Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-31676

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
25/04/2026
Last modified:
27/04/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> rxrpc: only handle RESPONSE during service challenge<br /> <br /> Only process RESPONSE packets while the service connection is still in<br /> RXRPC_CONN_SERVICE_CHALLENGING. Check that state under state_lock before<br /> running response verification and security initialization, then use a local<br /> secured flag to decide whether to queue the secured-connection work after<br /> the state transition. This keeps duplicate or late RESPONSE packets from<br /> re-running the setup path and removes the unlocked post-transition state<br /> test.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH

References to Advisories, Solutions, and Tools