{"id":"CVE-2026-90383","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: sgi-gru: remove interrupt-context page-table walks\n\nThe GRU TLB miss handler walks a process's page tables without holding\npage-table locks or a reference to the …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: sgi-gru: remove interrupt-context page-table walks\n\nThe GRU TLB miss handler walks a process's page tables without holding\npage-table locks or a reference to the …","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 142586409c8be7dc071bb94d7cd2d69ccfd99b6b < 877423f595b60f8fe7c18b64a5d283d9e1732a13","Linux >= 142586409c8be7dc071bb94d7cd2d69ccfd99b6b < 6248eb1833ff0adfdbbadd5f846c2f22e02a01b0","Linux >= 142586409c8be7dc071bb94d7cd2d69ccfd99b6b < ef81e4a1628ecfb9cfc442de10883f383faf17a1","Linux >= 142586409c8be7dc071bb94d7cd2d69ccfd99b6b < 928a8e9f523df845fc496bcb9811013b67aabec5","Linux 2.6.27"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:17:56.450","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90383","references":[{"url":"https://git.kernel.org/stable/c/6248eb1833ff0adfdbbadd5f846c2f22e02a01b0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/877423f595b60f8fe7c18b64a5d283d9e1732a13","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/928a8e9f523df845fc496bcb9811013b67aabec5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ef81e4a1628ecfb9cfc442de10883f383faf17a1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90383.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-90383"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536349"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90383"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90383"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90383.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-90383"},{"url":"https://git.kernel.org/stable/c/5a540ced720b4397306337cab34af1af4b30827c"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00164,"epssPercentile":0.05545,"ingestedAt":"2026-09-17T16:21:47.805Z","cwe":["CWE-266","CWE-416"],"scores":{"nvd":7.8,"vendor":5.5,"cna":7.8},"slug":"CVE-2026-90383","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmisc: sgi-gru: remove interrupt-context page-table walks\n\nThe GRU TLB miss handler walks a process's page tables without holding\npage-table locks or a reference to the mapped page. It also uses a kernel\npage-table accessor on user page tables and supports only PMD-level large\nmappings on x86-64.\n\nRemove the direct walker. Send interrupt faults directly to user polling\nmode so the existing call-OS fallback retries them in process context.\n\nRemove the mmap-lock failure statistic that can no longer be incremented.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\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 7, Red Hat Enterprise Linux 8, 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 7, Red Hat Enterprise Linux 8, … · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90383.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207289,"id":"CVE-2026-90383","ts":1789757340463,"field":"cvss","old":null,"new":"7.8"},{"seq":207288,"id":"CVE-2026-90383","ts":1789757340463,"field":"severity","old":"none","new":"high"}]}