CVE-2026-80779
Received Received - Intake

Linux Kernel Out-of-Bounds TX Partner Lookup in Ionic Driver

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: net/ionic: avoid OOB TX partner lookup for hwstamp RXQ The dedicated hardware timestamp RX queue is allocated with q->index equal to lif->ionic->nrxqs_per_lif. The normal txqcqs array only contains the regular queue pairs, so using that index to set rxq->partner can read one entry past txqcqs[] and then write through the derived pointer. Only link RX/TX partners for normal queue-pair indexes. Leave the hwstamp RX queue unpaired, and make the XDP_TX path abort cleanly if an RX queue has no TX partner.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-09-04
Last Modified
2026-09-04
Generated
2026-09-04
AI Q&A
2026-09-04
EPSS Evaluated
N/A
NVD
CVE-2026-80779
EUVD
EUVD-2026-71422

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability in the Linux kernel involves a buffer overflow in the net/ionic driver. It occurs when the hardware timestamp RX queue is incorrectly paired with a TX queue. The RX queue index exceeds the bounds of the TX queue array, causing out-of-bounds memory access. This can lead to undefined behavior or crashes.

Detection Guidance

This vulnerability affects the Linux kernel's net/ionic driver. Detection requires checking kernel logs for OOB (out-of-bounds) access errors related to TX partner lookup in the ionic driver. Use commands like dmesg | grep ionic or journalctl -k | grep ionic to search for related errors.

Impact Analysis

This vulnerability could cause system instability, crashes, or potential privilege escalation if exploited. It may disrupt network operations relying on the ionic driver, leading to service interruptions or data corruption.

Compliance Impact

This vulnerability does not directly affect compliance with standards like GDPR or HIPAA. It is a Linux kernel issue related to network hardware timestamp handling, which does not involve data privacy or security controls typically governed by these regulations.

Mitigation Strategies

Update the Linux kernel to a patched version that resolves this issue. Monitor kernel updates from your distribution vendor and apply them promptly. Avoid manual workarounds as they may introduce other issues.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-80779. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart