{"id":"CVE-2026-46229","state":"PUBLISHED","title":"drm/amdkfd: Clear VRAM on allocation to prevent stale data exposure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Clear VRAM on allocation to prevent stale data exposure\n\nKFD VRAM allocations set AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE\nbut not AMDGPU_GEM_CREATE_VRAM_CLEARED, leaving freshly allocated\nVRAM with stale data from prior use observable by compute kernels.\n\nThe GEM ioctl path already sets VRAM_CLEARED for all userspace\nallocations via amdgpu_gem_create_ioctl() and\namdgpu_mode_dumb_create(). The KFD path was missing this flag,\nallowing stale page table remnants to leak into user buffers.\n\nThis causes crashes in RCCL P2P transport where non-zero data in\nptrExchange/head/tail fields corrupts the protocol handshake.","publishedAt":"2026-05-28T09:40:51.300Z","updatedAt":"2026-10-30T12:26:10.964Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6856e4b65f64eeb3f17148f79b36c1d60c627529","status":"affected","lessThan":"6bcf59545c84a5105d14d59f40069ef4c033584e","versionType":"git"},{"version":"6856e4b65f64eeb3f17148f79b36c1d60c627529","status":"affected","lessThan":"1db431380879fd9d28b763a88a0c0431be5be8df","versionType":"git"},{"version":"6856e4b65f64eeb3f17148f79b36c1d60c627529","status":"affected","lessThan":"32b153658f017ad2f5bf8aab479e8d16ac95bc3a","versionType":"git"},{"version":"6856e4b65f64eeb3f17148f79b36c1d60c627529","status":"affected","lessThan":"77d0b5d11387071770246fd0185a69fa28e8e109","versionType":"git"},{"version":"6856e4b65f64eeb3f17148f79b36c1d60c627529","status":"affected","lessThan":"047d44d8d29a6a1a5757256837aa9dd78e3cd0b5","versionType":"git"},{"version":"6856e4b65f64eeb3f17148f79b36c1d60c627529","status":"affected","lessThan":"ad52d61d82181dbdb7f05826de38352d5e550cc2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.90","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.32","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.9","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","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_amdkfd_gpuvm.c"]}],"references":["https://git.kernel.org/stable/c/6bcf59545c84a5105d14d59f40069ef4c033584e","https://git.kernel.org/stable/c/1db431380879fd9d28b763a88a0c0431be5be8df","https://git.kernel.org/stable/c/32b153658f017ad2f5bf8aab479e8d16ac95bc3a","https://git.kernel.org/stable/c/77d0b5d11387071770246fd0185a69fa28e8e109","https://git.kernel.org/stable/c/047d44d8d29a6a1a5757256837aa9dd78e3cd0b5","https://git.kernel.org/stable/c/ad52d61d82181dbdb7f05826de38352d5e550cc2"],"weaknesses":[],"ingestedAt":"2026-10-30T12:44:04.813Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46229.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46229","state":"PUBLISHED","datePublished":"2026-05-28T09:40:51.300Z","dateUpdated":"2026-10-30T12:26:10.964Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.106Z"},"containers":{"cna":{"title":"drm/amdkfd: Clear VRAM on allocation to prevent stale data exposure","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Clear VRAM on allocation to prevent stale data exposure\n\nKFD VRAM allocations set AMDGPU_GEM_CREATE_VRAM_WIPE_ON_RELEASE\nbut not AMDGPU_GEM_CREATE_VRAM_CLEARED, leaving freshly allocated\nVRAM with stale data from prior use observable by compute kernels.\n\nThe GEM ioctl path already sets VRAM_CLEARED for all userspace\nallocations via amdgpu_gem_create_ioctl() and\namdgpu_mode_dumb_create(). The KFD path was missing this flag,\nallowing stale page table remnants to leak into user buffers.\n\nThis causes crashes in RCCL P2P transport where non-zero data in\nptrExchange/head/tail fields corrupts the protocol handshake."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6856e4b65f64eeb3f17148f79b36c1d60c627529","status":"affected","lessThan":"6bcf59545c84a5105d14d59f40069ef4c033584e","versionType":"git"},{"version":"6856e4b65f64eeb3f17148f79b36c1d60c627529","status":"affected","lessThan":"1db431380879fd9d28b763a88a0c0431be5be8df","versionType":"git"},{"version":"6856e4b65f64eeb3f17148f79b36c1d60c627529","status":"affected","lessThan":"32b153658f017ad2f5bf8aab479e8d16ac95bc3a","versionType":"git"},{"version":"6856e4b65f64eeb3f17148f79b36c1d60c627529","status":"affected","lessThan":"77d0b5d11387071770246fd0185a69fa28e8e109","versionType":"git"},{"version":"6856e4b65f64eeb3f17148f79b36c1d60c627529","status":"affected","lessThan":"047d44d8d29a6a1a5757256837aa9dd78e3cd0b5","versionType":"git"},{"version":"6856e4b65f64eeb3f17148f79b36c1d60c627529","status":"affected","lessThan":"ad52d61d82181dbdb7f05826de38352d5e550cc2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.4","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.90","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.32","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.9","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","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_amdkfd_gpuvm.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6bcf59545c84a5105d14d59f40069ef4c033584e"},{"url":"https://git.kernel.org/stable/c/1db431380879fd9d28b763a88a0c0431be5be8df"},{"url":"https://git.kernel.org/stable/c/32b153658f017ad2f5bf8aab479e8d16ac95bc3a"},{"url":"https://git.kernel.org/stable/c/77d0b5d11387071770246fd0185a69fa28e8e109"},{"url":"https://git.kernel.org/stable/c/047d44d8d29a6a1a5757256837aa9dd78e3cd0b5"},{"url":"https://git.kernel.org/stable/c/ad52d61d82181dbdb7f05826de38352d5e550cc2"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:26:10.964Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.6.140"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.12.90"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"6.18.32"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"7.0.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}