{"id":"CVE-2026-89811","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Add TLB flush after MES queue eviction/suspension\n\nMES (Micro Engine Scheduler) does not perform heavy-weight TLB\ninvalidation after unmapping queues, unlik…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Add TLB flush after MES queue eviction/suspension\n\nMES (Micro Engine Scheduler) does not perform heavy-weight TLB\ninvalidation after unmapping queues, unlik…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e230c546ed93741833ab5babb0b202f9c2052b45","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 6aae545c87087e4dc96e205452243813bfa73ba2","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 94e25cb6ab7f4f025bcdcd8ea79fda30f12843a4","Linux < 6.18.51","Linux < 7.2.5","Linux (all versions)"],"published":"2026-09-16","updated":"2026-09-17","sourceUpdated":"2026-09-17T10:17:04.273","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89811","references":[{"url":"https://git.kernel.org/stable/c/6aae545c87087e4dc96e205452243813bfa73ba2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/94e25cb6ab7f4f025bcdcd8ea79fda30f12843a4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e230c546ed93741833ab5babb0b202f9c2052b45","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89811.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89811"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2535309"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89811"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89811"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89811.mbox"},{"url":"https://access.redhat.com/errata/RHSA-2026:81552"},{"url":"https://access.redhat.com/errata/RHSA-2026:82806"},{"url":"https://git.kernel.org/stable/c/5bbd7f283312d0209a0fedcc9d2d33b5afa5a7b1"},{"url":"https://git.kernel.org/stable/c/bbf5ad5268f36d7ebb7e99ae78fc73cffe98d372"},{"url":"https://access.redhat.com/errata/RHSA-2026:88477"},{"url":"https://access.redhat.com/errata/RHSA-2026:82807"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-16T10:53:54.005Z","epss":0.00174,"epssPercentile":0.06849,"patched":["enterprise_linux_appstream_v_9","enterprise_linux_baseos_v_9","enterprise_linux_codeready_linux_builder_v_9","enterprise_linux_nfv_v_8","enterprise_linux_real_time_for_nfv_v_9","enterprise_linux_rt_v_8","enterprise_linux_real_time_v_9"],"cwe":["CWE-825"],"scores":{"nvd":8.8,"vendor":7,"cna":8.8},"slug":"CVE-2026-89811","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Add TLB flush after MES queue eviction/suspension\n\nMES (Micro Engine Scheduler) does not perform heavy-weight TLB\ninvalidation after unmapping queues, unlike HWS which does this\nautomatically. This causes a race condition where in-flight DMA\ndescriptors can access memory that has been unmapped, leading to page\nfaults and GPU queue hangs during SVM page migration.\n\nThe issue manifests as KFDSVMRangeTest.MultiThreadMigrationTest\nfailures on gfx1151 (Strix Point) with XNACK mode 1 enabled - the GPU\ncompute queue hangs with packets submitted but never consumed.\n\nAdd kfd_flush_tlb() calls after MES queue removal in two locations:\n- evict_process_queues_cpsch(): after all queues removed during eviction\n- suspend_queues(): after debug/criu queue suspension (with mem_fence barrier)\n\nThis ensures all in-flight memory accesses from unmapped queues are\nflushed before memory is freed or migrated.\n\n(cherry picked from commit f5c4f88e0f9c45a8fb9dfac0c1df726c95e41b77)\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:81552** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9), Red Hat Enterprise Linux Real Time (v. 9) · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:81552)\n- **RHSA-2026:82806** · Red Hat · fixed in: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8) · released 2026-10-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:82806)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4, Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 7, 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-2026-89811.json)\n- **RHSA-2026:88477** · Red Hat · fixed in: 10Base-SMTV, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Hidden (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10), … · released 2026-10-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:88477)\n- **RHSA-2026:82807** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8) · released 2026-10-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:82807)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205237,"id":"CVE-2026-89811","ts":1789570705873,"field":"cvss","old":null,"new":"8.8"},{"seq":205236,"id":"CVE-2026-89811","ts":1789570705873,"field":"severity","old":"none","new":"high"}]}