CVE-2026-80779
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.
Affected versions
Linux kernel versions
6.9
and later are affected. Fixed in
6.12.106,
6.18.47,
7.1.11,
7.2.1,
7.3
and their respective stable series.
References
5 totalFrequently asked questions
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What is CVE-2026-80779?
CVE-2026-80779 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.9 onward and has been patched in 6.12.106, 6.18.47, 7.1.11 and others. CVE-2026-80779 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-80779?
Yes. CVE-2026-80779 has been patched. Fixed versions include 6.12.106, 6.18.47, 7.1.11 and others. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-80779 actively exploited?
No. CVE-2026-80779 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.