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vuln-cve/data/2026/74xxx/CVE-2026-74450.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-74450",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-08-15T05:44:03.899Z",
"datePublished": "2026-08-15T12:26:55.127Z",
"dateUpdated": "2026-10-16T19:05:46.575Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-23T12:47:19.009Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/pm: fix pptable use-after-free\n\namdgpu_dpm_get_pp_table() returns a pointer to a driver-owned power table\nafter dropping adev->pm.mutex. The sysfs path then copies from that pointer.\nA concurrent pp_table write can replace and free the allocation during the\ncopy, causing a use-after-free.\n\nChange the DPM interface to copy into caller-provided storage while the mutex\nis held. Keep the size-only query for attribute discovery without exposing\nthe driver-owned pointer.\n\n(cherry picked from commit f6eed7acfd30099ef7baeb6ba45bb59daad80631)"
}
],
"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 - Reached only via local sysfs read/write on /sys/class/drm/cardN/device/pp_table (amdgpu_get_pp_table/amdgpu_set_pp_table); no network, adjacent, or physical-access path exists into amdgpu_dpm_get_pp_table().\nAC:L - A single attacker can drive both sides of the race with concurrent pp_table read and write threads; the write path holds pm.mutex during smu_reset/smu_sys_set_pp_table() while the read copies up to PAGE_SIZE-1 bytes from a pointer obtained after mutex drop.\nPR:L - Triggering the concurrent write/free requires sysfs write access to pp_table; the kernel CNA's CVE-2025-21780 scored the same attribute PR:L because gaming/handheld udev rules commonly group-write pp_* nodes and the commit describes a concurrent pp_table write.\nUI:N - Exploitation is performed by the attacker's own concurrent sysfs read/write loops; no action by another user or victim is required.\nS:U - The use-after-free corrupts kernel heap memory during a sysfs memcpy in amdgpu_pm.c; impact stays within the kernel security authority with no VM, IOMMU, or sandbox boundary crossed.\nC:H - Use-after-free on a kmalloc'd pp table during memcpy can return freed/reallocated kernel heap contents up to PAGE_SIZE-1 bytes to userspace and enables arbitrary kernel memory reads via heap grooming.\nI:H - Concurrent pp_table writes control kmalloc size/contents while reads dereference the freed pptable, classic UAF heap corruption that can be weaponized for arbitrary kernel writes and privilege escalation.\nA:H - Reading freed pptable memory during memcpy causes kernel oops/panic and smu_reset() during the concurrent write can wedge discrete AMD GPUs; UAF reliably threatens system/GPU availability."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/gpu/drm/amd/pm/amdgpu_dpm.c",
"drivers/gpu/drm/amd/pm/amdgpu_pm.c",
"drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h"
],
"versions": [
{
"version": "1684d3ba488529266ce6f97b88076bd185f4790e",
"lessThan": "3fbb3ac75000e3187f500a91a4099b24206866a1",
"status": "affected",
"versionType": "git"
},
{
"version": "1684d3ba488529266ce6f97b88076bd185f4790e",
"lessThan": "9efc767335234cf7a892e46d45cd453b711421e7",
"status": "affected",
"versionType": "git"
},
{
"version": "1684d3ba488529266ce6f97b88076bd185f4790e",
"lessThan": "81b5af1fb0f14cace6c3b3130a05e5602a597820",
"status": "affected",
"versionType": "git"
},
{
"version": "1684d3ba488529266ce6f97b88076bd185f4790e",
"lessThan": "8c685df5c3b261c42505110965b42f9a754eb9b7",
"status": "affected",
"versionType": "git"
},
{
"version": "1684d3ba488529266ce6f97b88076bd185f4790e",
"lessThan": "b628f2c6feb3a115ea72d3120a2bd94afc5163df",
"status": "affected",
"versionType": "git"
},
{
"version": "1684d3ba488529266ce6f97b88076bd185f4790e",
"lessThan": "bb493058c35c8676e48269ab6732688ea733d23c",
"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/amd/pm/amdgpu_dpm.c",
"drivers/gpu/drm/amd/pm/amdgpu_pm.c",
"drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h"
],
"versions": [
{
"version": "4.9",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.9",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.184",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.153",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.105",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.46",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.1.8",
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.2",
"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": "4.9",
"versionEndExcluding": "6.1.184"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.9",
"versionEndExcluding": "6.6.153"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.9",
"versionEndExcluding": "6.12.105"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.9",
"versionEndExcluding": "6.18.46"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.9",
"versionEndExcluding": "7.1.8"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.9",
"versionEndExcluding": "7.2"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/3fbb3ac75000e3187f500a91a4099b24206866a1"
},
{
"url": "https://git.kernel.org/stable/c/9efc767335234cf7a892e46d45cd453b711421e7"
},
{
"url": "https://git.kernel.org/stable/c/81b5af1fb0f14cace6c3b3130a05e5602a597820"
},
{
"url": "https://git.kernel.org/stable/c/8c685df5c3b261c42505110965b42f9a754eb9b7"
},
{
"url": "https://git.kernel.org/stable/c/b628f2c6feb3a115ea72d3120a2bd94afc5163df"
},
{
"url": "https://git.kernel.org/stable/c/bb493058c35c8676e48269ab6732688ea733d23c"
}
],
"title": "drm/amd/pm: fix pptable use-after-free",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2026-74450",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"version": "2.0.3",
"timestamp": "2026-10-16T18:56:51.440492Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-16T19:05:46.575Z"
}
}
]
}
}
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