Linux Kernel up to 6.13.0 vfio memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.13.0. Affected by this vulnerability is an unknown functionality of the component vfio. Performing a manipulation results in memory corruption. This vulnerability is cataloged as CVE-2025-21687. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.13.0. This affects some unknown processing of the component vfio. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: vfio/platform: check the bounds of read/write syscalls count and offset are passed from user space and not checked, only offset is capped to 40 bits, which can be used to read/write out of bounds of the device.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2025-21687 since 12/29/2024. The exploitability is told to be easy. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around 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 f21636f24b6786c8b13f1af4319fa75ffcf17f38/d19a8650fd3d7aed8d1af1d9a77f979a8430eba1/92340e6c5122d823ad064984ef7513eba9204048/6bcb8a5b70b80143db9bf12dfa7d53636f824d53/c981c32c38af80737a2fedc16e270546d139ccdd/a20fcaa230f7472456d12cf761ed13938e320ac3/665cfd1083866f87301bbd232cb8ba48dcf4acce/ce9ff21ea89d191e477a02ad7eabf4f996b80a69 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-2025-0309). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • RESF Rocky Linux
  • Dell NetWorker
  • Dell Avamar
  • Open Source Linux Kernel
  • Dell PowerProtect Data Domain

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.7

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

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Memory corruption
CWE: 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: f21636f24b6786c8b13f1af4319fa75ffcf17f38/d19a8650fd3d7aed8d1af1d9a77f979a8430eba1/92340e6c5122d823ad064984ef7513eba9204048/6bcb8a5b70b80143db9bf12dfa7d53636f824d53/c981c32c38af80737a2fedc16e270546d139ccdd/a20fcaa230f7472456d12cf761ed13938e320ac3/665cfd1083866f87301bbd232cb8ba48dcf4acce/ce9ff21ea89d191e477a02ad7eabf4f996b80a69

Timelineinfo

12/29/2024 🔍
02/10/2025 +43 days 🔍
02/10/2025 +0 days 🔍
02/17/2026 +372 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-21687 (🔍)
GCVE (CVE): GCVE-0-2025-21687
GCVE (VulDB): GCVE-100-295119
CERT Bund: WID-SEC-2025-0309 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 02/10/2025 17:21
Updated: 02/17/2026 03:31
Changes: 02/10/2025 17:21 (58), 02/17/2025 13:22 (1), 02/21/2025 19:08 (11), 03/02/2025 13:39 (2), 10/09/2025 14:41 (7), 02/17/2026 03:31 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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