Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix use of wrong skb when comparing queued RESP challenge serial In rxrpc_post_response(), the code should be comparing the challenge serial number from the cached response before deciding to switch to a newer response, but looks at the newer packet private data instead, rendering the comparison always false. Fix this by switching to look at the older packet. Fix further[1] to substitute the new packet in place of the old one if newer and also to release whichever we don't use.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.16.1, < 6.18.23 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/20386e7f8d97475b8d815873e246423317ec4260Patch
- https://git.kernel.org/stable/c/9132b1a7bf83b4a8042fffbc99d075b727a16742Patch
- https://git.kernel.org/stable/c/b33f5741bb187db8ff32e8f5b96def77cc94dfcaPatch
FAQ
What is CVE-2026-31640?
CVE-2026-31640 is a vulnerability with a CVSS score of 7.5 (HIGH). In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix use of wrong skb when comparing queued RESP challenge serial In rxrpc_post_response(), the code should be comparing the...
How severe is CVE-2026-31640?
CVE-2026-31640 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31640?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.