{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23424",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:46.015Z",
        "datePublished": "2026-04-03T13:24:32.622Z",
        "dateUpdated": "2026-08-05T12:21:38.064Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:21:38.064Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\naccel/amdxdna: Validate command buffer payload count\n\nThe count field in the command header is used to determine the valid\npayload size. Verify that the valid payload does not exceed the remaining\nbuffer space."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
                        "baseScore": 7.1,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The vulnerable command payload parsing is reached through local DRM accel device ioctls on /dev/accel/accelN, after creating and submitting an AMDXDNA command BO. It is not reachable from network or adjacent protocols.\nAC:L - The attacker controls the command BO header count and size and can trigger the over-read through normal create-hwctx/create-bo/exec-cmd ioctl flow. No race or condition outside attacker control is required.\nPR:L - The relevant amdxdna ioctls are not marked DRM_ROOT_ONLY and do not require CAP_SYS_ADMIN; a local unprivileged user with access to the accel device can reach them. This is basic local user access, not real root.\nUI:N - Exploitation is performed entirely by the attacking process issuing ioctls and submitting crafted command buffers. No victim user action is needed.\nS:U - The impact is within the local kernel/driver security authority on the same host. I found no VM escape, IOMMU bypass, or cross-authority boundary change.\nC:H - The missing count validation permits out-of-bounds reads past the user command BO, with lengths large enough to copy substantial adjacent kernel-mapped memory into firmware/device command buffers. Under the higher-severity rule, this is a high confidentiality impact.\nI:N - The vulnerable count path over-reads the source command BO, while the observed destination copies are separately bounded. I did not find a kernel out-of-bounds write or control-flow modification primitive caused by this specific missing check.\nA:H - The out-of-bounds kernel read can fault/oops when it crosses unmapped vmalloc or invalid mapped memory, and it is repeatable through crafted command submissions. Kernel crash or scheduler/firmware destabilization is high availability impact."
                        }
                    ]
                }
            ],
            "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_ctx.c"
                    ],
                    "versions": [
                        {
                            "version": "aac243092b707bb3018e951d470cc1a9bcbaba6c",
                            "lessThan": "3464e751755172ddbb849c1bd92f5f59e95c59a1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "aac243092b707bb3018e951d470cc1a9bcbaba6c",
                            "lessThan": "3ed2ae6b3fe869f99b75afd02045ba5c0c0773e2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "aac243092b707bb3018e951d470cc1a9bcbaba6c",
                            "lessThan": "901ec3470994006bc8dd02399e16b675566c3416",
                            "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_ctx.c"
                    ],
                    "versions": [
                        {
                            "version": "6.14",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.14",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.17",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.7",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "6.18.17"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.14",
                                    "versionEndExcluding": "6.19.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.14",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/3464e751755172ddbb849c1bd92f5f59e95c59a1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3ed2ae6b3fe869f99b75afd02045ba5c0c0773e2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/901ec3470994006bc8dd02399e16b675566c3416"
                }
            ],
            "title": "accel/amdxdna: Validate command buffer payload count",
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}