{"api_version":"1","generated_at":"2026-05-14T02:19:36+00:00","cve":"CVE-2026-43400","urls":{"html":"https://cve.report/CVE-2026-43400","api":"https://cve.report/api/cve/CVE-2026-43400.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43400","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43400"},"summary":{"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)","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-08 15:16:51","updated_at":"2026-05-12 14:10:27"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/46630d966b99b0fc6cb01fef4110587f3375a0c0","name":"https://git.kernel.org/stable/c/46630d966b99b0fc6cb01fef4110587f3375a0c0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ea78f8c68f4f6211c557df49174c54d167821962","name":"https://git.kernel.org/stable/c/ea78f8c68f4f6211c557df49174c54d167821962","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6fff5204d8aa26b1be50b6427f833bd3e8899c4f","name":"https://git.kernel.org/stable/c/6fff5204d8aa26b1be50b6427f833bd3e8899c4f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43400","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43400","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a292fdecd72834b3bec380baa5db1e69e7f70679 6fff5204d8aa26b1be50b6427f833bd3e8899c4f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a292fdecd72834b3bec380baa5db1e69e7f70679 46630d966b99b0fc6cb01fef4110587f3375a0c0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a292fdecd72834b3bec380baa5db1e69e7f70679 ea78f8c68f4f6211c557df49174c54d167821962 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.16","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.19 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.9 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"43400","cve":"CVE-2026-43400","epss":"0.000170000","percentile":"0.041320000","score_date":"2026-05-12","updated_at":"2026-05-13 00:11:53"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"6fff5204d8aa26b1be50b6427f833bd3e8899c4f","status":"affected","version":"a292fdecd72834b3bec380baa5db1e69e7f70679","versionType":"git"},{"lessThan":"46630d966b99b0fc6cb01fef4110587f3375a0c0","status":"affected","version":"a292fdecd72834b3bec380baa5db1e69e7f70679","versionType":"git"},{"lessThan":"ea78f8c68f4f6211c557df49174c54d167821962","status":"affected","version":"a292fdecd72834b3bec380baa5db1e69e7f70679","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.16"},{"lessThan":"6.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.19","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.19","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.9","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.16","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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)"}],"providerMetadata":{"dateUpdated":"2026-05-11T22:23:51.059Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}],"title":"drm/amdgpu: add upper bound check on user inputs in signal ioctl","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43400","datePublished":"2026-05-08T14:21:42.225Z","dateReserved":"2026-05-01T14:12:56.007Z","dateUpdated":"2026-05-11T22:23:51.059Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-08 15:16:51","lastModifiedDate":"2026-05-12 14:10:27","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43400","Ordinal":"1","Title":"drm/amdgpu: add upper bound check on user inputs in signal ioctl","CVE":"CVE-2026-43400","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43400","Ordinal":"1","NoteData":"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)","Type":"Description","Title":"drm/amdgpu: add upper bound check on user inputs in signal ioctl"}]}}}