{"id":"CVE-2026-98002","revision":"5a08ddc14a4a4cfbb57d2a878937c545","records":[{"revision":"5a08ddc14a4a4cfbb57d2a878937c545","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98002","aliases":[],"title":"iommu/amd: Fix ineffective error check in nested domain allocation","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.","state":0,"publishedAt":"2026-09-25T10:23:29.929+00:00","modifiedAt":"2026-10-19T09:12:07.97+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/iommu/amd/nested.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"757d2b1fdf5b7d6eead5963a49b5780617987ab8\",\n                            \"lessThan\": \"80c231f5577229d1e90a1e312b3095f9502f8625\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"757d2b1fdf5b7d6eead5963a49b5780617987ab8\",\n                            \"lessThan\": \"fa5c0827f0b7bac6d0a188f10118151769ae68fd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/iommu/amd/nested.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"7.0\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"7.0\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.7\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/80c231f5577229d1e90a1e312b3095f9502f8625","https://git.kernel.org/stable/c/fa5c0827f0b7bac6d0a188f10118151769ae68fd"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98002","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98002","identifiers":["CVE-2026-98002"]},"retained":false,"historicalAffected":[]}],"coverage":[]}