{"id":"CVE-2026-80779","title":"net/ionic: avoid OOB TX partner lookup for hwstamp RXQ","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/ionic: avoid OOB TX partner lookup for hwstamp RXQ\n\nThe dedicated hardware timestamp RX queue is allocated with q->index\nequal to lif->ionic->nrxqs_per_lif. The nor…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 8eeed8373e1cca836799bf8e4a05cffa8e444908 < 881a805a8029ba48c0ce81c6674910f8d83f7afb","Linux >= 8eeed8373e1cca836799bf8e4a05cffa8e444908 < 39fc615e355b65b8d43be30da57aa95ae6eaf688","Linux >= 8eeed8373e1cca836799bf8e4a05cffa8e444908 < f3868046e8e2e761d4d943a232bd109ff22a7d5b","Linux >= 8eeed8373e1cca836799bf8e4a05cffa8e444908 < ea081b4435515ac7177eb598a3c0678d1b9e7911","Linux >= 8eeed8373e1cca836799bf8e4a05cffa8e444908 < d92255b405fb6f5acca408239ccd742e0a42c9cb","Linux 6.9"],"published":"2026-09-04","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:43:34.624Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-80779","references":[{"url":"https://git.kernel.org/stable/c/881a805a8029ba48c0ce81c6674910f8d83f7afb"},{"url":"https://git.kernel.org/stable/c/39fc615e355b65b8d43be30da57aa95ae6eaf688"},{"url":"https://git.kernel.org/stable/c/f3868046e8e2e761d4d943a232bd109ff22a7d5b"},{"url":"https://git.kernel.org/stable/c/ea081b4435515ac7177eb598a3c0678d1b9e7911"},{"url":"https://git.kernel.org/stable/c/d92255b405fb6f5acca408239ccd742e0a42c9cb"}],"tags":["cve.org"],"epss":0.00168,"epssPercentile":0.0567,"ingestedAt":"2026-10-19T10:20:54.955Z","slug":"CVE-2026-80779","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet/ionic: avoid OOB TX partner lookup for hwstamp RXQ\n\nThe dedicated hardware timestamp RX queue is allocated with q->index\nequal to lif->ionic->nrxqs_per_lif. The normal txqcqs array only\ncontains the regular queue pairs, so using that index to set rxq->partner\ncan read one entry past txqcqs[] and then write through the derived\npointer.\nOnly link RX/TX partners for normal queue-pair indexes. Leave the hwstamp\nRX queue unpaired, and make the XDP_TX path abort cleanly if an RX queue\nhas no TX partner.\n\n## Affected\n\n- `Linux >= 8eeed8373e1cca836799bf8e4a05cffa8e444908 < 881a805a8029ba48c0ce81c6674910f8d83f7afb`\n- `Linux >= 8eeed8373e1cca836799bf8e4a05cffa8e444908 < 39fc615e355b65b8d43be30da57aa95ae6eaf688`\n- `Linux >= 8eeed8373e1cca836799bf8e4a05cffa8e444908 < f3868046e8e2e761d4d943a232bd109ff22a7d5b`\n- `Linux >= 8eeed8373e1cca836799bf8e4a05cffa8e444908 < ea081b4435515ac7177eb598a3c0678d1b9e7911`\n- `Linux >= 8eeed8373e1cca836799bf8e4a05cffa8e444908 < d92255b405fb6f5acca408239ccd742e0a42c9cb`\n- `Linux 6.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}