{"id":"CVE-2026-98002","title":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/amd: Fix ineffective error check in nested domain allocation\n\namd_iommu_pdom_id_alloc() returns an int: a domain ID on success, or the\nnegative errno from ida_all…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\niommu/amd: Fix ineffective error check in nested domain allocation\n\namd_iommu_pdom_id_alloc() returns an int: a domain ID on success, or the\nnegative errno from ida_all…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 757d2b1fdf5b7d6eead5963a49b5780617987ab8 < 80c231f5577229d1e90a1e312b3095f9502f8625","Linux >= 757d2b1fdf5b7d6eead5963a49b5780617987ab8 < fa5c0827f0b7bac6d0a188f10118151769ae68fd","Linux 7.0"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T15:18:03.580","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98002","references":[{"url":"https://git.kernel.org/stable/c/80c231f5577229d1e90a1e312b3095f9502f8625","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fa5c0827f0b7bac6d0a188f10118151769ae68fd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-25T11:06:38.862Z","slug":"CVE-2026-98002","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\niommu/amd: Fix ineffective error check in nested domain allocation\n\namd_iommu_pdom_id_alloc() returns an int: a domain ID on success, or the\nnegative errno from ida_alloc_range() when the ID space is exhausted or\nmemory is short.  amd_iommu_alloc_domain_nested() stores that return value\nin gdom_info->hdom_id, which is a u32, and only then tests it:\n\n\tgdom_info->hdom_id = amd_iommu_pdom_id_alloc();\n\tif (gdom_info->hdom_id <= 0) {\n\nThe assignment discards the sign, so -ENOSPC becomes 0xffffffe4 and the\ntest never fires.  The nested domain is then set up with a host domain ID\nthat was never allocated, instead of the allocation failing with -ENOSPC.\n\nKeep the value in an int, test it there, and store it only once it is\nknown to be valid, which is what the other amd_iommu_pdom_id_alloc()\ncallers already do.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":210934,"id":"CVE-2026-98002","ts":1790349116931,"field":"cvss","old":null,"new":"7.8"},{"seq":210933,"id":"CVE-2026-98002","ts":1790349116931,"field":"severity","old":"none","new":"high"}]}