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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-21638 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: auth_enable: avoid using current->nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the reader's/writer's netns vs only from the opener's netns. - current->nsproxy can be NULL in some cases, resulting in an 'Oops' (null-ptr-deref), e.g. when the current task is exiting, as spotted by syzbot [1] using acct(2). The 'net' structure can be obtained from the table->data using container_of(). Note that table->data could also be used directly, but that would increase the size of this fix, while 'sctp.ctl_sock' still needs to be retrieved from 'net' structure.


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/15649fd5415eda664ef35780c2013adeb5d9c695 kernel.org Patch 
https://git.kernel.org/stable/c/1b67030d39f2b00f94ac1f0af11ba6657589e4d3 kernel.org Patch 
https://git.kernel.org/stable/c/7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6 kernel.org Patch 
https://git.kernel.org/stable/c/bd2a2939423566c654545fa3e96a656662a0af9e kernel.org Patch 
https://git.kernel.org/stable/c/c184bc621e3cef03ac9ba81a50dda2dae6a21d36 kernel.org Patch 
https://git.kernel.org/stable/c/cf387cdebfaebae228dfba162f94c567a67610c3 kernel.org
https://git.kernel.org/stable/c/dc583e7e5f8515ca489c0df28e4362a70eade382 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  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

7 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-21638
NVD Published Date:
01/19/2025
NVD Last Modified:
05/12/2026
Source:
kernel.org