CVE-2026-74450

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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 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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": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1684d3ba488529266ce6f97b88076bd185f4790e", "lessThan": "3fbb3ac75000e3187f500a91a4099b24206866a1", "versionType": "git"}, {"status": "affected", "version": "1684d3ba488529266ce6f97b88076bd185f4790e", "lessThan": "9efc767335234cf7a892e46d45cd453b711421e7", "versionType": "git"}, {"status": "affected", "version": "1684d3ba488529266ce6f97b88076bd185f4790e", "lessThan": "81b5af1fb0f14cace6c3b3130a05e5602a597820", "versionType": "git"}, {"status": "affected", "version": "1684d3ba488529266ce6f97b88076bd185f4790e", "lessThan": "8c685df5c3b261c42505110965b42f9a754eb9b7", "versionType": "git"}, {"status": "affected", "version": "1684d3ba488529266ce6f97b88076bd185f4790e", "lessThan": "b628f2c6feb3a115ea72d3120a2bd94afc5163df", "versionType": "git"}, {"status": "affected", "version": "1684d3ba488529266ce6f97b88076bd185f4790e", "lessThan": "bb493058c35c8676e48269ab6732688ea733d23c", "versionType": "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"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.9"}, {"status": "unaffected", "version": "0", "lessThan": "4.9", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.184", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.153", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.105", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.46", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.8", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "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"], "defaultStatus": "affected"}], "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"}], "x_generator": {"engine": "bippy-1.2.0"}, "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. 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Keep the size-only query for attribute discovery without exposing\nthe driver-owned pointer.\n\n(cherry picked from commit f6eed7acfd30099ef7baeb6ba45bb59daad80631)"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.184", "versionStartIncluding": "4.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.153", "versionStartIncluding": "4.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.105", "versionStartIncluding": "4.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.46", "versionStartIncluding": "4.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.8", "versionStartIncluding": "4.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "4.9"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-23T12:47:19.009Z"}}}, "cveMetadata": {"cveId": "CVE-2026-74450", "state": "PUBLISHED", "dateUpdated": "2026-10-16T19:05:46.575Z", "dateReserved": "2026-08-15T05:44:03.899Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T12:26:55.127Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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{"bugzilla": {"description": "kernel: drm/amd/pm: fix pptable use-after-free", "id": "2517062", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517062"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/amd/pm: fix pptable use-after-free\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.\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(cherry picked from commit f6eed7acfd30099ef7baeb6ba45bb59daad80631)", "A flaw was found in the Linux kernel's AMD GPU power management component. This vulnerability, known as a use-after-free, occurs when the system attempts to access memory that has already been released. A local attacker could potentially exploit this flaw to cause a system crash (denial of service) or, in more severe scenarios, execute arbitrary code with elevated privileges."], "name": "CVE-2026-74450", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74450\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74450\nhttps://lore.kernel.org/linux-cve-announce/2026081530-CVE-2026-74450-c478@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1684d3ba488529266ce6f97b88076bd185f4790e,b628f2c6feb3a115ea72d3120a2bd94afc5163df)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1684d3ba488529266ce6f97b88076bd185f4790e,bb493058c35c8676e48269ab6732688ea733d23c)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.8,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc6,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T16:00:07.794745+00:00", "updated": "2026-08-22T01:30:17.263406+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}