{"id":"CVE-2026-99106","state":"PUBLISHED","title":"drm/amdgpu: free the userptr ranges when a CS fails after parser_bos","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: free the userptr ranges when a CS fails after parser_bos\n\namdgpu_cs_parser_bos() allocates an HMM range for every userptr entry of\nthe BO list and looks up the user pages. Those ranges are only freed when\namdgpu_cs_parser_bos() itself fails or when amdgpu_cs_submit() checks\nthem under the notifier lock. If amdgpu_cs_patch_jobs(),\namdgpu_cs_vm_handling(), amdgpu_cs_sync_rings() or the early part of\namdgpu_cs_submit() fails, nothing frees them: neither\namdgpu_cs_parser_fini() nor amdgpu_bo_list_free() touch e->range.\n\nEach such CS then leaks the range, its hmm_pfns array (8 bytes per page\nof the userptr BO) and the BO reference the range holds. An IB on a ring\nthat patches the CS in place (e.g. VCN) with an unmapped va_start fails\nin amdgpu_cs_patch_ibs() and takes this path.\n\nFree the ranges on those error paths. Ranges amdgpu_cs_submit() already\ndropped are NULL, so freeing them again is a no-op.\n\n(cherry picked from commit c52a9542ed7cfd527feb938bd0accada2ac8d267)","publishedAt":"2026-10-28T10:34:25.279Z","updatedAt":"2026-10-30T12:41:47.227Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fec8fdb54e8f74d88951c9f998f47bf4f2031fe0","status":"affected","lessThan":"e265221019d20fa162b62baec16c44b5b2ea295b","versionType":"git"},{"version":"fec8fdb54e8f74d88951c9f998f47bf4f2031fe0","status":"affected","lessThan":"79179efd1ad4729cf0ff9e15eb9414f883e4aec2","versionType":"git"},{"version":"fec8fdb54e8f74d88951c9f998f47bf4f2031fe0","status":"affected","lessThan":"6ac46ae5ac561d4fc7d4246ad83d71bed0d9af9a","versionType":"git"},{"version":"fec8fdb54e8f74d88951c9f998f47bf4f2031fe0","status":"affected","lessThan":"2d9d24385201f476a2f754495b71bbac5ba6ea7b","versionType":"git"},{"version":"fec8fdb54e8f74d88951c9f998f47bf4f2031fe0","status":"affected","lessThan":"1b4da805a0ba354a549ce07459c871c17dd94fe0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.161","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.115","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.59","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.13","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c"]}],"references":["https://git.kernel.org/stable/c/e265221019d20fa162b62baec16c44b5b2ea295b","https://git.kernel.org/stable/c/79179efd1ad4729cf0ff9e15eb9414f883e4aec2","https://git.kernel.org/stable/c/6ac46ae5ac561d4fc7d4246ad83d71bed0d9af9a","https://git.kernel.org/stable/c/2d9d24385201f476a2f754495b71bbac5ba6ea7b","https://git.kernel.org/stable/c/1b4da805a0ba354a549ce07459c871c17dd94fe0"],"weaknesses":[],"ingestedAt":"2026-10-30T13:02:04.640Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/99xxx/CVE-2026-99106.json","commit":"cb14bf1b43b0c9f05f7f40eae2246263fd430780","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99106","state":"PUBLISHED","datePublished":"2026-10-28T10:34:25.279Z","dateUpdated":"2026-10-30T12:41:47.227Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.391Z"},"containers":{"cna":{"title":"drm/amdgpu: free the userptr ranges when a CS fails after parser_bos","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: free the userptr ranges when a CS fails after parser_bos\n\namdgpu_cs_parser_bos() allocates an HMM range for every userptr entry of\nthe BO list and looks up the user pages. Those ranges are only freed when\namdgpu_cs_parser_bos() itself fails or when amdgpu_cs_submit() checks\nthem under the notifier lock. If amdgpu_cs_patch_jobs(),\namdgpu_cs_vm_handling(), amdgpu_cs_sync_rings() or the early part of\namdgpu_cs_submit() fails, nothing frees them: neither\namdgpu_cs_parser_fini() nor amdgpu_bo_list_free() touch e->range.\n\nEach such CS then leaks the range, its hmm_pfns array (8 bytes per page\nof the userptr BO) and the BO reference the range holds. An IB on a ring\nthat patches the CS in place (e.g. VCN) with an unmapped va_start fails\nin amdgpu_cs_patch_ibs() and takes this path.\n\nFree the ranges on those error paths. Ranges amdgpu_cs_submit() already\ndropped are NULL, so freeing them again is a no-op.\n\n(cherry picked from commit c52a9542ed7cfd527feb938bd0accada2ac8d267)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fec8fdb54e8f74d88951c9f998f47bf4f2031fe0","status":"affected","lessThan":"e265221019d20fa162b62baec16c44b5b2ea295b","versionType":"git"},{"version":"fec8fdb54e8f74d88951c9f998f47bf4f2031fe0","status":"affected","lessThan":"79179efd1ad4729cf0ff9e15eb9414f883e4aec2","versionType":"git"},{"version":"fec8fdb54e8f74d88951c9f998f47bf4f2031fe0","status":"affected","lessThan":"6ac46ae5ac561d4fc7d4246ad83d71bed0d9af9a","versionType":"git"},{"version":"fec8fdb54e8f74d88951c9f998f47bf4f2031fe0","status":"affected","lessThan":"2d9d24385201f476a2f754495b71bbac5ba6ea7b","versionType":"git"},{"version":"fec8fdb54e8f74d88951c9f998f47bf4f2031fe0","status":"affected","lessThan":"1b4da805a0ba354a549ce07459c871c17dd94fe0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.161","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.115","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.59","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.13","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e265221019d20fa162b62baec16c44b5b2ea295b"},{"url":"https://git.kernel.org/stable/c/79179efd1ad4729cf0ff9e15eb9414f883e4aec2"},{"url":"https://git.kernel.org/stable/c/6ac46ae5ac561d4fc7d4246ad83d71bed0d9af9a"},{"url":"https://git.kernel.org/stable/c/2d9d24385201f476a2f754495b71bbac5ba6ea7b"},{"url":"https://git.kernel.org/stable/c/1b4da805a0ba354a549ce07459c871c17dd94fe0"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:41:47.227Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.161"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.12.115"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.18.59"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"7.2.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}