{"id":"CVE-2026-80779","title":"kernel: net/ionic: avoid OOB TX partner lookup for hwstamp RXQ (CVE-2026-80779)","summary":"A flaw was found in the `net/ionic` component of the Linux kernel. This out-of-bounds write vulnerability occurs because the dedicated hardware timestamp RX queue's index can be used to access memory beyond the bounds of the normal transmi…","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-787","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-04","updated":"2026-10-25","sourceUpdated":"2026-10-25T23:37:01+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80779.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80779.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80779"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2528560"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80779"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80779"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80779.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-80779"},{"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":["csaf","vex","red-hat","cve.org"],"epss":0.00168,"epssPercentile":0.06021,"ingestedAt":"2026-10-19T10:20:54.955Z","slug":"CVE-2026-80779","body":"## Overview\n\nA flaw was found in the `net/ionic` component of the Linux kernel. This out-of-bounds write vulnerability occurs because the dedicated hardware timestamp RX queue's index can be used to access memory beyond the bounds of the normal transmit queue array. An attacker could potentially exploit this to cause memory corruption, leading to system instability or other undefined behavior.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80779.json)\n\n**kernel: net/ionic: avoid OOB TX partner lookup for hwstamp RXQ** — rated Moderate by Red Hat. Released 2026-09-04, updated 2026-10-25.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nFix deferred\n\nWorkarounds / mitigations:\n\n- Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":229459,"id":"CVE-2026-80779","ts":1793019783907,"field":"cvss","old":null,"new":"4.4"},{"seq":229458,"id":"CVE-2026-80779","ts":1793019783907,"field":"severity","old":"none","new":"medium"}]}