CVE-2026-89451

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89451", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.706Z", "datePublished": "2026-09-11T19:43:16.730Z", "dateUpdated": "2026-10-21T12:47:29.668Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:47:29.668Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/sva: Set handle->dev before the SVA handle is visible\n\niommu_attach_device_pasid() installs the new SVA attach handle in the\ngroup PASID lookup before iommu_sva_bind_device() returns. A concurrent\nbind can therefore find and reuse the same handle after iommu_sva_lock is\ndropped.\n\nhandle->dev was initialized after dropping iommu_sva_lock. This leaves a\nwindow where a racing bind can return a handle whose dev pointer is still\nNULL. A subsequent iommu_sva_unbind_device() can then dereference it via\nhandle->dev->iommu_group.\n\nInitialize handle->dev before releasing iommu_sva_lock so any visible SVA\nhandle is fully initialized."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/iommu/iommu-sva.c"], "versions": [{"version": "be51b1d6bbff48c7d1943a8ff1e5a55777807f6e", "lessThan": "c4c71368bc5c5b3840590d39b4cfa12d733cadf4", "status": "affected", "versionType": "git"}, {"version": "be51b1d6bbff48c7d1943a8ff1e5a55777807f6e", "lessThan": "bcffb1c75da8fc9d51168ff9f09d471c26507912", "status": "affected", "versionType": "git"}, {"version": "be51b1d6bbff48c7d1943a8ff1e5a55777807f6e", "lessThan": "968e9a1f71140c86dc4092f6b361e997923f3813", "status": "affected", "versionType": "git"}, {"version": "be51b1d6bbff48c7d1943a8ff1e5a55777807f6e", "lessThan": "37a96a30617a4c96f048a5874c00509bc4fe4d85", "status": "affected", "versionType": "git"}, {"version": "be51b1d6bbff48c7d1943a8ff1e5a55777807f6e", "lessThan": "530f8f9c3546cb3ebee1b135375aaee08a073ebb", "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/iommu-sva.c"], "versions": [{"version": "6.2", "status": "affected"}, {"version": "0", "lessThan": "6.2", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.2", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c4c71368bc5c5b3840590d39b4cfa12d733cadf4"}, {"url": "https://git.kernel.org/stable/c/bcffb1c75da8fc9d51168ff9f09d471c26507912"}, {"url": "https://git.kernel.org/stable/c/968e9a1f71140c86dc4092f6b361e997923f3813"}, {"url": "https://git.kernel.org/stable/c/37a96a30617a4c96f048a5874c00509bc4fe4d85"}, {"url": "https://git.kernel.org/stable/c/530f8f9c3546cb3ebee1b135375aaee08a073ebb"}], "title": "iommu/sva: Set handle->dev before the SVA handle is visible", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/iommu/iommu-sva.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c4c71368bc5c5b3840590d39b4cfa12d733cadf4", "status": "affected", "version": "be51b1d6bbff48c7d1943a8ff1e5a55777807f6e", "versionType": "git"}, {"lessThan": "bcffb1c75da8fc9d51168ff9f09d471c26507912", "status": "affected", "version": "be51b1d6bbff48c7d1943a8ff1e5a55777807f6e", "versionType": "git"}, {"lessThan": "968e9a1f71140c86dc4092f6b361e997923f3813", "status": "affected", "version": "be51b1d6bbff48c7d1943a8ff1e5a55777807f6e", "versionType": "git"}, {"lessThan": "37a96a30617a4c96f048a5874c00509bc4fe4d85", "status": "affected", "version": "be51b1d6bbff48c7d1943a8ff1e5a55777807f6e", "versionType": "git"}, {"lessThan": "530f8f9c3546cb3ebee1b135375aaee08a073ebb", "status": "affected", "version": "be51b1d6bbff48c7d1943a8ff1e5a55777807f6e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/iommu/iommu-sva.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.2"}, {"lessThan": "6.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/sva: Set handle->dev before the SVA handle is visible\n\niommu_attach_device_pasid() installs the new SVA attach handle in the\ngroup PASID lookup before iommu_sva_bind_device() returns. A concurrent\nbind can therefore find and reuse the same handle after iommu_sva_lock is\ndropped.\n\nhandle->dev was initialized after dropping iommu_sva_lock. This leaves a\nwindow where a racing bind can return a handle whose dev pointer is still\nNULL. A subsequent iommu_sva_unbind_device() can then dereference it via\nhandle->dev->iommu_group.\n\nInitialize handle->dev before releasing iommu_sva_lock so any visible SVA\nhandle is fully initialized."}], "id": "CVE-2026-89451", "lastModified": "2026-10-21T13:20:05.157", "metrics": {}, "published": "2026-09-11T20:19:25.727", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/37a96a30617a4c96f048a5874c00509bc4fe4d85"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/530f8f9c3546cb3ebee1b135375aaee08a073ebb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/968e9a1f71140c86dc4092f6b361e997923f3813"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bcffb1c75da8fc9d51168ff9f09d471c26507912"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c4c71368bc5c5b3840590d39b4cfa12d733cadf4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: iommu/sva null pointer dereference via race condition", "id": "2532460", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532460"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel's IOMMU (Input/Output Memory Management Unit) SVA (Shared Virtual Addressing) component. A race condition during the attachment of an SVA handle can lead to a situation where a device pointer is not properly initialized. A local attacker could exploit this flaw by triggering concurrent bind operations, potentially causing a null pointer dereference and a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-89451", "public_date": "2026-09-11T19:43:16Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89451\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89451\nhttps://git.kernel.org/stable/c/37a96a30617a4c96f048a5874c00509bc4fe4d85\nhttps://git.kernel.org/stable/c/530f8f9c3546cb3ebee1b135375aaee08a073ebb\nhttps://git.kernel.org/stable/c/968e9a1f71140c86dc4092f6b361e997923f3813\nhttps://git.kernel.org/stable/c/bcffb1c75da8fc9d51168ff9f09d471c26507912"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[be51b1d6bbff48c7d1943a8ff1e5a55777807f6e,bcffb1c75da8fc9d51168ff9f09d471c26507912)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[be51b1d6bbff48c7d1943a8ff1e5a55777807f6e,968e9a1f71140c86dc4092f6b361e997923f3813)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[be51b1d6bbff48c7d1943a8ff1e5a55777807f6e,37a96a30617a4c96f048a5874c00509bc4fe4d85)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[be51b1d6bbff48c7d1943a8ff1e5a55777807f6e,530f8f9c3546cb3ebee1b135375aaee08a073ebb)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-13T04:00:08.877678+00:00", "updated": "2026-09-21T01:30:08.759626+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}