CVE-2025-21780 (GCVE-0-2025-21780)
Vulnerability from cvelistv5
Published
2025-02-27 02:18
Modified
2026-08-05 11:54
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: avoid buffer overflow attach in smu_sys_set_pp_table() It malicious user provides a small pptable through sysfs and then a bigger pptable, it may cause buffer overflow attack in function smu_sys_set_pp_table().
References
Impacted products
Vendor Product Version
Linux Linux Version: 137d63abbf6a0859e79b662e81d21170ecb75e59
Version: 137d63abbf6a0859e79b662e81d21170ecb75e59
Version: 137d63abbf6a0859e79b662e81d21170ecb75e59
Version: 137d63abbf6a0859e79b662e81d21170ecb75e59
Version: 137d63abbf6a0859e79b662e81d21170ecb75e59
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there is no remote or adjacent-network path to smu_sys_set_pp_table().\\nAC:L - Triggering is fully deterministic \\u2014 write a tiny pptable whose 16-bit usStructureSize matches the write length, then write a larger one; there is no race, no ASLR dependency, and the attacker chooses both the allocation size and the overflow length/content.\\nPR:L - The attribute is 0644 by default, but on AMD desktop/handheld/gaming deployments the amdgpu pp_* power-tuning nodes are routinely made group-writable via udev rules so unprivileged GUI overclocking tools can use them, and the fix\u0027s own changelog describes the attacker as a \\\"malicious user\\\"; per the choose-higher rule this is scored as an unprivileged local user rather than init-namespace root.\\nUI:N - The attacker performs two ordinary write() calls on their own; no victim action, mount, or file-open by another user is involved.\\nS:U - The heap corruption occurs in the kernel\u0027s own slab allocator and is confined to the kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\\nC:H - Beyond the write primitive, the stale power_play_table_size makes amdgpu_get_pp_table() memcpy up to PAGE_SIZE-1 bytes out of a 1-byte allocation straight back to userspace, directly disclosing ~4 KB of adjacent kernel heap; the overflow itself also enables arbitrary read via corrupted adjacent objects.\\nI:H - This is an out-of-bounds heap write of up to ~4 KB with fully attacker-chosen contents starting from a kmalloc-8 object, smashing many adjacent slab objects \\u2014 a classic primitive for function-pointer/credential overwrite and privilege escalation.\\nA:H - Overwriting kilobytes of adjacent slab objects and freelist metadata reliably produces slab corruption panics/oopses, and smu_reset() is then invoked with the corrupted power-play table, hanging or wedging the GPU.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"137d63abbf6a0859e79b662e81d21170ecb75e59\", \"lessThan\": \"3484ea33157bc7334f57e64826ec5a4bf992151a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"137d63abbf6a0859e79b662e81d21170ecb75e59\", \"lessThan\": \"e43a8b9c4d700ffec819c5043a48769b3e7d9cab\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"137d63abbf6a0859e79b662e81d21170ecb75e59\", \"lessThan\": \"2498d2db1d35e88a2060ea191ae75dce853dd084\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"137d63abbf6a0859e79b662e81d21170ecb75e59\", \"lessThan\": \"231075c5a8ea54f34b7c4794687baa980814e6de\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"137d63abbf6a0859e79b662e81d21170ecb75e59\", \"lessThan\": \"1abb2648698bf10783d2236a6b4a7ca5e8021699\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.2\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.2\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.129\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.79\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.16\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13.4\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.13.*\"}, {\"status\": \"unaffected\", \"version\": \"6.14\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/3484ea33157bc7334f57e64826ec5a4bf992151a\"}, {\"url\": \"https://git.kernel.org/stable/c/e43a8b9c4d700ffec819c5043a48769b3e7d9cab\"}, {\"url\": \"https://git.kernel.org/stable/c/2498d2db1d35e88a2060ea191ae75dce853dd084\"}, {\"url\": \"https://git.kernel.org/stable/c/231075c5a8ea54f34b7c4794687baa980814e6de\"}, {\"url\": \"https://git.kernel.org/stable/c/1abb2648698bf10783d2236a6b4a7ca5e8021699\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amdgpu: avoid buffer overflow attach in smu_sys_set_pp_table()\\n\\nIt malicious user provides a small pptable through sysfs and then\\na bigger pptable, it may cause buffer overflow attack in function\\nsmu_sys_set_pp_table().\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.129\", \"versionStartIncluding\": \"5.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.79\", \"versionStartIncluding\": \"5.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.16\", \"versionStartIncluding\": \"5.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13.4\", \"versionStartIncluding\": \"5.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.14\", \"versionStartIncluding\": \"5.2\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:54:22.764Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-21780\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:54:22.764Z\", \"dateReserved\": \"2024-12-29T08:45:45.764Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-02-27T02:18:23.543Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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