CVE-2026-31640

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

References

• https://git.kernel.org/stable/c/9132b1a7bf83b4a8042fffbc99d075b727a16742 ↗
• https://git.kernel.org/stable/c/20386e7f8d97475b8d815873e246423317ec4260 ↗
• https://git.kernel.org/stable/c/b33f5741bb187db8ff32e8f5b96def77cc94dfca ↗