CVE-2026-31633
Description
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix integer overflow in rxgk_verify_response() In rxgk_verify_response(), there's a potential integer overflow due to rounding up token_len before checking it, thereby allowing the length check to be bypassed. Fix this by checking the unrounded value against len too (len is limited as the response must fit in a single UDP packet).
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-31633
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-31633.html
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/c1e242beb6b1efc3c286f617e8d940c8fbf2ed41
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/699e52180f4231c257821c037ed5c99d5eb0edb8
Vendor advisory: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 — https://git.kernel.org/stable/c/1f864d9daaf622aeaa774404fd51e7d6a435b046
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 0 |
| debian | bullseye | fixed | 0 |
| debian | forky | fixed | 6.19.13-1 |
| debian | sid | fixed | 6.19.13-1 |
| debian | trixie | fixed | 0 |
| linux-kernel | affected | 6.18.23 | |
| linux-kernel | 6.16 | affected | |
| linux-kernel | 7.0 | affected | |
References
- https://git.kernel.org/stable/c/1f864d9daaf622aeaa774404fd51e7d6a435b046
- https://git.kernel.org/stable/c/699e52180f4231c257821c037ed5c99d5eb0edb8
- https://git.kernel.org/stable/c/c1e242beb6b1efc3c286f617e8d940c8fbf2ed41
- https://www.suse.com/security/cve/CVE-2026-31633.html
- https://security-tracker.debian.org/tracker/CVE-2026-31633
CWEs
CWE-190
Verify integrity in audit chain (admin only). AS-IS.