{"id":"CVE-2026-74355","title":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Fix RB-tree corruption in probe error path\n\nThe info->node RB-tree member is zero-initialized via kzalloc","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Fix RB-tree corruption in probe error path\n\nThe info->node RB-tree member is zero-initialized via kzalloc. If\na device does not support ATS, the device_rbtr…","severity":"high","cvss":8.2,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-824"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9"],"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:17:41.260","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74355","references":[{"url":"https://git.kernel.org/stable/c/43bd9e6d5513cb1edbafdeef146a1edc3aaced56","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d16923a45d4d08367650fdc3451c89299ab6ac5a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f5102e0fc3c6dc8685549891a96e4589fdb3e211","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74355.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-74355"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2516855"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74355"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74355"},{"url":"https://lore.kernel.org/linux-cve-announce/2026081500-CVE-2026-74355-99a3@gregkh/T"}],"tags":["nvd","csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00181,"epssPercentile":0.07562,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:54:21.858928Z"},"scores":{"nvd":8.2,"vendor":5.5,"cna":8.2},"ingestedAt":"2026-10-16T19:46:24.375Z","slug":"CVE-2026-74355","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\niommu/vt-d: Fix RB-tree corruption in probe error path\n\nThe info->node RB-tree member is zero-initialized via kzalloc. If\na device does not support ATS, the device_rbtree_insert() call is\nskipped. If a subsequent probe step fails, the error path jumps to\ndevice_rbtree_remove(), which misinterprets the zeroed node as\na tree root and corrupts the device RB-tree.\n\nFix this by explicitly initializing the RB-node as empty using\nRB_CLEAR_NODE() during initialization and guarding the removal with\nRB_EMPTY_NODE().\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 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74355.json)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":45.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":230337,"id":"CVE-2026-74355","ts":1793130918967,"field":"cvss","old":"5.5","new":"8.2"},{"seq":230336,"id":"CVE-2026-74355","ts":1793130918967,"field":"severity","old":"medium","new":"high"},{"seq":223605,"id":"CVE-2026-74355","ts":1792238336032,"field":"cvss","old":"8.2","new":"5.5"},{"seq":223604,"id":"CVE-2026-74355","ts":1792238336032,"field":"severity","old":"high","new":"medium"}]}