{"id":"CVE-2026-98565","title":"kernel: net: dsa: mt7530: fix NULL dereference on unbind of MT7531 and MT7621 (CVE-2026-98565)","summary":"A flaw was found in the Linux kernel's MediaTek MT7530 network switch driver. This flaw allows a local user with administrative privileges to cause a Denial of Service (DoS) through a kernel crash. The issue occurs during driver unbinding …","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-476","vendor":"Red Hat","product":"Linux","affected":["Linux >= ddda1ac116c852bb969541ed53cffef7255c4961 < bd172580e624bac00d83abd5c4320d2e14d853bc","Linux >= ddda1ac116c852bb969541ed53cffef7255c4961 < e9a5298532780ecdd05c3220f3e1e3067b3537c3","Linux >= ddda1ac116c852bb969541ed53cffef7255c4961 < 62c0e38b2e5034184d4502ce77bd178b29e59b83","Linux >= ddda1ac116c852bb969541ed53cffef7255c4961 < aae2a1f1e3a0ac5eeb439262a2328a2a392413ac","Linux >= ddda1ac116c852bb969541ed53cffef7255c4961 < c2cdef41e0b4d8ed23a5b41e6ad4e64594e055e4","Linux 5.1"],"published":"2026-10-18","updated":"2026-10-20","sourceUpdated":"2026-10-20T02:41:37+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98565.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98565.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98565"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554969"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98565"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98565"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98565.mbox"},{"url":"https://git.kernel.org/stable/c/bd172580e624bac00d83abd5c4320d2e14d853bc"},{"url":"https://git.kernel.org/stable/c/e9a5298532780ecdd05c3220f3e1e3067b3537c3"},{"url":"https://git.kernel.org/stable/c/62c0e38b2e5034184d4502ce77bd178b29e59b83"},{"url":"https://git.kernel.org/stable/c/aae2a1f1e3a0ac5eeb439262a2328a2a392413ac"},{"url":"https://git.kernel.org/stable/c/c2cdef41e0b4d8ed23a5b41e6ad4e64594e055e4"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.002,"epssPercentile":0.0978,"ingestedAt":"2026-10-18T15:45:12.261Z","slug":"CVE-2026-98565","body":"## Overview\n\nA flaw was found in the Linux kernel's MediaTek MT7530 network switch driver. This flaw allows a local user with administrative privileges to cause a Denial of Service (DoS) through a kernel crash. The issue occurs during driver unbinding or module removal on specific hardware variants, where the kernel attempts to disable uninitialized power regulators, triggering a null pointer dereference.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98565.json)\n\n**kernel: net: dsa: mt7530: fix NULL dereference on unbind of MT7531 and MT7621** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.\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":24,"depthScoreParts":{"impact":24.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225796,"id":"CVE-2026-98565","ts":1792498456636,"field":"cvss","old":null,"new":"4.4"},{"seq":225795,"id":"CVE-2026-98565","ts":1792498456636,"field":"severity","old":"none","new":"medium"}]}