Integer overflow in Linux
CVE-2026-31633
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).
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (50.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.002
Affected products
- Linux — versions 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a, 6.16, 0
- Linux Kernel — versions 6.16, 7.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-31633?
- CVE-2026-31633 is a critical-severity vulnerability in Linux, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2026-04-24.
- How severe is CVE-2026-31633?
- Critical severity. CVSS v3 base score is 9.8 out of 10.