Linux Kernel up to 6.13.0 gfs2 buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.13.0. Impacted is an unknown function of the component gfs2. Executing a manipulation can lead to buffer overflow. This vulnerability appears as CVE-2025-21699. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.13.0. This vulnerability affects an unknown function of the component gfs2. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2025-21699 since 12/29/2024. The exploitation appears to be easy. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 02/17/2026).

The vulnerability scanner Nessus provides a plugin with the ID 216985 (Debian dla-4076 : linux-config-6.1 - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.290, 5.10.234, 5.15.178, 6.1.128, 6.6.75, 6.12.12, 6.13.1 or 6.14-rc1 eliminates this vulnerability. Applying the patch 2b0bd5051ad1c1e9ef4879f18e15a7712c974f3e/8c41abc11aa8438c9ed2d973f97e66674c0355df/4e3ded34f3f3c9d7ed2aac7be8cf51153646574a/2a40a140e11fec699e128170ccaa98b6b82cb503/4dd57d1f0e9844311c635a7fb39abce4f2ac5a61/4516febe325342555bb09ca5b396fb816d655821/5bb1fd0855bb0abc7d97e44758d6ffed7882d2d0/7c9d9223802fbed4dee1ae301661bf346964c9d2 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (216985) and CERT Bund (WID-SEC-2025-0362). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 216985
Nessus Name: Debian dla-4076 : linux-config-6.1 - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.4.290/5.10.234/5.15.178/6.1.128/6.6.75/6.12.12/6.13.1/6.14-rc1
Patch: 2b0bd5051ad1c1e9ef4879f18e15a7712c974f3e/8c41abc11aa8438c9ed2d973f97e66674c0355df/4e3ded34f3f3c9d7ed2aac7be8cf51153646574a/2a40a140e11fec699e128170ccaa98b6b82cb503/4dd57d1f0e9844311c635a7fb39abce4f2ac5a61/4516febe325342555bb09ca5b396fb816d655821/5bb1fd0855bb0abc7d97e44758d6ffed7882d2d0/7c9d9223802fbed4dee1ae301661bf346964c9d2

Timelineinfo

12/29/2024 🔍
02/12/2025 +45 days 🔍
02/12/2025 +0 days 🔍
02/17/2026 +370 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-21699 (🔍)
GCVE (CVE): GCVE-0-2025-21699
GCVE (VulDB): GCVE-100-295498
CERT Bund: WID-SEC-2025-0362 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 02/12/2025 15:18
Updated: 02/17/2026 03:23
Changes: 02/12/2025 15:18 (58), 02/14/2025 16:21 (12), 03/02/2025 14:02 (2), 02/17/2026 03:23 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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