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CVE-2025-21637 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: udp_port: 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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Hyperlink Resource
https://git.kernel.org/stable/c/0a0966312ac3eedd7f5f2a766ed4702df39a9a65
https://git.kernel.org/stable/c/55627918febdf9d71107a1e68d1528dc591c9a15
https://git.kernel.org/stable/c/5b77d73f3be5102720fb685b9e6900e3500e1096
https://git.kernel.org/stable/c/c10377bbc1972d858eaf0ab366a311b39f8ef1b6
https://git.kernel.org/stable/c/e919197fb8616331f5dc81e4c3cc3d12769cb725

Weakness Enumeration

CWE-ID CWE Name Source

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-21637
NVD Published Date:
01/19/2025
NVD Last Modified:
01/23/2025
Source:
kernel.org