{"id":"CVE-2026-81002","title":"kernel: xdp: fix zero-copy frame layout (CVE-2026-81002)","summary":"A flaw was found in the Linux kernel's XDP (eXpress Data Path) component. Incorrect handling of zero-copy frame layout in the `xdp_convert_zc_to_xdp_frame()` function can allow an AF_XDP zero-copy packet, when redirected through `cpumap`, …","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":"CWE-787","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-14","sourceUpdated":"2026-09-14T20:35:54+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81002.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81002.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-81002"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532133"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-81002"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81002"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-81002.mbox"},{"url":"https://git.kernel.org/stable/c/dcb6db9ca6515fcd3e00c93ec5e27dc7a0a7012f"},{"url":"https://git.kernel.org/stable/c/22092730129077c302d8c947bbe0876f0280c528"},{"url":"https://git.kernel.org/stable/c/ced3e18cd9b9caf630aaa1e1eac305f5192ba896"},{"url":"https://git.kernel.org/stable/c/6de17275b3ccdf9887568b07e54da2e3597217cf"},{"url":"https://git.kernel.org/stable/c/444216dacdbebd3e52d5e704facafbb230da09e9"},{"url":"https://git.kernel.org/stable/c/15d1f3c0dbe7a740f779337deb39f23cd8d002c8"},{"url":"https://git.kernel.org/stable/c/68d7cc5512238693670fc19c7a615df631e10edf"},{"url":"https://git.kernel.org/stable/c/71283aaa6c65b3cec84caf1dc78560985737641f"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00521,"epssPercentile":0.4304,"scores":{"vendor":7,"cna":9.8},"ingestedAt":"2026-09-14T15:23:07.454Z","slug":"CVE-2026-81002","body":"## Overview\n\nA flaw was found in the Linux kernel's XDP (eXpress Data Path) component. Incorrect handling of zero-copy frame layout in the `xdp_convert_zc_to_xdp_frame()` function can allow an AF_XDP zero-copy packet, when redirected through `cpumap`, to cause a memory corruption. This can lead to a slab-out-of-bounds error, resulting in a kernel panic and a Denial of Service (DoS) for the system.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81002.json)\n\n**kernel: xdp: fix zero-copy frame layout** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 8\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 8\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\n## Remediation\n\nAffected","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":204142,"id":"CVE-2026-81002","ts":1789490232167,"field":"cvss","old":"9.8","new":"7"},{"seq":204141,"id":"CVE-2026-81002","ts":1789490232167,"field":"severity","old":"critical","new":"high"},{"seq":183797,"id":"CVE-2026-81002","ts":1789356677433,"field":"cvss","old":"9.8","new":"5.9"},{"seq":183796,"id":"CVE-2026-81002","ts":1789356677433,"field":"severity","old":"critical","new":"medium"},{"seq":153194,"id":"CVE-2026-81002","ts":1789285349496,"field":"cvss","old":null,"new":"9.8"},{"seq":153193,"id":"CVE-2026-81002","ts":1789285349496,"field":"severity","old":"none","new":"critical"},{"seq":147752,"id":"CVE-2026-81002","ts":1789270212153,"field":"cvss","old":null,"new":"5.9"},{"seq":147751,"id":"CVE-2026-81002","ts":1789270212153,"field":"severity","old":"none","new":"medium"},{"seq":109504,"id":"CVE-2026-81002","ts":1789183732188,"field":"cvss","old":null,"new":"5.9"},{"seq":109503,"id":"CVE-2026-81002","ts":1789183732188,"field":"severity","old":"none","new":"medium"}]}