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.
How to fix
- linux linux_kernel6.18.23, 6.19.13 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 6.16.1 ≤ v < 6.18.23, 6.19 ≤ v < 6.19.13, 6.16, 7.0 | 6.18.23, 6.19.13 |
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