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Linux CVE-2026-80779

| EUVDEUVD-2026-71422
2026-09-04 Linux GHSA-5565-rhhw-mpqw

Lifecycle Timeline

2
Patch available
Sep 04, 2026 - 17:17 EUVD
CVE Published
Sep 04, 2026 - 15:12 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

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.

Analysis

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. …

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CVE-2026-80779 vulnerability details – vuln.today

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