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Vulnerability details: VCID-cc41-mkuk-2fgu
Vulnerability ID VCID-cc41-mkuk-2fgu
Aliases CVE-2026-31589
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.
Status Published
Exploitability 0.5
Weighted Severity 5.9
Risk 3.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-825 Expired Pointer Dereference
System Score Found at
cvssv3 6.6 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-31589.json
epss 0.00018 https://api.first.org/data/v1/epss?cve=CVE-2026-31589
epss 0.0004 https://api.first.org/data/v1/epss?cve=CVE-2026-31589
cvssv3.1 7.6 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-31589.json
https://api.first.org/data/v1/epss?cve=CVE-2026-31589
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-31589
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
2461515 https://bugzilla.redhat.com/show_bug.cgi?id=2461515
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-31589.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.04986
EPSS Score 0.00018
Published At April 26, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-25T23:21:31.363547+00:00 Debian Importer Import https://security-tracker.debian.org/tracker/data/json 38.4.0