{ "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": "2026-08-23T12:47:19.009Z" }, "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" } } } }