CVE-2026-64031

kernel: erofs: fix managed cache race for unaligned extents

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Severity

Moderate

Red Hat Product Security

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CVSS

Review impact separately from score.

Published · July 19, 2026

Updated · October 20, 2026

Description

A flaw was found in the Linux kernel's erofs filesystem. A race condition exists when processing unaligned compressed extents, which can cause a managed memory page (folio) to be incorrectly added to the page cache multiple times. This inconsistency in memory management could allow a local attacker to trigger a system crash, leading to a denial of service (DoS).

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition