Vulnerability Description
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).
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.6, < 6.12.10 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/7f5611cbc4871c7fb1ad36c2e5a9edad63dca95cPatch
- https://git.kernel.org/stable/c/de8d6de0ee27be4b2b1e5b06f04aeacbabbba492Patch
FAQ
What is CVE-2025-21635?
CVE-2025-21635 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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' ...
How severe is CVE-2025-21635?
CVE-2025-21635 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-21635?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.