{
    "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": "2026-10-24T14:08:47.473Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-24T14:08:47.473Z"
            },
            "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()→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."
                        }
                    ]
                }
            ],
            "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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                            "lessThan": "33b00fa8023e8ade3409aa9c833b8ce65b8c29eb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                            "lessThan": "9480dd7ec3fcadd4217503e4bb32c16e19e4b21f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0",
                            "lessThan": "7.2.7",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "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": "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:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "7.2.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "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"
            }
        }
    }
}