264 lines
14 KiB
JSON
264 lines
14 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-23227",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-01-13T15:37:45.987Z",
|
|
"datePublished": "2026-02-18T14:53:30.784Z",
|
|
"dateUpdated": "2026-08-05T12:20:45.582Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-05T12:20:45.582Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to memory alloc/free\n\nExynos Virtual Display driver performs memory alloc/free operations\nwithout lock protection, which easily causes concurrency problem.\n\nFor example, use-after-free can occur in race scenario like this:\n```\n\tCPU0\t\t\t\tCPU1\t\t\t\tCPU2\n\t----\t\t\t\t----\t\t\t\t----\n vidi_connection_ioctl()\n if (vidi->connection) // true\n drm_edid = drm_edid_alloc(); // alloc drm_edid\n ...\n ctx->raw_edid = drm_edid;\n ...\n\t\t\t\t\t\t\t\tdrm_mode_getconnector()\n\t\t\t\t\t\t\t\t drm_helper_probe_single_connector_modes()\n\t\t\t\t\t\t\t\t vidi_get_modes()\n\t\t\t\t\t\t\t\t if (ctx->raw_edid) // true\n\t\t\t\t\t\t\t\t drm_edid_dup(ctx->raw_edid);\n\t\t\t\t\t\t\t\t if (!drm_edid) // false\n\t\t\t\t\t\t\t\t ...\n\t\t\t\tvidi_connection_ioctl()\n\t\t\t\t if (vidi->connection) // false\n\t\t\t\t drm_edid_free(ctx->raw_edid); // free drm_edid\n\t\t\t\t ...\n\t\t\t\t\t\t\t\t drm_edid_alloc(drm_edid->edid)\n\t\t\t\t\t\t\t\t kmemdup(edid); // UAF!!\n\t\t\t\t\t\t\t\t ...\n```\n\nTo prevent these vulns, at least in vidi_context, member variables related\nto memory alloc/free should be protected with ctx->lock."
|
|
}
|
|
],
|
|
"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 - Requires local access to the DRM device node (/dev/dri/cardN) to issue the vidi_connection_ioctl and drm_mode_getconnector ioctls. Not reachable over network.\nAC:L - The attacker controls both sides of the race by issuing concurrent ioctls from multiple threads — one calling vidi_connection_ioctl to free raw_edid and another calling drm_mode_getconnector to read it.\nPR:L - The ioctl requires DRM_AUTH, which is granted to any process authenticated by the DRM master (display server). Any local user in a graphical session on an Exynos device has this access.\nUI:N - No victim action required; the attacker triggers the race entirely through their own concurrent ioctl calls.\nS:U - The vulnerability is in the kernel and impacts kernel memory; there is no crossing of a security boundary like VM escape or sandbox escape.\nC:H - The use-after-free allows reading freed memory via kmemdup on the reclaimed object, providing arbitrary memory read primitives when combined with heap spraying.\nI:H - The UAF enables heap spraying to reclaim the freed slot with attacker-controlled data, giving arbitrary write primitives and potential control flow hijacking for code execution.\nA:H - The use-after-free reliably causes kernel crashes (oops/panic) when the freed memory is accessed, providing a denial of service."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"drivers/gpu/drm/exynos/exynos_drm_vidi.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f",
|
|
"lessThan": "56966a4cfa925ec24edb68ab652a740a7abe2c4d",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f",
|
|
"lessThan": "9e1ef9396a1899925911b1729cb65665420268df",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f",
|
|
"lessThan": "92dd1f38d7db75374dcdaf54f1d79d67bffd54e5",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f",
|
|
"lessThan": "1b24d3e8792bcc050c70e8e0dea6b49c4fc63b13",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f",
|
|
"lessThan": "abfdf449fb3d7b42e85a1ad1c8694b768b1582f4",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f",
|
|
"lessThan": "60b75407c172e1f341a8a5097c5cbc97dbbdd893",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f",
|
|
"lessThan": "0cd2c155740dbd00868ac5a8ae5d14cd6b9ed385",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "d3b62dbfc7b9bb013926f56db79b60f6c18c392f",
|
|
"lessThan": "52b330799e2d6f825ae2bb74662ec1b10eb954bb",
|
|
"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/gpu/drm/exynos/exynos_drm_vidi.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "3.6",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "3.6",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.10.253",
|
|
"lessThanOrEqual": "5.10.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "5.15.203",
|
|
"lessThanOrEqual": "5.15.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.1.167",
|
|
"lessThanOrEqual": "6.1.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.6.130",
|
|
"lessThanOrEqual": "6.6.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.12.77",
|
|
"lessThanOrEqual": "6.12.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.18.11",
|
|
"lessThanOrEqual": "6.18.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.19.1",
|
|
"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": "3.6",
|
|
"versionEndExcluding": "5.10.253"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.6",
|
|
"versionEndExcluding": "5.15.203"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.6",
|
|
"versionEndExcluding": "6.1.167"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.6",
|
|
"versionEndExcluding": "6.6.130"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.6",
|
|
"versionEndExcluding": "6.12.77"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.6",
|
|
"versionEndExcluding": "6.18.11"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.6",
|
|
"versionEndExcluding": "6.19.1"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "3.6",
|
|
"versionEndExcluding": "7.0"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/56966a4cfa925ec24edb68ab652a740a7abe2c4d"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/9e1ef9396a1899925911b1729cb65665420268df"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/92dd1f38d7db75374dcdaf54f1d79d67bffd54e5"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/1b24d3e8792bcc050c70e8e0dea6b49c4fc63b13"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/abfdf449fb3d7b42e85a1ad1c8694b768b1582f4"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/60b75407c172e1f341a8a5097c5cbc97dbbdd893"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/0cd2c155740dbd00868ac5a8ae5d14cd6b9ed385"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/52b330799e2d6f825ae2bb74662ec1b10eb954bb"
|
|
}
|
|
],
|
|
"title": "drm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to memory alloc/free",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
}
|
|
}
|
|
} |