What is CVE-2025-21699?

CVE-2025-21699 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 5.10 onward and patched in 5.10.234, 5.15.178, 6.1.128 and others. CVE-2025-21699 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-21699?

CVE-2025-21699 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2025-21699?

Yes, CVE-2025-21699 has been patched. Fixed versions include 5.10.234, 5.15.178, 6.1.128 and others. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-21699 actively exploited?

CVE-2025-21699 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-21699

Medium

In the Linux kernel, the following vulnerability has been resolved: gfs2: Truncate address space when flipping GFS2_DIF_JDATA flag Truncate an inode's address space when flipping the GFS2_DIF_JDATA flag: depending on that flag, the pages in the address space will either use buffer heads or iomap_folio_state structs, and we cannot mix the two.

Package Linux Kernel

Published 2025-02-12

Last modified 2026-01-02

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 5.10 and later are affected. Fixed in 5.10.234, 5.15.178, 6.1.128, 6.6.75, 6.12.12, 6.13.1, 6.14 and their respective stable series.

Affected from

≥ 5.10

Fixed in

✓ 5.10.234 5.10.x ✓ 5.15.178 5.15.x ✓ 6.1.128 6.1.x ✓ 6.6.75 6.6.x ✓ 6.12.12 6.12.x ✓ 6.13.1 6.13.x ✓ 6.14

References

The following references provide additional information about CVE-2025-21699 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
Debian Security
https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
Kernel patch commit
https://git.kernel.org/stable/c/2a40a140e11fec699e128170ccaa98b6b82cb503
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4516febe325342555bb09ca5b396fb816d655821
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4dd57d1f0e9844311c635a7fb39abce4f2ac5a61
Patch

7 patch commits total View all on NVD

Details

CVE ID CVE-2025-21699

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2025-02-12

Modified 2026-01-02

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-21699?

CVE-2025-21699 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.10 onward and has been patched in 5.10.234, 5.15.178, 6.1.128 and others. CVE-2025-21699 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-21699?

CVE-2025-21699 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2025-21699?

Yes — CVE-2025-21699 has been patched. Fixed versions include 5.10.234, 5.15.178, 6.1.128 and others. If you are running Linux kernel 5.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-21699 actively exploited?

No — CVE-2025-21699 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.