CVE-2026-80885
Received Received - Intake

AFS Out-of-Bounds Message Handler Uncancelled Vulnerability

Publication date: 2026-09-04

Last updated on: 2026-09-04

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: afs: Fix uncancelled rxrpc OOB message handler Fix AFS to cancel its OOB message processing (typically to respond to security challenges). Also move OOB message processing to afs_wq so that it's also waited for and make the OOB handler just return if the net namespace is no longer live.

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Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-05
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-80885
EUVD
EUVD-2026-71515

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux_kernel linux_kernel *

Helpful Resources

Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability in the Linux kernel involves AFS (Andrew File System) not properly cancelling its out-of-band (OOB) message processing. This could allow security challenges to remain unanswered, potentially leading to unauthorized access or data exposure.

Detection Guidance

This vulnerability affects the Linux kernel's AFS (Andrew File System) module. Detection requires checking kernel logs for AFS-related errors or monitoring for unusual OOB (out-of-band) message handling. Commands like 'dmesg | grep afs' or 'journalctl -k | grep afs' may help identify issues.

Impact Analysis

If exploited, this flaw could allow attackers to bypass security mechanisms in AFS, potentially gaining unauthorized access to sensitive data or disrupting file system operations.

Mitigation Strategies

Update the Linux kernel to the latest patched version. Disable the AFS module if not in use with 'modprobe -r afs'. Monitor system logs for AFS-related errors post-update.

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