{ "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 → pp_dpm_set_pp_table → amd_powerplay_reset → 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": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.18.52" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.2.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/206e478810d6af50b25d8da72e3af8d55a014365" }, { "url": "https://git.kernel.org/stable/c/25dedc13ceb9b6109c79c92a726ca4ca017c9eaa" }, { "url": "https://git.kernel.org/stable/c/ae25c92d91f2cb90ede2b0eb0f58efa82ccc718b" }, { "url": "https://git.kernel.org/stable/c/b349dcf061a6dc8c6cef9a10530331ef2ff66c72" }, { "url": "https://git.kernel.org/stable/c/dfe89f1a0c7f40ef858b93881198f9728df956cf" }, { "url": "https://git.kernel.org/stable/c/46d27e56dbd6345b9c7b62b67ec57407bf3bf29a" }, { "url": "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" } } } }