{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-53501", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-01T11:39:39.404Z", "datePublished": "2025-10-01T11:45:52.204Z", "dateUpdated": "2026-05-11T19:46:13.112Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:46:13.112Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/amd/iommu_v2: Fix pasid_state refcount dec hit 0 warning on pasid unbind\n\nWhen unbinding pasid - a race condition exists vs outstanding page faults.\n\nTo prevent this, the pasid_state object contains a refcount.\n * set to 1 on pasid bind\n * incremented on each ppr notification start\n * decremented on each ppr notification done\n * decremented on pasid unbind\n\nSince refcount_dec assumes that refcount will never reach 0:\n the current implementation causes the following to be invoked on\n pasid unbind:\n REFCOUNT_WARN(\"decrement hit 0; leaking memory\")\n\nFix this issue by changing refcount_dec to refcount_dec_and_test\nto explicitly handle refcount=1."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iommu/amd/iommu_v2.c"], "versions": [{"version": "8bc54824da4e8fcf0ed679cf09ac32f23d83254a", "lessThan": "a50d60b8f2aff46dd7c7edb4a5835cdc4d432c22", "status": "affected", "versionType": "git"}, {"version": "8bc54824da4e8fcf0ed679cf09ac32f23d83254a", "lessThan": "13ed255248dfbbb7f23f9170c7a537fb9ca22c73", "status": "affected", "versionType": "git"}, {"version": "8bc54824da4e8fcf0ed679cf09ac32f23d83254a", "lessThan": "9ccc51be3126b25cfe9351dbffde946c925cc28a", "status": "affected", "versionType": "git"}, {"version": "8bc54824da4e8fcf0ed679cf09ac32f23d83254a", "lessThan": "98d86bf32187db27946ca817c2467a5f2f7aa02f", "status": "affected", "versionType": "git"}, {"version": "8bc54824da4e8fcf0ed679cf09ac32f23d83254a", "lessThan": "534103bcd52ca9c1fecbc70e717b4a538dc4ded8", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iommu/amd/iommu_v2.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.132", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.53", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.4.16", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.5.3", "lessThanOrEqual": "6.5.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "5.15.132"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.4.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.5.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a50d60b8f2aff46dd7c7edb4a5835cdc4d432c22"}, {"url": "https://git.kernel.org/stable/c/13ed255248dfbbb7f23f9170c7a537fb9ca22c73"}, {"url": "https://git.kernel.org/stable/c/9ccc51be3126b25cfe9351dbffde946c925cc28a"}, {"url": "https://git.kernel.org/stable/c/98d86bf32187db27946ca817c2467a5f2f7aa02f"}, {"url": "https://git.kernel.org/stable/c/534103bcd52ca9c1fecbc70e717b4a538dc4ded8"}], "title": "iommu/amd/iommu_v2: Fix pasid_state refcount dec hit 0 warning on pasid unbind", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"created": "2025-10-02T08:38:25.726463+00:00", "updated": "2025-10-02T08:38:25.726519+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}