{"id":"CVE-2026-97928","state":"PUBLISHED","title":"drm/amdgpu: skip the VMID 0 flush for VRAM","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: skip the VMID 0 flush for VRAM\n\nClear-on-release only runs on VRAM, which amdgpu_ttm_map_buffer() reaches\nvia its direct MC address without programming a GART window, yet the wipe\nstill forces a VMID 0 flush. On GFX11 (e.g. Navi33) that spurious SDMA\nflush can wedge the engine; only flush when a GART window is actually used.\n\nv2: Let amdgpu_ttm_map_buffer() return whether the VMID 0 flush is needed,\n    and drive the clear and copy paths from that. (Christian)\nv3: Make the vm_needs_flush output parameter mandatory instead of\n    allowing NULL. (Christian)\n\n(cherry picked from commit a306e406e570b74318ff7d80e5b07b540ca1d3a9)","publishedAt":"2026-09-25T10:22:45.430Z","updatedAt":"2026-10-21T12:53:39.969Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a68c7eaa7a8ffdec9287ba1561a668d674c20a13","status":"affected","lessThan":"6593494733ccaf691db7bd13801583d188409607","versionType":"git"},{"version":"a68c7eaa7a8ffdec9287ba1561a668d674c20a13","status":"affected","lessThan":"30dacb56f07283a1acb353ce81baef31f85396b0","versionType":"git"},{"version":"a68c7eaa7a8ffdec9287ba1561a668d674c20a13","status":"affected","lessThan":"241d7450cf75969cea450eb3e740cb9682f69c2f","versionType":"git"},{"version":"a68c7eaa7a8ffdec9287ba1561a668d674c20a13","status":"affected","lessThan":"87ceb8cba73d0b3c4025ff42495bccd8164acaed","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.10","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","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_ttm.c"]}],"references":["https://git.kernel.org/stable/c/6593494733ccaf691db7bd13801583d188409607","https://git.kernel.org/stable/c/30dacb56f07283a1acb353ce81baef31f85396b0","https://git.kernel.org/stable/c/241d7450cf75969cea450eb3e740cb9682f69c2f","https://git.kernel.org/stable/c/87ceb8cba73d0b3c4025ff42495bccd8164acaed"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/97xxx/CVE-2026-97928.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-97928","state":"PUBLISHED","datePublished":"2026-09-25T10:22:45.430Z","dateUpdated":"2026-10-21T12:53:39.969Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:18:58.203Z"},"containers":{"cna":{"title":"drm/amdgpu: skip the VMID 0 flush for VRAM","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: skip the VMID 0 flush for VRAM\n\nClear-on-release only runs on VRAM, which amdgpu_ttm_map_buffer() reaches\nvia its direct MC address without programming a GART window, yet the wipe\nstill forces a VMID 0 flush. On GFX11 (e.g. Navi33) that spurious SDMA\nflush can wedge the engine; only flush when a GART window is actually used.\n\nv2: Let amdgpu_ttm_map_buffer() return whether the VMID 0 flush is needed,\n    and drive the clear and copy paths from that. (Christian)\nv3: Make the vm_needs_flush output parameter mandatory instead of\n    allowing NULL. (Christian)\n\n(cherry picked from commit a306e406e570b74318ff7d80e5b07b540ca1d3a9)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a68c7eaa7a8ffdec9287ba1561a668d674c20a13","status":"affected","lessThan":"6593494733ccaf691db7bd13801583d188409607","versionType":"git"},{"version":"a68c7eaa7a8ffdec9287ba1561a668d674c20a13","status":"affected","lessThan":"30dacb56f07283a1acb353ce81baef31f85396b0","versionType":"git"},{"version":"a68c7eaa7a8ffdec9287ba1561a668d674c20a13","status":"affected","lessThan":"241d7450cf75969cea450eb3e740cb9682f69c2f","versionType":"git"},{"version":"a68c7eaa7a8ffdec9287ba1561a668d674c20a13","status":"affected","lessThan":"87ceb8cba73d0b3c4025ff42495bccd8164acaed","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.10","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","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_ttm.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6593494733ccaf691db7bd13801583d188409607"},{"url":"https://git.kernel.org/stable/c/30dacb56f07283a1acb353ce81baef31f85396b0"},{"url":"https://git.kernel.org/stable/c/241d7450cf75969cea450eb3e740cb9682f69c2f"},{"url":"https://git.kernel.org/stable/c/87ceb8cba73d0b3c4025ff42495bccd8164acaed"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:53:39.969Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}