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CVE-2025-21640 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: cookie_hmac_alg: 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, as this is the only member needed from the 'net' structure, but that would increase the size of this fix, to use '*data' everywhere 'net->sctp.sctp_hmac_alg' is used.


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/03ca51faba2b017bf6c90e139434c4117d0afcdc
https://git.kernel.org/stable/c/1031462a944ba0fa83c25ab1111465f8345b5589
https://git.kernel.org/stable/c/3cd0659deb9c03535fd61839e91d4d4d3e51ac71
https://git.kernel.org/stable/c/86ddf8118123cb58a0fb8724cad6979c4069065b
https://git.kernel.org/stable/c/ad673e514b2793b8d5902f6ba6ab7e890dea23d5
https://git.kernel.org/stable/c/ea62dd1383913b5999f3d16ae99d411f41b528d4
https://git.kernel.org/stable/c/f0bb3935470684306e4e04793a20ac4c4b08de0b

Weakness Enumeration

CWE-ID CWE Name Source

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-21640
NVD Published Date:
01/19/2025
NVD Last Modified:
02/02/2025
Source:
kernel.org