{"id":"CVE-2026-98855","title":"kernel: of/overlay: put property on deadprops only after changeset add succeeds (CVE-2026-98855)","summary":"A flaw was found in the Linux kernel's Device Tree overlay subsystem. When an error occurs while adding a property to a device tree overlay changeset, the allocated property is freed during error cleanup but remains tracked, leading to a s…","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-1341","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":"2026-10-23T15:23:27+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98855.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98855.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98855"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555241"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98855"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98855"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98855.mbox"},{"url":"https://git.kernel.org/stable/c/936f1ffcb87a1c50938a21176a6463af162cf4b5"},{"url":"https://git.kernel.org/stable/c/d5151496a0a2b19c9c0c7b0ebf86b3de55a8fa3a"},{"url":"https://git.kernel.org/stable/c/7dc6a769153c0457077a0da4888a00f61e66de15"},{"url":"https://git.kernel.org/stable/c/5857035a3b53a4e7b5a0d5a740189901ece0b079"},{"url":"https://git.kernel.org/stable/c/814f2da6995772c07a7c9c2cc6028b6e3f3ecc9c"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00157,"epssPercentile":0.04764,"ingestedAt":"2026-10-18T16:47:32.462Z","slug":"CVE-2026-98855","body":"## Overview\n\nA flaw was found in the Linux kernel's Device Tree overlay subsystem. When an error occurs while adding a property to a device tree overlay changeset, the allocated property is freed during error cleanup but remains tracked, leading to a second release (double-free) when the overlay node is torn down. A local user could exploit this vulnerability to trigger memory corruption, potentially leading to a Denial of Service (DoS) or privilege escalation.\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-2026-98855.json)\n\n**kernel: of/overlay: put property on deadprops only after changeset add succeeds** — 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":24,"depthScoreParts":{"impact":24.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228730,"id":"CVE-2026-98855","ts":1792844942028,"field":"cvss","old":null,"new":"4.4"},{"seq":228729,"id":"CVE-2026-98855","ts":1792844942028,"field":"severity","old":"none","new":"medium"}]}