CVE-2026-31589

CRITICAL EPSS 35.5%
Published Apr 24, 20262mo ago · Modified Jun 17, 20261w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Apr 24, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

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 Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
35.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 2

VendorProductVersionRange
linuxlinux_kernel*≥6.14  –  <6.19.14
linuxlinux_kernel*≥7.0  –  <7.0.1

References 4

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

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/615d9bb2ccad42f9e21d837431e401db2e471195
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b667df39d98a7a24be7c2a40ff0863dac1ad2cd7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c330e65ea59c4805d6ab6757c4ddfe8c63acef31
    Patch