CVE-2025-21691

mediumpriority · track · 22OT risk · elevatedEPSS 0.002 · 10 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.20% (10th) EPSS

CVSS 5.5 · medium

Is it mine?

55 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

In the Linux kernel, the following vulnerability has been resolved: cachestat: fix page cache statistics permission checking When the 'cachestat()' system call was added in commit cf264e1329fb ("cachestat: implement cachestat syscall"), it was meant to be a much more convenient (and performant) version of mincore() that didn't need mapping things into the user virtual address space in order to work. But it ended up missing the "check for writability or ownership" fix for mincore(), done in commit 134fca9063ad ("mm/mincore.c: make mincore() more conservative"). This just adds equivalent logic to 'cachestat()', modified for the file context (rather than vma).

cvss

Technical severity, 0–10. One row per scoring source.

7.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.1–7.1

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 3.6

v3.17.1highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.15.1mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-275USCWE-863US

affected products (55)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Dell Avamarall versionscert_bundDEcpe:/a:dell:avamar:-
Dell NetWorker virtualall versionscert_bundDEcpe:/a:dell:networker:virtual
Dell PowerProtect Data Domain <7.10.1.70all versionscert_bundDE
Dell PowerProtect Data Domain <7.13.1.40all versionscert_bundDE
Dell PowerProtect Data Domain <8.3.1.10all versionscert_bundDE
Dell PowerProtect Data Domain <8.4.0.0all versionscert_bundDE
IBM DataPower Gatewayall versionscert_bundDEcpe:/a:ibm:datapower_gateway:-
Open Source Linux Kernel <5.10.234all versionscert_bundDE
Open Source Linux Kernel <5.15.178all versionscert_bundDE
Open Source Linux Kernel <5.4.290all versionscert_bundDE
Open Source Linux Kernel <6.1.128all versionscert_bundDE
Open Source Linux Kernel <6.12.12all versionscert_bundDE
Open Source Linux Kernel <6.13.1all versionscert_bundDE
Open Source Linux Kernel <6.14-rc1all versionscert_bundDE
Open Source Linux Kernel <6.6.75all versionscert_bundDE
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-

showing 20 of 55

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-0309Linux Kernel: Mehrere SchwachstellenDeutsch2025-02-10csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen und um seine Privilegien zu eskalieren.
WID-SEC-W-2026-2253IBM Security Verify Access: Mehrere SchwachstellenDeutsch2026-07-08csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM Security Verify Access ausnutzen, um erweiterte Berechtigungen zu erlangen, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, sensible Informationen offenzulegen und andere, nicht näher bezeichnete Angriffe durchzuführen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2025-02-10modified 2026-06-17

references (13)

External citations — patches, advisories, analysis.

scry

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