Linux Kernel up to 6.13.7 fs/netfs/read_collect prev_donated denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.13.7 and classified as critical. Affected is an unknown function of the file fs/netfs/read_collect. The manipulation of the argument prev_donated leads to denial of service. This vulnerability is referenced as CVE-2025-21988. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Linux Kernel up to 6.13.7. This issue affects an unknown part of the file fs/netfs/read_collect. The manipulation of the argument prev_donated with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: fs/netfs/read_collect: add to next->prev_donated If multiple subrequests donate data to the same "next" request (depending on the subrequest completion order), each of them would overwrite the `prev_donated` field, causing data corruption and a BUG() crash ("Can't donate prior to front").

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2025-21988 since 12/29/2024. Technical details are known, but no exploit is available.

Upgrading to version 6.13.8 eliminates this vulnerability. Applying the patch e25cec3b76aba47a49138d2162fc809c6cd49c9e 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 vulnerability database at CERT Bund (WID-SEC-2025-0698). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Open Source Linux Kernel
  • SolarWinds Security Event Manager
  • Dell Secure Connect Gateway

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.13.8
Patch: e25cec3b76aba47a49138d2162fc809c6cd49c9e

Timelineinfo

12/29/2024 🔍
04/02/2025 +93 days 🔍
04/02/2025 +0 days 🔍
02/16/2026 +320 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-21988 (🔍)
GCVE (CVE): GCVE-0-2025-21988
GCVE (VulDB): GCVE-100-303005
CERT Bund: WID-SEC-2025-0698 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 04/02/2025 15:29
Updated: 02/16/2026 17:51
Changes: 04/02/2025 15:29 (59), 07/19/2025 23:11 (7), 10/10/2025 19:55 (1), 02/16/2026 17:51 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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