{"id":"CVE-2026-98877","title":"kernel: irqchip/gic-v4: Don't advertise VLPIs if no ITS is probed (CVE-2026-98877)","summary":"A flaw was found in the Linux kernel's ARM Generic Interrupt Controller (GIC) driver. When virtual interrupt support is enabled on a system lacking an Interrupt Translation Service (ITS) controller, the kernel fails to disable virtual inte…","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-476","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-23","updated":"2026-10-26","sourceUpdated":"2026-10-26T11:18:55+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98877.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98877.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98877"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2559563"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98877"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98877"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98877.mbox"},{"url":"https://git.kernel.org/stable/c/3e4cae9f1472ba3c9fe87edee24074618b51f537"},{"url":"https://git.kernel.org/stable/c/a2508b8855acc96abe69be73b41b672f1ef12516"},{"url":"https://git.kernel.org/stable/c/e79934064be85fc9a3a6434da857307d8b78e33d"},{"url":"https://git.kernel.org/stable/c/4761493dd663443f7353c184e6fa16e1cb3ac5a1"},{"url":"https://git.kernel.org/stable/c/ab233119a19716b8f33e73ea7e092e0eb353cfbf"},{"url":"https://git.kernel.org/stable/c/c8a911b3b07baa0aeb3dbc4e16a4670bd21bed40"},{"url":"https://git.kernel.org/stable/c/e61654fbc3bc5d07ec9fafe29f33e19b2b5d0fd5"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00179,"epssPercentile":0.074,"ingestedAt":"2026-10-23T13:24:55.583Z","slug":"CVE-2026-98877","body":"## Overview\n\nA flaw was found in the Linux kernel's ARM Generic Interrupt Controller (GIC) driver. When virtual interrupt support is enabled on a system lacking an Interrupt Translation Service (ITS) controller, the kernel fails to disable virtual interrupt advertising. A local user capable of running a virtual machine under these conditions can trigger an unhandled null pointer dereference, causing a kernel crash and resulting in 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 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 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98877.json)\n\n**kernel: irqchip/gic-v4: Don't advertise VLPIs if no ITS is probed** — rated Moderate by Red Hat. Released 2026-10-23, updated 2026-10-26.\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\nFix deferred","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":229286,"id":"CVE-2026-98877","ts":1793019665976,"field":"cvss","old":null,"new":"4.7"},{"seq":229285,"id":"CVE-2026-98877","ts":1793019665976,"field":"severity","old":"none","new":"medium"}]}