CVE-2026-93177

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93177", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T16:02:15.091Z", "datePublished": "2026-09-17T16:12:05.955Z", "dateUpdated": "2026-10-19T09:06:49.236Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:06:49.236Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/pm/powerplay: bounds-check voltage index in Vega10 lookup\n\nvddInd, vddciInd and mvddInd from VBIOS-parsed tables index into vddc,\nvddci and vddmem lookup tables without bounds checks across nine sites.\nReturn -EINVAL when any index is out of range."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H", "baseScore": 7.3, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - Writing a crafted ATOM Vega10 POWERPLAYTABLE to sysfs pp_table (amdgpu_set_pp_table \u2192 pp_dpm_set_pp_table \u2192 amd_powerplay_reset \u2192 hwmgr_hw_init) makes vega10_pp_tables_initialize copy ucVddInd/ucVddciInd/ucVddMemInd into vddInd; vega10_hwmgr_backend_init then calls vega10_patch_voltage_dependency_tables_with_lookup_table. No network protocol carries those indices.\nAC:L - The attacker fully controls ucVddInd in each ATOM_Vega10 dependency-table entry they write; get_socclk_voltage_dependency_table and get_mclk_voltage_dependency_table copy it verbatim into vddInd, and the unguarded entries[voltage_id].us_vdd load in vega10_patch_voltage_dependency_tables_with_lookup_table is deterministic with no race or victim state.\nPR:L - amdgpu_set_pp_table and pp_dpm_set_pp_table perform no capable() check; the pp_table attribute is created as S_IRUGO|S_IWUSR, and AMD desktop/handheld udev rules commonly grant group write on pp_* nodes so unprivileged overclocking tools can use them (same attribute scored PR:L in CVE-2025-21780 and CVE-2026-74450).\nUI:N - The attacker writes the malformed POWERPLAYTABLE on their own pp_table sysfs node and amd_powerplay_reset runs in that store; no other user must mount a filesystem, plug in a GPU, or open a file.\nS:U - The OOB us_vdd load and later convert_to_vid SMC programming stay inside the host amdgpu powerplay heap and Vega10 SMU tables; they do not cross a KVM/IOMMU guest-host boundary (pp_table writes are rejected for SR-IOV VFs by amdgpu_dpm_is_pp_table_allowed).\nC:H - voltage_id is a uint8_t taken from vddInd, so entries[voltage_id].us_vdd in vega10_patch_voltage_dependency_tables_with_lookup_table reads two bytes at an attacker-chosen offset of up to 255*sizeof(phm_ppt_v1_voltage_lookup_record) (~2.5KB) past a vddc_lookup_table that get_vddc_lookup_table allocated for only 8 entries (4 for vddci/vddmem).\nI:L - The OOB us_vdd is written only into in-bounds vddc/vddci/mvdd fields and later turned into SMC VIDs by convert_to_vid in vega10_populate_single_display_type and vega10_get_vdd_voltage_table, programming out-of-spec GPU rails. That is bounded power-management state corruption, not an arbitrary kernel write.\nA:H - A ~2.5KB heap overread from the kmalloc-flex lookup table can oops or KASAN-panic, and garbage millivolts converted to VID and loaded into Vega10 PPTable_t DisplayClockTable via vega10_populate_single_display_type can hang or reset the GPU."}]}], "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/powerplay/hwmgr/vega10_hwmgr.c"], "versions": [{"version": "f83a9991648bb4023a53104db699e99305890d51", "lessThan": "206e478810d6af50b25d8da72e3af8d55a014365", "status": "affected", "versionType": "git"}, {"version": "f83a9991648bb4023a53104db699e99305890d51", "lessThan": "25dedc13ceb9b6109c79c92a726ca4ca017c9eaa", "status": "affected", "versionType": "git"}, {"version": "f83a9991648bb4023a53104db699e99305890d51", "lessThan": "ae25c92d91f2cb90ede2b0eb0f58efa82ccc718b", "status": "affected", "versionType": "git"}, {"version": "f83a9991648bb4023a53104db699e99305890d51", "lessThan": "b349dcf061a6dc8c6cef9a10530331ef2ff66c72", "status": "affected", "versionType": "git"}, {"version": "f83a9991648bb4023a53104db699e99305890d51", "lessThan": "dfe89f1a0c7f40ef858b93881198f9728df956cf", "status": "affected", "versionType": "git"}, {"version": "f83a9991648bb4023a53104db699e99305890d51", "lessThan": "46d27e56dbd6345b9c7b62b67ec57407bf3bf29a", "status": "affected", "versionType": "git"}, {"version": "f83a9991648bb4023a53104db699e99305890d51", "lessThan": "06aef6dcc1d52da5112cbcde39c062e493247ab5", "status": "affected", "versionType": "git"}, {"version": "f83a9991648bb4023a53104db699e99305890d51", "lessThan": "6fa33f594e46e775a94097f71b486d7b006b6917", "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/powerplay/hwmgr/vega10_hwmgr.c"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "4.12", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": 