CVE-2026-80541 (GCVE-0-2026-80541)
Vulnerability from cvelistv5
Published
2026-08-26 14:37
Modified
2026-10-16 19:26
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: validate GEM_CREATE domain combinations AMDGPU_GEM_CREATE checked domain bits against AMDGPU_GEM_DOMAIN_MASK, but did not validate domain combinations. Userspace could combine CPU|GTT|VRAM with DOORBELL, GDS, GWS, or OA, making amdgpu_bo_placement_from_domain() exceed AMDGPU_BO_MAX_PLACEMENTS and hit BUG_ON(). Allow combinations only within CPU/GTT/VRAM, and require non-CPU/GTT/ VRAM domains to be specified one at a time. Return -EINVAL for invalid combinations in amdgpu_gem_create_ioctl(). v2: Rename helper from amdgpu_gem_domain_valid() to amdgpu_gem_are_domains_valid() (Christian) (cherry picked from commit db39852d0c39843cb02048dfb47e4b8c703e9080)
References
Impacted products
Vendor Product Version
Linux Linux Version: 77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd
Version: 77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd
Version: 77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd
Version: 77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd
Version: 77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd
Version: 77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd
Version: 77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd
Version: 77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd
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              "value": "AV:L - The bug is reached only via DRM_IOCTL_AMDGPU_GEM_CREATE on a local amdgpu render node (/dev/dri/renderD*); userspace passes crafted domain flags into amdgpu_gem_create_ioctl(), which calls amdgpu_bo_placement_from_domain() during amdgpu_bo_create(). There is no network, adjacent-radio, or physical-access path to this code.\nAC:L - Triggering is a single deterministic ioctl with an invalid domain bitmask (e.g. CPU|GTT|VRAM|DOORBELL); the attacker fully controls the domains field and needs no race, special memory layout, or victim state. Invalid combinations reliably exceed AMDGPU_BO_MAX_PLACEMENTS (3) and hit BUG_ON() on every attempt.\nPR:L - AMDGPU_GEM_CREATE is registered with DRM_AUTH|DRM_RENDER_ALLOW, so any local unprivileged user who can open the render node (default on desktops, ChromeOS, Steam Deck, and cloud GPU tenants via render/video group or ACL) can invoke it without real root or init-namespace capabilities.\nUI:N - The attacking process performs the GEM_CREATE ioctl itself; no other user must mount a filesystem, open a file, click a link, or take any other action for the invalid domain combination to reach amdgpu_bo_placement_from_domain() and panic the kernel.\nS:U - Impact is confined to host-kernel memory corruption and panic within the amdgpu/TTM driver; it does not cross a VM, IOMMU, or sandbox security boundary, and is standard local kernel privilege-escalation/DoS scope rather than a guest-to-host escape.\nC:H - Before BUG_ON(), amdgpu_bo_placement_from_domain() writes past the fixed placements[AMDGPU_BO_MAX_PLACEMENTS] array into adjacent amdgpu_bo fields (including struct ttm_placement) with attacker-influenced mem_type and flag values; this out-of-bounds write is memory corruption that could be leveraged for kernel info disclosure.\nI:H - The same out-of-bounds placement writes corrupt adjacent kernel heap objects in the amdgpu_bo allocation with partially attacker-controlled ttm_place contents; out-of-bounds writes into kernel structures are classed as high integrity impact and could enable further heap corruption or control-flow hijacking.\nA:H - Once placement count exceeds three the kernel hits BUG_ON(c \u003e AMDGPU_BO_MAX_PLACEMENTS), causing an oops or panic; an unprivileged GPU client on shared AMD hardware (multi-user workstations or cloud GPU nodes) can repeatedly crash the entire host, denying service to all co-tenants."
