CVE-2026-31633rxrpc: Fix integer overflow in rxgk_verify_response()
Updated under an hour ago ()
Does this affect you?
It affects Linux and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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).
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a builds before 1f864d9daaf622aeaa774404fd51e7d6a435b046; from 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a before c1e242beb6b1efc3c286f617e8d940c8fbf2ed41; from 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a before 699e52180f4231c257821c037ed5c99d5eb0edb8 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.16.1 before 6.18.23; from 6.19 before 6.19.13; 6.16; 7.0; 7.0; 7.0; 7.0; 7.0; and 2 more ranges | NVD |
References
- https://git.kernel.org/stable/c/1f864d9daaf622aeaa774404fd51e7d6a435b046patch
- https://git.kernel.org/stable/c/c1e242beb6b1efc3c286f617e8d940c8fbf2ed41patch
- https://git.kernel.org/stable/c/699e52180f4231c257821c037ed5c99d5eb0edb8patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.