TI-2026-24146 Aliases CVE-2026-31589 GHSA-mg7h-q7hw-m596

mm: call ->free_folio() directly in folio_unmap_invalidate()

MEDIUM 42CWE-416Published 2026-04-24 · Updated 2026-08-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Partial Red Hat: 5 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: mm: call ->free_folio() directly in folio_unmap_invalidate() We can only call filemap_free_folio() if we have a reference to (or hold a lock on) the mapping. Otherwise, we've already removed the folio from the mapping so it no longer pins the mapping and the mapping can be removed, causing a use-after-free when accessing mapping->a_ops. Follow the same pattern as __remove_mapping() and load the free_folio function pointer before dropping the lock on the mapping. That lets us make filemap_free_folio() static as this was the only caller outside filemap.c.

Why it matters now

EPSS 0.00444 38th percentileScored 2026-11-07

Fix Partial Linux (Linux): 6.18.27, 6.19.14, 7.0.1 +1Red Hat: 5 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	6.14 and later	6.18.27, 6.19.14, 7.0.1, 7.1	Patch available	CNA

Linux VendorLinux Affected 6.14 and later Fixed in 6.18.27, 6.19.14, 7.0.1, 7.1 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	6.14 to before 6.19.14; 7.0 to before 7.0.1	Vulnerable	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.14 to before 6.19.14; 7.0 to before 7.0.1 Vulnerable ·Linux

Remediation

Fix · CNA Linux (Linux) Fixed in 6.18.27, 6.19.14, 7.0.1, 7.1

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix planned: Will not fix
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 7	Affected	No fix yet
Red Hat Enterprise Linux 8	Affected	No fix yet
Red Hat Enterprise Linux 9	Affected	No fix yet

Not affected: 3 products

Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2026-31589
2026-10-03 Alias added: GHSA-mg7h-q7hw-m596

References

Patch 3

Other 1

https://git.kernel.org/stable/c/efc52947247a21bbf79059539bbbd40f4ea76f00

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Sources

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