CVE-2026-31676 Details
Description
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.
A vulnerability in the Linux kernel's RxRPC implementation has been addressed. The issue involved improper handling of RESPONSE packets during the service challenge phase of the connection. Previously, RESPONSE packets could be processed after the connection had transitioned out of the challenging state, potentially leading to duplicate or delayed packets re-executing the connection setup process. The vulnerability has been fixed by ensuring that RESPONSE packets are only processed while the connection is still in the RXRPC_CONN_SERVICE_CHALLENGING state. The state is now properly checked under a lock before verifying the response and initializing security, preventing late RESPONSE packets from disrupting the connection management.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been fixed. The specific commit addressing this issue is available in the Linux kernel stable tree.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 2.6.22, < 6.6.136 >= 6.7, < 6.12.84 >= 6.13, < 6.18.23 >= 6.19, < 6.19.13 7.0 rc1 7.0 rc2 7.0 rc3 7.0 rc4 7.0 rc5 7.0 rc6 7.0 rc7 |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 1, 2026 | CVE Modified | kernel.org |
| May 6, 2026 | Initial Analysis | [email protected] |
| Apr 27, 2026 | CVE Modified | kernel.org |
| Apr 27, 2026 | CVE Modified | kernel.org |
| Apr 25, 2026 | New CVE Received | kernel.org |