264 lines
14 KiB
JSON
264 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-93177",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-17T16:02:15.091Z",
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"datePublished": "2026-09-17T16:12:05.955Z",
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"dateUpdated": "2026-10-19T09:06:49.236Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:06:49.236Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
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"baseScore": 7.3,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c"
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],
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"versions": [
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{
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"version": "f83a9991648bb4023a53104db699e99305890d51",
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"lessThan": "206e478810d6af50b25d8da72e3af8d55a014365",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f83a9991648bb4023a53104db699e99305890d51",
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"lessThan": "25dedc13ceb9b6109c79c92a726ca4ca017c9eaa",
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"status": "affected",
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"versionType": "git"
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},
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{
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"lessThan": "ae25c92d91f2cb90ede2b0eb0f58efa82ccc718b",
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"status": "affected",
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{
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"lessThan": "b349dcf061a6dc8c6cef9a10530331ef2ff66c72",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f83a9991648bb4023a53104db699e99305890d51",
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"lessThan": "dfe89f1a0c7f40ef858b93881198f9728df956cf",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f83a9991648bb4023a53104db699e99305890d51",
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"lessThan": "46d27e56dbd6345b9c7b62b67ec57407bf3bf29a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f83a9991648bb4023a53104db699e99305890d51",
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"lessThan": "06aef6dcc1d52da5112cbcde39c062e493247ab5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "f83a9991648bb4023a53104db699e99305890d51",
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"lessThan": "6fa33f594e46e775a94097f71b486d7b006b6917",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c"
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],
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"versions": [
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{
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"version": "4.12",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.12",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.270",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.221",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.188",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.157",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.110",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.52",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.6",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"versionStartIncluding": "4.12",
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/206e478810d6af50b25d8da72e3af8d55a014365"
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},
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{
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"url": "https://git.kernel.org/stable/c/25dedc13ceb9b6109c79c92a726ca4ca017c9eaa"
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},
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{
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"url": "https://git.kernel.org/stable/c/ae25c92d91f2cb90ede2b0eb0f58efa82ccc718b"
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},
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{
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"url": "https://git.kernel.org/stable/c/b349dcf061a6dc8c6cef9a10530331ef2ff66c72"
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},
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{
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"url": "https://git.kernel.org/stable/c/dfe89f1a0c7f40ef858b93881198f9728df956cf"
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},
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{
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"url": "https://git.kernel.org/stable/c/46d27e56dbd6345b9c7b62b67ec57407bf3bf29a"
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},
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{
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"url": "https://git.kernel.org/stable/c/06aef6dcc1d52da5112cbcde39c062e493247ab5"
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},
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{
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"url": "https://git.kernel.org/stable/c/6fa33f594e46e775a94097f71b486d7b006b6917"
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}
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],
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"title": "drm/amdgpu/pm/powerplay: bounds-check voltage index in Vega10 lookup",
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"x_generator": {
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"engine": "bippy-1.2.0"
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} |