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"https://git.kernel.org/stable/c/06aef6dcc1d52da5112cbcde39c062e493247ab5"}, {"url": "https://git.kernel.org/stable/c/6fa33f594e46e775a94097f71b486d7b006b6917"}], "title": "drm/amdgpu/pm/powerplay: bounds-check voltage index in Vega10 lookup", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "206e478810d6af50b25d8da72e3af8d55a014365", "status": "affected", "version": "f83a9991648bb4023a53104db699e99305890d51", "versionType": "git"}, {"lessThan": "25dedc13ceb9b6109c79c92a726ca4ca017c9eaa", "status": "affected", "version": "f83a9991648bb4023a53104db699e99305890d51", "versionType": "git"}, {"lessThan": "ae25c92d91f2cb90ede2b0eb0f58efa82ccc718b", "status": "affected", "version": "f83a9991648bb4023a53104db699e99305890d51", "versionType": "git"}, {"lessThan": "b349dcf061a6dc8c6cef9a10530331ef2ff66c72", "status": "affected", "version": "f83a9991648bb4023a53104db699e99305890d51", "versionType": "git"}, {"lessThan": "dfe89f1a0c7f40ef858b93881198f9728df956cf", "status": "affected", "version": "f83a9991648bb4023a53104db699e99305890d51", "versionType": "git"}, {"lessThan": "46d27e56dbd6345b9c7b62b67ec57407bf3bf29a", "status": "affected", "version": "f83a9991648bb4023a53104db699e99305890d51", "versionType": "git"}, {"lessThan": "06aef6dcc1d52da5112cbcde39c062e493247ab5", "status": "affected", "version": "f83a9991648bb4023a53104db699e99305890d51", "versionType": "git"}, {"lessThan": "6fa33f594e46e775a94097f71b486d7b006b6917", "status": "affected", "version": "f83a9991648bb4023a53104db699e99305890d51", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.12"}, {"lessThan": "4.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/pm/powerplay: bounds-check voltage index in Vega10 lookup\n\nvddInd, vddciInd and mvddInd from VBIOS-parsed tables index into vddc,\nvddci and vddmem lookup tables without bounds checks across nine sites.\nReturn -EINVAL when any index is out of range."}], "id": "CVE-2026-93177", "lastModified": "2026-10-19T10:17:08.120", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.5, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-17T17:18:13.500", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/06aef6dcc1d52da5112cbcde39c062e493247ab5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/206e478810d6af50b25d8da72e3af8d55a014365"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/25dedc13ceb9b6109c79c92a726ca4ca017c9eaa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/46d27e56dbd6345b9c7b62b67ec57407bf3bf29a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6fa33f594e46e775a94097f71b486d7b006b6917"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ae25c92d91f2cb90ede2b0eb0f58efa82ccc718b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b349dcf061a6dc8c6cef9a10530331ef2ff66c72"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dfe89f1a0c7f40ef858b93881198f9728df956cf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f83a9991648bb4023a53104db699e99305890d51,206e478810d6af50b25d8da72e3af8d55a014365)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f83a9991648bb4023a53104db699e99305890d51,25dedc13ceb9b6109c79c92a726ca4ca017c9eaa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f83a9991648bb4023a53104db699e99305890d51,ae25c92d91f2cb90ede2b0eb0f58efa82ccc718b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f83a9991648bb4023a53104db699e99305890d51,b349dcf061a6dc8c6cef9a10530331ef2ff66c72)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f83a9991648bb4023a53104db699e99305890d51,dfe89f1a0c7f40ef858b93881198f9728df956cf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f83a9991648bb4023a53104db699e99305890d51,46d27e56dbd6345b9c7b62b67ec57407bf3bf29a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f83a9991648bb4023a53104db699e99305890d51,06aef6dcc1d52da5112cbcde39c062e493247ab5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f83a9991648bb4023a53104db699e99305890d51,6fa33f594e46e775a94097f71b486d7b006b6917)"}}], "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": "4.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.270,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.221,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.188,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "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": "2026-09-19T09:00:14.729146+00:00", "updated": "2026-09-20T03:00:11.236754+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-788"]}