{"api_version":"1","generated_at":"2026-09-18T01:20:09+00:00","cve":"CVE-2026-93067","urls":{"html":"https://cve.report/CVE-2026-93067","api":"https://cve.report/api/cve/CVE-2026-93067.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93067","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93067"},"summary":{"title":"drm/bridge: tc358767: clamp the reported AUX read size to the request","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/bridge: tc358767: clamp the reported AUX read size to the request\n\ntc_aux_transfer() clamps an AUX read to the payload limit:\n\n\tsize_t size = min_t(size_t, DP_AUX_MAX_PAYLOAD_BYTES - 1, msg->size);\n\nAfter the transfer it replaces size with the byte count the controller\nreports in AUX_BYTES:\n\n\tif (size)\n\t\tsize = FIELD_GET(AUX_BYTES, auxstatus);\n\nAUX_BYTES is GENMASK(15, 8), so it can be up to 255. Nothing clamps it\nback to the request. tc_aux_read_data() reads that many bytes into the\n16-byte auxrdata stack buffer, then copies them into the caller buffer. A\nreported count of 255 makes the read run to 256 bytes and overruns both.\n\nThe controller should never report more than it was asked to transfer, so\nthis is defense in depth rather than a live hole. The reported count is\nonly lightly trusted, and the check is cheap. Clamp it back to the request,\nthe same way ti-sn65dsi86 does in commit aca58eac52b8 (\"drm/bridge:\nti-sn65dsi86: Never store more than msg->size bytes in AUX xfer\").","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:18:00","updated_at":"2026-09-17 17:18:00"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/982caa744fce79d18f2920382aaeb0da821a6e73","name":"https://git.kernel.org/stable/c/982caa744fce79d18f2920382aaeb0da821a6e73","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ec6444a00c49e6c2b5e9a507272a28126677f9ee","name":"https://git.kernel.org/stable/c/ec6444a00c49e6c2b5e9a507272a28126677f9ee","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/424b762cc26d512e3e7421e57e41b4b55be2400b","name":"https://git.kernel.org/stable/c/424b762cc26d512e3e7421e57e41b4b55be2400b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/33c0b072e31dee98a754d9bd01800359dfeb9e8f","name":"https://git.kernel.org/stable/c/33c0b072e31dee98a754d9bd01800359dfeb9e8f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9ff718df547372d70ca20ad8e66a3fb1300936b2","name":"https://git.kernel.org/stable/c/9ff718df547372d70ca20ad8e66a3fb1300936b2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ebf00c51c9ac9188e2806a2b842418805ee879be","name":"https://git.kernel.org/stable/c/ebf00c51c9ac9188e2806a2b842418805ee879be","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/57c567e0e8aa76f6e3e8f39d7f40c20bc37e76af","name":"https://git.kernel.org/stable/c/57c567e0e8aa76f6e3e8f39d7f40c20bc37e76af","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dd6274706bec30d005bff0587a4262d01dc2775a","name":"https://git.kernel.org/stable/c/dd6274706bec30d005bff0587a4262d01dc2775a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93067","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93067","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12dfe7c4d9c53442efcb4113cff505f60d654906 ebf00c51c9ac9188e2806a2b842418805ee879be git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12dfe7c4d9c53442efcb4113cff505f60d654906 424b762cc26d512e3e7421e57e41b4b55be2400b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12dfe7c4d9c53442efcb4113cff505f60d654906 dd6274706bec30d005bff0587a4262d01dc2775a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 12dfe7c4d9c53442efcb4113cff505f60d654906 982caa744fce79d18f2920382aaeb0da821a6e73 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/gpu/drm/bridge/tc358767.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ebf00c51c9ac9188e2806a2b842418805ee879be","status":"affected","version":"12dfe7c4d9c53442efcb4113cff505f60d654906","versionType":"git"},{"lessThan":"424b762cc26d512e3e7421e57e41b4b55be2400b","status":"affected","version":"12dfe7c4d9c53442efcb4113cff505f60d654906","versionType":"git"},{"lessThan":"dd6274706bec30d005bff0587a4262d01dc2775a","status":"affected","version":"12dfe7c4d9c53442efcb4113cff505f60d654906","versionType":"git"},{"lessThan":"982caa744fce79d18f2920382aaeb0da821a6e73","status":"affected","version":"12dfe7c4d9c53442efcb4113cff505f60d654906","versionType":"git"},{"lessThan":"33c0b072e31dee98a754d9bd01800359dfeb9e8f","status":"affected","version":"12dfe7c4d9c53442efcb4113cff505f60d654906","versionType":"git"},{"lessThan":"57c567e0e8aa76f6e3e8f39d7f40c20bc37e76af","status":"affected","version":"12dfe7c4d9c53442efcb4113cff505f60d654906","versionType":"git"},{"lessThan":"9ff718df547372d70ca20ad8e66a3fb1300936b2","status":"affected","version":"12dfe7c4d9c53442efcb4113cff505f60d654906","versionType":"git"},{"lessThan":"ec6444a00c49e6c2b5e9a507272a28126677f9ee","status":"affected","version":"12dfe7c4d9c53442efcb4113cff505f60d654906","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/gpu/drm/bridge/tc358767.