SEPTEMBER 7, 2026
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Case File

CVE-2026-64156

MEDIUM · CVSS 5.5 EPSS 0.12%

Source: NVD + CISA KEV + EPSS · Published 2026-07-19 · Last synced 2026-08-18

CyberRota Analysis

AI-Generated

The vulnerability affects the Linux kernel's handling of write operations in the netfs and AFS subsystems, specifically related to lock contention during directory and link write operations. If exploited, this could lead to inconsistencies in data writes, potentially compromising data integrity. Organizations utilizing Linux systems with these subsystems should prioritize this fix to ensure reliable data handling and prevent potential data corruption.

CVE
CVE-2026-64156
Severity
MEDIUM
CVSS
5.5
EPSS
0.12%
Linux

Original NVD Description

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.

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