{"id":"CVE-2026-80818","title":"kernel: iommu/tegra241-cmdqv: Fix CMD_SYNC use-after-free on teardown (CVE-2026-80818)","summary":"A flaw was found in the Linux kernel's iommu/tegra241-cmdqv driver. This vulnerability, a use-after-free, occurs when the system attempts to deinitialize a virtual interface during device teardown, accessing memory that has already been re…","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-416","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":"2026-10-25T23:14:19+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80818.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80818.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80818"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2528541"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80818"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80818"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80818.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-80818"},{"url":"https://git.kernel.org/stable/c/d2ab08437e913d9e4dda4dfd0d327446ec8717fc"},{"url":"https://git.kernel.org/stable/c/a94309bb99eaf0c6a2ace4927864486d19458eb5"},{"url":"https://git.kernel.org/stable/c/5994617e09ee6016c1b094f29d9c85cac944b477"},{"url":"https://git.kernel.org/stable/c/9ff145a25c5c8a26b06ef7cf558fb536b18bba6d"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00209,"epssPercentile":0.10962,"ingestedAt":"2026-10-19T09:16:01.505Z","slug":"CVE-2026-80818","body":"## Overview\n\nA flaw was found in the Linux kernel's iommu/tegra241-cmdqv driver. This vulnerability, a use-after-free, occurs when the system attempts to deinitialize a virtual interface during device teardown, accessing memory that has already been released. A local attacker or a malicious device could exploit this to trigger a kernel panic, leading to a system crash and a Denial of Service (DoS).\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-2026-80818.json)\n\n**kernel: iommu/tegra241-cmdqv: Fix CMD_SYNC use-after-free on teardown** — 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\nAffected\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":229465,"id":"CVE-2026-80818","ts":1793019786266,"field":"cvss","old":null,"new":"4.4"},{"seq":229464,"id":"CVE-2026-80818","ts":1793019786266,"field":"severity","old":"none","new":"medium"}]}