{"api_version":"1","generated_at":"2026-10-26T08:56:28+00:00","cve":"CVE-2026-98436","urls":{"html":"https://cve.report/CVE-2026-98436","api":"https://cve.report/api/cve/CVE-2026-98436.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98436","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98436"},"summary":{"title":"accel/amdxdna: Disable device buffer exporting","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-18 15:16:53","updated_at":"2026-10-26 07:17:10"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/9480dd7ec3fcadd4217503e4bb32c16e19e4b21f","name":"https://git.kernel.org/stable/c/9480dd7ec3fcadd4217503e4bb32c16e19e4b21f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/33b00fa8023e8ade3409aa9c833b8ce65b8c29eb","name":"https://git.kernel.org/stable/c/33b00fa8023e8ade3409aa9c833b8ce65b8c29eb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98436","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98436","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ac49797c1815d4f8f04b7053b2998c546283c89e 33b00fa8023e8ade3409aa9c833b8ce65b8c29eb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ac49797c1815d4f8f04b7053b2998c546283c89e 9480dd7ec3fcadd4217503e4bb32c16e19e4b21f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.14","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.7 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"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"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.7","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"6.14","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - A local DRM_IOCTL_AMDXDNA_CREATE_BO reaches amdxdna_drm_create_bo_ioctl()→amdxdna_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()→amdxdna_gem_dev_obj_free() and operates on the destroyed mutex and freed drm_mm state, which can immediately oops or panic the kernel."}]}],"providerMetadata":{"dateUpdated":"2026-10-26T06:55:45.188Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98436","datePublished":"2026-10-18T14:45:25.364Z","dateReserved":"2026-09-25T10:25:14.349Z","dateUpdated":"2026-10-26T06:55:45.188Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-18 15:16:53","lastModifiedDate":"2026-10-26 07:17:10","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"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","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98436","Ordinal":"1","Title":"accel/amdxdna: Disable device buffer exporting","CVE":"CVE-2026-98436","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98436","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"accel/amdxdna: Disable device buffer exporting"}]}}}