High [CVE-2026-74591] __filemap_add_folio restore index before retrying
This high-severity Red Hat Linux advisory covers CVE-2026-74591.
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Summary
A flaw was found in the Linux kernel. A race condition in the `__filemap_add_folio()` function, responsible for managing memory pages, can occur during specific memory allocation retries.
If another process resolves a memory conflict while the current operation is paused, an incorrect memory address might be used to store data. This can lead to memory corruption, potentially causing system instability (Denial of Service) or allowing an attacker to execute unauthorized code.
Red Hat severity: Moderate — CVSS 7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-367.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
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