{"id":"CVE-2026-99150","revision":"92939c81179d4c4d9c44fae64b7d82bb","records":[{"revision":"92939c81179d4c4d9c44fae64b7d82bb","observedAt":"2026-10-28T11:27:43.363+00:00","statement":{"source":"cve-program","id":"CVE-2026-99150","aliases":[],"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":0,"publishedAt":"2026-10-28T10:35:05.753+00:00","modifiedAt":"2026-10-28T10:35:05.753+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"9eee152aab56d374edb9ad21b3db05f5cdda2fe6\",\n                            \"lessThan\": \"652b1f26125fe48aed5f4944698a85b457eef491\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9eee152aab56d374edb9ad21b3db05f5cdda2fe6\",\n                            \"lessThan\": \"253555a9baccefffe1f6e5f2fe54363c7c01ebb9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9eee152aab56d374edb9ad21b3db05f5cdda2fe6\",\n                            \"lessThan\": \"de9f6bcdb44f0e410031002e2f103826ea6b6259\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"865e2dbadf6856c9219626fbd6154cac44e5fbca\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"5.8.2\",\n                            \"lessThan\": \"5.9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.9\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.9\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.59\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.13\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/652b1f26125fe48aed5f4944698a85b457eef491","https://git.kernel.org/stable/c/253555a9baccefffe1f6e5f2fe54363c7c01ebb9","https://git.kernel.org/stable/c/de9f6bcdb44f0e410031002e2f103826ea6b6259"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99150","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-99150","identifiers":["CVE-2026-99150"]},"retained":false,"historicalAffected":[]}],"coverage":[]}