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CVE-2026-64156

netfs, afs: Fix write skipping in dir/link writepages PUBLISHED

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: netfs, afs: Fix write skipping in dir/link writepages Fix netfs_write_single() and afs_single_writepages() to better handle a write that would be skipped due to lock contention and WB_SYNC_NONE by returning 1 from netfs_write_single() if it skipped and making afs_single_writepages() skip also. If a skip occurs, the inode must be re-marked as the VFS may have cleared the mark. This is really only theoretical for directories in netfs_write_single() as the only path to that is through afs_single_writepages() that takes the ->validate_lock around it, thereby serialising it.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 6dd80936618c4ff852d4db73aca400351d9bd9f0 before 77bb293049d61e04c12b24ebbffafaf5ab36af90; affected 6dd80936618c4ff852d4db73aca400351d9bd9f0 before f91e10435c0dd37c48b1b25e6236284f656ddc0c; affected 6dd80936618c4ff852d4db73aca400351d9bd9f0 before 9871938f99cc6cb266a77265491660e2375271f5
Linux / Linuxaffected 6.14; unaffected 0 before 6.14; unaffected 6.18.34 through 6.18.*; unaffected 7.0.11 through 7.0.*; unaffected 7.1 through *

CWE

No CWE identifiers supplied.

References