{"id":"CVE-2026-98833","title":"kernel: mtd: core: call _get_device() with the master MTD (CVE-2026-98833)","summary":"A flaw was found in the Linux kernel's Memory Technology Device (MTD) subsystem. When accessing certain partitions, the kernel improperly passes a partition device reference instead of the master device structure to the driver callback. A …","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-843","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-23","sourceUpdated":"2026-10-23T21:27:52+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98833.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98833.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98833"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555250"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98833"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98833"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98833.mbox"},{"url":"https://git.kernel.org/stable/c/d94731cafa57e2c986ff391122d1494e5a3f3c3f"},{"url":"https://git.kernel.org/stable/c/95c8f36293c22d450c371167ad4f9a5bbadc7539"},{"url":"https://git.kernel.org/stable/c/f971f1c63cf71579258360a12bd185bc1cd1a043"},{"url":"https://git.kernel.org/stable/c/dc482a281a19a7d7e91ad1b2d551bb301c54d0e6"},{"url":"https://git.kernel.org/stable/c/12b31d1acd20b3185bb5f0748db0cf6874c8e9d1"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00168,"epssPercentile":0.05981,"ingestedAt":"2026-10-18T16:47:32.470Z","slug":"CVE-2026-98833","body":"## Overview\n\nA flaw was found in the Linux kernel's Memory Technology Device (MTD) subsystem. When accessing certain partitions, the kernel improperly passes a partition device reference instead of the master device structure to the driver callback. A local user could exploit this flaw during device access operations to cause invalid memory references, resulting in a system crash and Denial of Service (DoS).\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98833.json)\n\n**kernel: mtd: core: call _get_device() with the master MTD** — 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 6\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nOut of support scope","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228632,"id":"CVE-2026-98833","ts":1792844820355,"field":"cvss","old":null,"new":"5.5"},{"seq":228631,"id":"CVE-2026-98833","ts":1792844820355,"field":"severity","old":"none","new":"medium"}]}