CVE-2025-21635 (GCVE-0-2025-21635)
Vulnerability from cvelistv5
Published
2025-01-19 10:17
Modified
2025-10-01 19:57
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: rds: sysctl: rds_tcp_{rcv,snd}buf: 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 per-netns structure can be obtained from the table->data using container_of(), then the 'net' one can be retrieved from the listen socket (if available).
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7f5611cbc4871c7fb1ad36c2e5a9edad63dca95cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/de8d6de0ee27be4b2b1e5b06f04aeacbabbba492Patch
Impacted products
Vendor Product Version
Linux Linux Version: c6a58ffed53612be86b758df1cdb0b0f4305e9cb
Version: c6a58ffed53612be86b758df1cdb0b0f4305e9cb
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   Linux Linux Version: 4.6
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