159 lines
8.3 KiB
JSON
159 lines
8.3 KiB
JSON
{
|
|
"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",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
}
|
|
}
|
|
} |