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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.

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Hyperlink Resource
https://git.kernel.org/stable/c/10c869a52f266e40f548cc3c565d14930a5edafc
https://git.kernel.org/stable/c/15649fd5415eda664ef35780c2013adeb5d9c695
https://git.kernel.org/stable/c/1b67030d39f2b00f94ac1f0af11ba6657589e4d3
https://git.kernel.org/stable/c/7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6
https://git.kernel.org/stable/c/bd2a2939423566c654545fa3e96a656662a0af9e
https://git.kernel.org/stable/c/c184bc621e3cef03ac9ba81a50dda2dae6a21d36
https://git.kernel.org/stable/c/dc583e7e5f8515ca489c0df28e4362a70eade382

Weakness Enumeration

CWE-ID CWE Name Source

Change History

3 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-21638
NVD Published Date:
01/19/2025
NVD Last Modified:
02/02/2025
Source:
kernel.org