{"id":"CVE-2026-89504","title":"kernel: regulator: as3722_get_regulator_dt_data: fix premature of_node_put leaving dangling of_node pointer (CVE-2026-89504)","summary":"A flaw was found in the Linux kernel's regulator subsystem. This vulnerability arises from a programming error where a device tree node pointer is released too early, creating a \"dangling pointer\"—a reference to memory that is no longer va…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-825","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":"2026-09-18","sourceUpdated":"2026-09-18T21:28:51+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89504.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89504.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89504"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532102"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89504"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89504"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89504.mbox"},{"url":"https://git.kernel.org/stable/c/d9b1407477fb736978b04108073180ca84958936"},{"url":"https://git.kernel.org/stable/c/bd5606e9da1a01a61c7d2f5df36243414a0142be"},{"url":"https://git.kernel.org/stable/c/0bde4f140e90f87ebd49cd9c884c4bb3f19fe931"},{"url":"https://git.kernel.org/stable/c/eda08b6bd64f01ca9defbfcc9e0c3e30f46cfc02"},{"url":"https://git.kernel.org/stable/c/d3c1316d84e0a036890b00ae6e4c0b0b80f70c25"},{"url":"https://git.kernel.org/stable/c/95342d26f9c6b68a46ab57fa48428a3c4a423dd7"},{"url":"https://git.kernel.org/stable/c/8648e29e5c01b6b677c704049189287e27255ccb"},{"url":"https://git.kernel.org/stable/c/f9324d670ae0b88cbfb0aa48fcaefa5baeb8da4c"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00144,"epssPercentile":0.04025,"scores":{"vendor":5.5,"cna":8.4},"ingestedAt":"2026-09-14T15:23:07.452Z","slug":"CVE-2026-89504","body":"## Overview\n\nA flaw was found in the Linux kernel's regulator subsystem. This vulnerability arises from a programming error where a device tree node pointer is released too early, creating a \"dangling pointer\"—a reference to memory that is no longer valid. This can lead to system instability, potentially causing the system to crash, resulting in a Denial of Service (DoS). In some scenarios, this type of memory corruption could also be exploited by a local attacker to achieve arbitrary code execution.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89504.json)\n\n**kernel: regulator: as3722_get_regulator_dt_data: fix premature of_node_put leaving dangling of_node pointer** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.\n\nNot affected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":206944,"id":"CVE-2026-89504","ts":1789749711107,"field":"cvss","old":"8.4","new":"5.5"},{"seq":206943,"id":"CVE-2026-89504","ts":1789749711107,"field":"severity","old":"high","new":"medium"},{"seq":197996,"id":"CVE-2026-89504","ts":1789384321303,"field":"cvss","old":"4.1","new":"8.4"},{"seq":197995,"id":"CVE-2026-89504","ts":1789384321303,"field":"severity","old":"medium","new":"high"},{"seq":183506,"id":"CVE-2026-89504","ts":1789356675648,"field":"cvss","old":"8.4","new":"4.1"},{"seq":183505,"id":"CVE-2026-89504","ts":1789356675648,"field":"severity","old":"high","new":"medium"},{"seq":153296,"id":"CVE-2026-89504","ts":1789285349929,"field":"cvss","old":null,"new":"8.4"},{"seq":153295,"id":"CVE-2026-89504","ts":1789285349929,"field":"severity","old":"none","new":"high"},{"seq":147724,"id":"CVE-2026-89504","ts":1789270212045,"field":"cvss","old":null,"new":"4.1"},{"seq":147723,"id":"CVE-2026-89504","ts":1789270212045,"field":"severity","old":"none","new":"medium"},{"seq":109476,"id":"CVE-2026-89504","ts":1789183732062,"field":"cvss","old":null,"new":"4.1"},{"seq":109475,"id":"CVE-2026-89504","ts":1789183732062,"field":"severity","old":"none","new":"medium"}]}