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.4"},{"lessThan":"5.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"5.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"5.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/bridge: tc358767: clamp the reported AUX read size to the request\n\ntc_aux_transfer() clamps an AUX read to the payload limit:\n\n\tsize_t size = min_t(size_t, DP_AUX_MAX_PAYLOAD_BYTES - 1, msg->size);\n\nAfter the transfer it replaces size with the byte count the controller\nreports in AUX_BYTES:\n\n\tif (size)\n\t\tsize = FIELD_GET(AUX_BYTES, auxstatus);\n\nAUX_BYTES is GENMASK(15, 8), so it can be up to 255. Nothing clamps it\nback to the request. tc_aux_read_data() reads that many bytes into the\n16-byte auxrdata stack buffer, then copies them into the caller buffer. A\nreported count of 255 makes the read run to 256 bytes and overruns both.\n\nThe controller should never report more than it was asked to transfer, so\nthis is defense in depth rather than a live hole. The reported count is\nonly lightly trusted, and the check is cheap. Clamp it back to the request,\nthe same way ti-sn65dsi86 does in commit aca58eac52b8 (\"drm/bridge:\nti-sn65dsi86: Never store more than msg->size bytes in AUX xfer\")."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:10:52.288Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ebf00c51c9ac9188e2806a2b842418805ee879be"},{"url":"https://git.kernel.org/stable/c/424b762cc26d512e3e7421e57e41b4b55be2400b"},{"url":"https://git.kernel.org/stable/c/dd6274706bec30d005bff0587a4262d01dc2775a"},{"url":"https://git.kernel.org/stable/c/982caa744fce79d18f2920382aaeb0da821a6e73"},{"url":"https://git.kernel.org/stable/c/33c0b072e31dee98a754d9bd01800359dfeb9e8f"},{"url":"https://git.kernel.org/stable/c/57c567e0e8aa76f6e3e8f39d7f40c20bc37e76af"},{"url":"https://git.kernel.org/stable/c/9ff718df547372d70ca20ad8e66a3fb1300936b2"},{"url":"https://git.kernel.org/stable/c/ec6444a00c49e6c2b5e9a507272a28126677f9ee"}],"title":"drm/bridge: tc358767: clamp the reported AUX read size to the request","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93067","datePublished":"2026-09-17T16:10:52.288Z","dateReserved":"2026-09-17T15:57:05.660Z","dateUpdated":"2026-09-17T16:10:52.288Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:18:00","lastModifiedDate":"2026-09-17 17:18:00","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93067","Ordinal":"1","Title":"drm/bridge: tc358767: clamp the reported AUX read size to the re","CVE":"CVE-2026-93067","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93067","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/bridge: tc358767: clamp the reported AUX read size to the request\n\ntc_aux_transfer() clamps an AUX read to the payload limit:\n\n\tsize_t size = min_t(size_t, DP_AUX_MAX_PAYLOAD_BYTES - 1, msg->size);\n\nAfter the transfer it replaces size with the byte count the controller\nreports in AUX_BYTES:\n\n\tif (size)\n\t\tsize = FIELD_GET(AUX_BYTES, auxstatus);\n\nAUX_BYTES is GENMASK(15, 8), so it can be up to 255. Nothing clamps it\nback to the request. tc_aux_read_data() reads that many bytes into the\n16-byte auxrdata stack buffer, then copies them into the caller buffer. A\nreported count of 255 makes the read run to 256 bytes and overruns both.\n\nThe controller should never report more than it was asked to transfer, so\nthis is defense in depth rather than a live hole. The reported count is\nonly lightly trusted, and the check is cheap. Clamp it back to the request,\nthe same way ti-sn65dsi86 does in commit aca58eac52b8 (\"drm/bridge:\nti-sn65dsi86: Never store more than msg->size bytes in AUX xfer\").","Type":"Description","Title":"drm/bridge: tc358767: clamp the reported AUX read size to the re"}]}}}