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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-21666 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: vsock: prevent null-ptr-deref in vsock_*[has_data|has_space] Recent reports have shown how we sometimes call vsock_*_has_data() when a vsock socket has been de-assigned from a transport (see attached links), but we shouldn't. Previous commits should have solved the real problems, but we may have more in the future, so to avoid null-ptr-deref, we can return 0 (no space, no data available) but with a warning. This way the code should continue to run in a nearly consistent state and have a warning that allows us to debug future problems.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://cert-portal.siemens.com/productcert/html/ssa-265688.html siemens-SADP
https://git.kernel.org/stable/c/91751e248256efc111e52e15115840c35d85abaf kernel.org Patch 
https://git.kernel.org/stable/c/9e5fed46ccd2c34c5fa5a9c8825ce4823fdc853e kernel.org Patch 
https://git.kernel.org/stable/c/b52e50dd4fabd12944172bd486a4f4853b7f74dd kernel.org Patch 
https://git.kernel.org/stable/c/bc9c49341f9728c31fe248c5fbba32d2e81a092b kernel.org Patch 
https://git.kernel.org/stable/c/c23d1d4f8efefb72258e9cedce29de10d057f8ca kernel.org Patch 
https://git.kernel.org/stable/c/daeac89cdb03d30028186f5ff7dc26ec8fa843e7 kernel.org Patch 
https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html CVE
https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html CVE

Weakness Enumeration

CWE-ID CWE Name Source
CWE-476 NULL Pointer Dereference cwe source acceptance level NIST   CISA-ADP  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

6 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-21666
NVD Published Date:
01/31/2025
NVD Last Modified:
05/12/2026
Source:
kernel.org