect also filemap_write_and_wait() return value]

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References