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CVE-2026-80779

net/ionic: avoid OOB TX partner lookup for hwstamp RXQ PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
Linux / Linuxaffected 8eeed8373e1cca836799bf8e4a05cffa8e444908 before 881a805a8029ba48c0ce81c6674910f8d83f7afb; affected 8eeed8373e1cca836799bf8e4a05cffa8e444908 before 39fc615e355b65b8d43be30da57aa95ae6eaf688; affected 8eeed8373e1cca836799bf8e4a05cffa8e444908 before f3868046e8e2e761d4d943a232bd109ff22a7d5b; affected 8eeed8373e1cca836799bf8e4a05cffa8e444908 before ea081b4435515ac7177eb598a3c0678d1b9e7911; affected 8eeed8373e1cca836799bf8e4a05cffa8e444908 before d92255b405fb6f5acca408239ccd742e0a42c9cb
Linux / Linuxaffected 6.9; unaffected 0 before 6.9; unaffected 6.12.106 through 6.12.*; unaffected 6.18.47 through 6.18.*; unaffected 7.1.11 through 7.1.*; unaffected 7.2.1 through 7.2.*; unaffected 7.3 through *

CWE

No CWE identifiers supplied.

References