{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50303","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-09-15T14:18:36.812Z","datePublished":"2025-09-15T14:45:58.735Z","dateUpdated":"2026-08-15T12:23:17.587Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-15T12:23:17.587Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Fix double release compute pasid\n\nIf kfd_process_device_init_vm returns failure after vm is converted to\ncompute vm and vm->pasid set to compute pasid, KFD will not take\npdd->drm_file reference. As a result, drm close file handler maybe\ncalled to release the compute pasid before KFD process destroy worker to\nrelease the same pasid and set vm->pasid to zero, this generates below\nWARNING backtrace and NULL pointer access.\n\nAdd helper amdgpu_amdkfd_gpuvm_set_vm_pasid and call it at the last step\nof kfd_process_device_init_vm, to ensure vm pasid is the original pasid\nif acquiring vm failed or is the compute pasid with pdd->drm_file\nreference taken to avoid double release same pasid.\n\n amdgpu: Failed to create process VM object\n ida_free called for id=32770 which is not allocated.\n WARNING: CPU: 57 PID: 72542 at ../lib/idr.c:522 ida_free+0x96/0x140\n RIP: 0010:ida_free+0x96/0x140\n Call Trace:\n  amdgpu_pasid_free_delayed+0xe1/0x2a0 [amdgpu]\n  amdgpu_driver_postclose_kms+0x2d8/0x340 [amdgpu]\n  drm_file_free.part.13+0x216/0x270 [drm]\n  drm_close_helper.isra.14+0x60/0x70 [drm]\n  drm_release+0x6e/0xf0 [drm]\n  __fput+0xcc/0x280\n  ____fput+0xe/0x20\n  task_work_run+0x96/0xc0\n  do_exit+0x3d0/0xc10\n\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n RIP: 0010:ida_free+0x76/0x140\n Call Trace:\n  amdgpu_pasid_free_delayed+0xe1/0x2a0 [amdgpu]\n  amdgpu_driver_postclose_kms+0x2d8/0x340 [amdgpu]\n  drm_file_free.part.13+0x216/0x270 [drm]\n  drm_close_helper.isra.14+0x60/0x70 [drm]\n  drm_release+0x6e/0xf0 [drm]\n  __fput+0xcc/0x280\n  ____fput+0xe/0x20\n  task_work_run+0x96/0xc0\n  do_exit+0x3d0/0xc10"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - Reachable only via local ioctls on /dev/kfd (AMDKFD_IOC_ACQUIRE_VM) together with an amdgpu DRM render-node fd; no network or adjacent-protocol path exists.\nAC:L - An unprivileged GPU user can induce post-PASID-assignment failure (e.g., memory pressure in init_kfd_vm or GPUVM alloc for IB/CWSR) and then close the DRM fd before KFD teardown, fully controlling the double-free sequence.\nPR:L - Requires only ordinary access to /dev/kfd and render nodes (render group / seat uaccess, mode 0660); AMDKFD_IOC_ACQUIRE_VM has no capability flag and does not need root.\nUI:N - The attacker triggers the failing acquire_vm ioctl and subsequent fd close/exit entirely with their own process; no victim action is required.\nS:U - Impact stays within the host kernel’s authority (local DoS / same-host GPU PASID isolation failure); this is not a VM escape or cross-authority boundary breach.\nC:H - Double-free of the PASID ID allows reallocation to another process between frees, enabling PASID/IOMMU address-space confusion and cross-process GPU memory disclosure in the worst reasonable deployment.\nI:H - The same PASID reuse can overwrite VM lookups in the PASID xarray and break IOMMU isolation, giving a path to corrupt another process’s GPU address space; double-free is treated as high integrity impact.\nA:H - The documented second ida_free hits a NULL bitmap and causes a kernel NULL-pointer dereference/oops, reliably denying service."}]}],"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/amdgpu/amdgpu_amdkfd.h","drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c","drivers/gpu/drm/amd/amdkfd/kfd_process.c"],"versions":[{"version":"1685b01a858872075bc258a350153de0c7e95404","lessThan":"89f0d766c9e3fdeafbed6f855d433c2768cde862","status":"affected","versionType":"git"},{"version":"1685b01a858872075bc258a350153de0c7e95404","lessThan":"a02c07b619899179384fde06f951530438a3512d","status":"affected","versionType":"git"},{"version":"1685b01a858872075bc258a350153de0c7e95404","lessThan":"1a799c4c190ea9f0e81028e3eb3037ed0ab17ff5","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/amdgpu/amdgpu_amdkfd.h","drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c","drivers/gpu/drm/amd/amdkfd/kfd_process.c"],"versions":[{"version":"4.20","status":"affected"},{"version":"0","lessThan":"4.20","status":"unaffected","versionType":"semver"},{"version":"6.0.19","lessThanOrEqual":"6.0.*","status":"unaffected","versionType":"semver"},{"version":"6.1.5","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2","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":"4.20","versionEndExcluding":"6.0.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"6.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/89f0d766c9e3fdeafbed6f855d433c2768cde862"},{"url":"https://git.kernel.org/stable/c/a02c07b619899179384fde06f951530438a3512d"},{"url":"https://git.kernel.org/stable/c/1a799c4c190ea9f0e81028e3eb3037ed0ab17ff5"}],"title":"drm/amdkfd: Fix double release compute pasid","x_generator":{"engine":"bippy-1.2.0"}}}}