{"id":"CVE-2026-98002","published":"2026-09-25T11:17:28.430","lastModified":"2026-09-25T15:18:03.580","description":"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_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.","cvssScore":7.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/80c231f5577229d1e90a1e312b3095f9502f8625","tags":[]},{"url":"https://git.kernel.org/stable/c/fa5c0827f0b7bac6d0a188f10118151769ae68fd","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}