CVE-2026-31589

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/615d9bb2ccad42f9e21d837431e401db2e471195	Patch
https://git.kernel.org/stable/c/b667df39d98a7a24be7c2a40ff0863dac1ad2cd7	Patch
https://git.kernel.org/stable/c/c330e65ea59c4805d6ab6757c4ddfe8c63acef31	Patch
https://git.kernel.org/stable/c/efc52947247a21bbf79059539bbbd40f4ea76f00

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2026-04-24 15:16

Updated : 2026-06-17 10:34

NVD link : CVE-2026-31589

Mitre link : CVE-2026-31589

CVE.ORG link : CVE-2026-31589

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-416

Use After Free

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