CVE-2026-31676rxrpc: only handle RESPONSE during service challenge
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: rxrpc: only handle RESPONSE during service challenge Only process RESPONSE packets while the service connection is still in RXRPC_CONN_SERVICE_CHALLENGING. Check that state under state_lock before running response verification and security initialization, then use a local secured flag to decide whether to queue the secured-connection work after the state transition. This keeps duplicate or late RESPONSE packets from re-running the setup path and removes the unlocked post-transition state test.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 17926a79320afa9b95df6b977b40cca6d8713cea before a1a8efde03a40b6c658d580e96644d9b9a2a0d3a; 17926a79320afa9b95df6b977b40cca6d8713cea builds before 6c3a0fbdafef8316e34ae22333e317a341e737cd; 17926a79320afa9b95df6b977b40cca6d8713cea builds before 0afdfd4941c1b60a1f5c361760daa970edca60cd; from 17926a79320afa9b95df6b977b40cca6d8713cea before a6bcf8010af093fe04f7100562e9542ab7882585; 17926a79320afa9b95df6b977b40cca6d8713cea builds before 29b44d904dceb832be880def08b8cb17a0aba91c; from 17926a79320afa9b95df6b977b40cca6d8713cea before d0035e634dae83237ab7f5681eb52b2f65d0ceb8; 17926a79320afa9b95df6b977b40cca6d8713cea builds before 03fd2ef73cb4ffd0af100a95b634af54f474414e; from 17926a79320afa9b95df6b977b40cca6d8713cea before c43ffdcfdbb5567b1f143556df8a04b4eeea041c | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 2.6.22 before 6.6.136; from 6.7 before 6.12.84; from 6.13 before 6.18.23; from 6.19 before 6.19.13; 7.0; 7.0; 7.0; 7.0; and 3 more ranges | NVD |
References
- https://git.kernel.org/stable/c/a1a8efde03a40b6c658d580e96644d9b9a2a0d3a
- https://git.kernel.org/stable/c/6c3a0fbdafef8316e34ae22333e317a341e737cd
- https://git.kernel.org/stable/c/0afdfd4941c1b60a1f5c361760daa970edca60cd
- https://git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585patch
- https://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91cpatch
- https://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8patch
- https://git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414epatch
- https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041cpatch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
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.