CVE-2026-98436

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98436", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.349Z", "datePublished": "2026-10-18T14:45:25.364Z", "dateUpdated": "2026-10-26T06:55:45.188Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-26T06:55:45.188Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Disable device buffer exporting\n\nDevice buffers are never intended to be exported. Disable exporting\nsupport explicitly."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - A local DRM_IOCTL_AMDXDNA_CREATE_BO reaches amdxdna_drm_create_bo_ioctl()\u2192amdxdna_drm_create_dev_bo(). PRIME_HANDLE_TO_FD then reaches the site fixed by amdxdna_gem_dev_obj_export(); without that callback, drm_gem_prime_handle_to_dmabuf() exports the object, with no remote input.\nAC:L - The attacker maps a DEV_HEAP, creates and exports an AMDXDNA_BO_DEV, closes the accel fd to free its amdxdna_client, then closes the retained dma-buf fd. This deterministic sequence requires no race or condition outside the attacker's control.\nPR:L - AMDXDNA_CREATE_BO is registered with flags 0, while PRIME_HANDLE_TO_FD has DRM_RENDER_ALLOW but no DRM_ROOT_ONLY or DRM_AUTH; drm_ioctl_permit() imposes no capability check. Only ordinary access to /dev/accel/accelN is required.\nUI:N - The attacker personally creates, maps, exports, and closes the buffer descriptors; no victim must open a file, mount media, or perform another action.\nS:U - The dangling amdxdna_client and its dev_heap_mm are kernel-owned objects corrupted within the host kernel's security authority; this path does not itself escape a VM or bypass an IOMMU boundary.\nC:H - After amdxdna_client_cleanup() frees abo->client, amdxdna_gem_heap_free() follows that stale pointer into dev_heap_mm and dev_heap_xa. Reclaiming the freed client allocation permits attacker-influenced pointer reads and the arbitrary-disclosure potential of a kernel UAF.\nI:H - amdxdna_gem_heap_free() locks the freed client->mm_lock and drm_mm_remove_node() performs tree/list updates through the freed dev_heap_mm. Heap grooming can control reclaimed pointer state, turning these writes into memory corruption and potential control-flow hijacking.\nA:H - Closing the retained dma-buf invokes drm_gem_dmabuf_release()\u2192amdxdna_gem_dev_obj_free() and operates on the destroyed mutex and freed drm_mm state, which can immediately oops or panic the kernel."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/accel/amdxdna/amdxdna_gem.c"], "versions": [{"version": "ac49797c1815d4f8f04b7053b2998c546283c89e", "lessThan": "33b00fa8023e8ade3409aa9c833b8ce65b8c29eb", "status": "affected", "versionType": "git"}, {"version": "ac49797c1815d4f8f04b7053b2998c546283c89e", "lessThan": "9480dd7ec3fcadd4217503e4bb32c16e19e4b21f", "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/accel/amdxdna/amdxdna_gem.c"], "versions": [{"version": "6.14", "status": "affected"}, {"version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "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": "6.14", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/33b00fa8023e8ade3409aa9c833b8ce65b8c29eb"}, {"url": "https://git.kernel.org/stable/c/9480dd7ec3fcadd4217503e4bb32c16e19e4b21f"}], "title": "accel/amdxdna: Disable device buffer exporting", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/accel/amdxdna/amdxdna_gem.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "33b00fa8023e8ade3409aa9c833b8ce65b8c29eb", "status": "affected", "version": "ac49797c1815d4f8f04b7053b2998c546283c89e", "versionType": "git"}, {"lessThan": "9480dd7ec3fcadd4217503e4bb32c16e19e4b21f", "status": "affected", "version": "ac49797c1815d4f8f04b7053b2998c546283c89e", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/accel/amdxdna/amdxdna_gem.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.14"}, {"lessThan": "6.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.7", "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\naccel/amdxdna: Disable device buffer exporting\n\nDevice buffers are never intended to be exported. Disable exporting\nsupport explicitly."}], "id": "CVE-2026-98436", "lastModified": "2026-10-26T07:17:10.860", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-10-18T15:16:53.397", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/33b00fa8023e8ade3409aa9c833b8ce65b8c29eb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9480dd7ec3fcadd4217503e4bb32c16e19e4b21f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,33b00fa8023e8ade3409aa9c833b8ce65b8c29eb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,9480dd7ec3fcadd4217503e4bb32c16e19e4b21f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,7.2.7)"}}], "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": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.7,7.3.0)"}}, {"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": "2026-10-18T16:30:13.921183+00:00", "updated": "2026-10-24T18:00:16.793787+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-284", "CWE-200"]}