{"api_version":"1","generated_at":"2026-10-29T20:57:26+00:00","cve":"CVE-2026-99150","urls":{"html":"https://cve.report/CVE-2026-99150","api":"https://cve.report/api/cve/CVE-2026-99150.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-99150","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-99150"},"summary":{"title":"drm/amdgpu: don't drop the runtime PM reference twice in amdgpu_gpr","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: don't drop the runtime PM reference twice in amdgpu_gpr\n\namdgpu_debugfs_gpr_read() drops its runtime PM reference right after\nreading the wave registers. When copying them to userspace fails, it\njumps to the err label, which drops the reference a second time. A read\ninto a bad buffer on Navi31 either steals a reference somebody else\nholds (power/runtime_usage goes from 1 to 0) or underflows the count:\n\n  amdgpu 0000:03:00.0: Runtime PM usage count underflow!\n\nThe registers are already in the kernel buffer at that point, so finish\nthe hardware access first and copy the buffer with a single\ncopy_to_user() instead of the put_user() loop with its own error path.\n\n(cherry picked from commit 31035bbd74f7c3e10c163db875b8e67f8b50ee6a)","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-28 11:17:35","updated_at":"2026-10-28 11:17:35"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/253555a9baccefffe1f6e5f2fe54363c7c01ebb9","name":"https://git.kernel.org/stable/c/253555a9baccefffe1f6e5f2fe54363c7c01ebb9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/de9f6bcdb44f0e410031002e2f103826ea6b6259","name":"https://git.kernel.org/stable/c/de9f6bcdb44f0e410031002e2f103826ea6b6259","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/652b1f26125fe48aed5f4944698a85b457eef491","name":"https://git.kernel.org/stable/c/652b1f26125fe48aed5f4944698a85b457eef491","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-99150","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99150","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9eee152aab56d374edb9ad21b3db05f5cdda2fe6 652b1f26125fe48aed5f4944698a85b457eef491 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9eee152aab56d374edb9ad21b3db05f5cdda2fe6 253555a9baccefffe1f6e5f2fe54363c7c01ebb9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9eee152aab56d374edb9ad21b3db05f5cdda2fe6 de9f6bcdb44f0e410031002e2f103826ea6b6259 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 865e2dbadf6856c9219626fbd6154cac44e5fbca git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.8.2 5.9 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.9","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.9 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.59 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.13 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"652b1f26125fe48aed5f4944698a85b457eef491","status":"affected","version":"9eee152aab56d374edb9ad21b3db05f5cdda2fe6","versionType":"git"},{"lessThan":"253555a9baccefffe1f6e5f2fe54363c7c01ebb9","status":"affected","version":"9eee152aab56d374edb9ad21b3db05f5cdda2fe6","versionType":"git"},{"lessThan":"de9f6bcdb44f0e410031002e2f103826ea6b6259","status":"affected","version":"9eee152aab56d374edb9ad21b3db05f5cdda2fe6","versionType":"git"},{"status":"affected","version":"865e2dbadf6856c9219626fbd6154cac44e5fbca","versionType":"git"},{"lessThan":"5.9","status":"affected","version":"5.8.2","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.9"},{"lessThan":"5.9","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.59","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.13","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.59","versionStartIncluding":"5.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.13","versionStartIncluding":"5.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"5.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: don't drop the runtime PM reference twice in amdgpu_gpr\n\namdgpu_debugfs_gpr_read() drops its runtime PM reference right after\nreading the wave registers. When copying them to userspace fails, it\njumps to the err label, which drops the reference a second time. A read\ninto a bad buffer on Navi31 either steals a reference somebody else\nholds (power/runtime_usage goes from 1 to 0) or underflows the count:\n\n  amdgpu 0000:03:00.0: Runtime PM usage count underflow!\n\nThe registers are already in the kernel buffer at that point, so finish\nthe hardware access first and copy the buffer with a single\ncopy_to_user() instead of the put_user() loop with its own error path.\n\n(cherry picked from commit 31035bbd74f7c3e10c163db875b8e67f8b50ee6a)"}],"providerMetadata":{"dateUpdated":"2026-10-28T10:35:05.753Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/652b1f26125fe48aed5f4944698a85b457eef491"},{"url":"https://git.kernel.org/stable/c/253555a9baccefffe1f6e5f2fe54363c7c01ebb9"},{"url":"https://git.kernel.org/stable/c/de9f6bcdb44f0e410031002e2f103826ea6b6259"}],"title":"drm/amdgpu: don't drop the runtime PM reference twice in amdgpu_gpr","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-99150","datePublished":"2026-10-28T10:35:05.753Z","dateReserved":"2026-09-25T10:25:14.396Z","dateUpdated":"2026-10-28T10:35:05.753Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-28 11:17:35","lastModifiedDate":"2026-10-28 11:17:35","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"99150","Ordinal":"1","Title":"drm/amdgpu: don't drop the runtime PM reference twice in amdgpu_","CVE":"CVE-2026-99150","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"99150","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: don't drop the runtime PM reference twice in amdgpu_gpr\n\namdgpu_debugfs_gpr_read() drops its runtime PM reference right after\nreading the wave registers. When copying them to userspace fails, it\njumps to the err label, which drops the reference a second time. A read\ninto a bad buffer on Navi31 either steals a reference somebody else\nholds (power/runtime_usage goes from 1 to 0) or underflows the count:\n\n  amdgpu 0000:03:00.0: Runtime PM usage count underflow!\n\nThe registers are already in the kernel buffer at that point, so finish\nthe hardware access first and copy the buffer with a single\ncopy_to_user() instead of the put_user() loop with its own error path.\n\n(cherry picked from commit 31035bbd74f7c3e10c163db875b8e67f8b50ee6a)","Type":"Description","Title":"drm/amdgpu: don't drop the runtime PM reference twice in amdgpu_"}]}}}