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There is no network, adjacent-radio, or physical-access path to this code.\\nAC:L - Triggering is a single deterministic ioctl with an invalid domain bitmask (e.g. CPU|GTT|VRAM|DOORBELL); the attacker fully controls the domains field and needs no race, special memory layout, or victim state. 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this out-of-bounds write is memory corruption that could be leveraged for kernel info disclosure.\\nI:H - The same out-of-bounds placement writes corrupt adjacent kernel heap objects in the amdgpu_bo allocation with partially attacker-controlled ttm_place contents; out-of-bounds writes into kernel structures are classed as high integrity impact and could enable further heap corruption or control-flow hijacking.\\nA:H - Once placement count exceeds three the kernel hits BUG_ON(c \u003e AMDGPU_BO_MAX_PLACEMENTS), causing an oops or panic; an unprivileged GPU client on shared AMD hardware (multi-user workstations or cloud GPU nodes) can repeatedly crash the entire host, denying service to all co-tenants.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd\", \"lessThan\": \"5c73485af7ad9c3ae592db3481f370bc07705391\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd\", \"lessThan\": \"584e3d47736fe2e7184ef3fc16b00b41485f96c6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd\", \"lessThan\": \"66133fc05c3af002f45de8a71b833c026ccbfba6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd\", \"lessThan\": \"ce5da474c3ddf7cccec5dce6aa4296297dd7caff\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd\", \"lessThan\": \"493355096e397f9217b41c8574ed2784c7351443\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd\", \"lessThan\": \"220aa2589d7321fb68d2e8597862711b5f22ae0b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd\", \"lessThan\": \"80f0b53860d02577709d69a312a29ca674b9297c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"77a2faa55c1a497f4e7e89eabd11830f0e3cb3dd\", \"lessThan\": \"5e9d136ad74df4edec67e502ce267597064d8f86\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.20\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.20\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.266\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.217\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"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\": \"7.1.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.1.*\"}, {\"status\": \"unaffected\", \"version\": \"7.2\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/5c73485af7ad9c3ae592db3481f370bc07705391\"}, {\"url\": \"https://git.kernel.org/stable/c/584e3d47736fe2e7184ef3fc16b00b41485f96c6\"}, {\"url\": \"https://git.kernel.org/stable/c/66133fc05c3af002f45de8a71b833c026ccbfba6\"}, {\"url\": \"https://git.kernel.org/stable/c/ce5da474c3ddf7cccec5dce6aa4296297dd7caff\"}, {\"url\": \"https://git.kernel.org/stable/c/493355096e397f9217b41c8574ed2784c7351443\"}, {\"url\": \"https://git.kernel.org/stable/c/220aa2589d7321fb68d2e8597862711b5f22ae0b\"}, {\"url\": \"https://git.kernel.org/stable/c/80f0b53860d02577709d69a312a29ca674b9297c\"}, {\"url\": \"https://git.kernel.org/stable/c/5e9d136ad74df4edec67e502ce267597064d8f86\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amdgpu: validate GEM_CREATE domain combinations\\n\\nAMDGPU_GEM_CREATE checked domain bits against AMDGPU_GEM_DOMAIN_MASK,\\nbut did not validate domain combinations. Userspace could combine\\nCPU|GTT|VRAM with DOORBELL, GDS, GWS, or OA, making\\namdgpu_bo_placement_from_domain() exceed AMDGPU_BO_MAX_PLACEMENTS and\\nhit BUG_ON().\\n\\nAllow combinations only within CPU/GTT/VRAM, and require non-CPU/GTT/\\nVRAM domains to be specified one at a time. Return -EINVAL for invalid\\ncombinations in amdgpu_gem_create_ioctl().\\n\\nv2: Rename helper from amdgpu_gem_domain_valid() to\\n    amdgpu_gem_are_domains_valid() (Christian)\\n\\n(cherry picked from commit db39852d0c39843cb02048dfb47e4b8c703e9080)\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.266\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.217\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.184\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.153\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.105\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.46\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.1.10\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.2\", \"versionStartIncluding\": \"4.20\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-27T05:01:30.566Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-80541\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-16T19:26:25.405Z\", \"dateReserved\": \"2026-08-26T14:34:25.765Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-08-26T14:37:14.572Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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