{"id":"CVE-2026-43400","state":"PUBLISHED","title":"drm/amdgpu: add upper bound check on user inputs in signal ioctl","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: add upper bound check on user inputs in signal ioctl\n\nHuge input values in amdgpu_userq_signal_ioctl can lead to a OOM and\ncould be exploited.\n\nSo check these input value against AMDGPU_USERQ_MAX_HANDLES\nwhich is big enough value for genuine use cases and could\npotentially avoid OOM.\n\n(cherry picked from commit be267e15f99bc97cbe202cd556717797cdcf79a5)","publishedAt":"2026-05-08T14:21:42.225Z","updatedAt":"2026-05-11T22:23:51.059Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a292fdecd72834b3bec380baa5db1e69e7f70679","status":"affected","lessThan":"6fff5204d8aa26b1be50b6427f833bd3e8899c4f","versionType":"git"},{"version":"a292fdecd72834b3bec380baa5db1e69e7f70679","status":"affected","lessThan":"46630d966b99b0fc6cb01fef4110587f3375a0c0","versionType":"git"},{"version":"a292fdecd72834b3bec380baa5db1e69e7f70679","status":"affected","lessThan":"ea78f8c68f4f6211c557df49174c54d167821962","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.19","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.9","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","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_userq_fence.c"]}],"references":["https://git.kernel.org/stable/c/6fff5204d8aa26b1be50b6427f833bd3e8899c4f","https://git.kernel.org/stable/c/46630d966b99b0fc6cb01fef4110587f3375a0c0","https://git.kernel.org/stable/c/ea78f8c68f4f6211c557df49174c54d167821962"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43400.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43400","state":"PUBLISHED","datePublished":"2026-05-08T14:21:42.225Z","dateUpdated":"2026-05-11T22:23:51.059Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:56.007Z"},"containers":{"cna":{"title":"drm/amdgpu: add upper bound check on user inputs in signal ioctl","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: add upper bound check on user inputs in signal ioctl\n\nHuge input values in amdgpu_userq_signal_ioctl can lead to a OOM and\ncould be exploited.\n\nSo check these input value against AMDGPU_USERQ_MAX_HANDLES\nwhich is big enough value for genuine use cases and could\npotentially avoid OOM.\n\n(cherry picked from commit be267e15f99bc97cbe202cd556717797cdcf79a5)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a292fdecd72834b3bec380baa5db1e69e7f70679","status":"affected","lessThan":"6fff5204d8aa26b1be50b6427f833bd3e8899c4f","versionType":"git"},{"version":"a292fdecd72834b3bec380baa5db1e69e7f70679","status":"affected","lessThan":"46630d966b99b0fc6cb01fef4110587f3375a0c0","versionType":"git"},{"version":"a292fdecd72834b3bec380baa5db1e69e7f70679","status":"affected","lessThan":"ea78f8c68f4f6211c557df49174c54d167821962","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.19","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.9","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","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_userq_fence.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6fff5204d8aa26b1be50b6427f833bd3e8899c4f"},{"url":"https://git.kernel.org/stable/c/46630d966b99b0fc6cb01fef4110587f3375a0c0"},{"url":"https://git.kernel.org/stable/c/ea78f8c68f4f6211c557df49174c54d167821962"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:23:51.059Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"6.18.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"6.19.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}