{"id":"CVE-2026-98854","title":"kernel: of/overlay: only treat a positive changeset id as registered (CVE-2026-98854)","summary":"A flaw was found in the Linux kernel's Device Tree overlay subsystem. When applying an overlay fails during identifier allocation, the error cleanup routine incorrectly treats negative error codes as valid identifiers. A local user could t…","severity":"medium","cvss":4.1,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-476","vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","affected":["enterprise_linux 10","enterprise_linux 8","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-23","sourceUpdated":"2026-10-23T15:23:03+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98854.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98854.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98854"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555233"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98854"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98854"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98854.mbox"},{"url":"https://git.kernel.org/stable/c/cc688475c56d34a2b584141f9544cbe23360080d"},{"url":"https://git.kernel.org/stable/c/c08a54df9d33dcd6ff089adc9434b2c008af3a39"},{"url":"https://git.kernel.org/stable/c/0d1525fdcd3355672b7485d61e55df6824ab5ad1"},{"url":"https://git.kernel.org/stable/c/c875407c34dadaef0599834ad9c815f4c9f50d15"},{"url":"https://git.kernel.org/stable/c/44081d708b5b885487bac792db78324b7b4c267d"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00156,"epssPercentile":0.04712,"ingestedAt":"2026-10-18T16:47:32.461Z","slug":"CVE-2026-98854","body":"## Overview\n\nA flaw was found in the Linux kernel's Device Tree overlay subsystem. When applying an overlay fails during identifier allocation, the error cleanup routine incorrectly treats negative error codes as valid identifiers. A local user could trigger this vulnerability during resource allocation failures, causing an uninitialized list operation and a null pointer dereference that crashes the kernel, 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 OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat OpenShift Container Platform 4 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98854.json)\n\n**kernel: of/overlay: only treat a positive changeset id as registered** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 8\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 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 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":23,"depthScoreParts":{"impact":22.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228746,"id":"CVE-2026-98854","ts":1792844946917,"field":"cvss","old":null,"new":"4.1"},{"seq":228745,"id":"CVE-2026-98854","ts":1792844946917,"field":"severity","old":"none","new":"medium"}]}