{"id":"CVE-2026-53136","state":"PUBLISHED","title":"drm/amd/display: Clamp VBIOS HDMI retimer register count to array size","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Clamp VBIOS HDMI retimer register count to array size\n\n[Why & How]\nThe VBIOS integrated info tables (v1_11 and v2_1) contain HdmiRegNum and\nHdmi6GRegNum fields that are used as loop bounds when copying retimer I2C\nregister settings into fixed-size arrays (dp*_ext_hdmi_reg_settings[9]\nand dp*_ext_hdmi_6g_reg_settings[3]). These u8 fields are not validated\nbefore use, so a malformed VBIOS can specify values up to 255, causing an\nout-of-bounds heap write during driver probe.\n\nClamp each register count to the destination array size using min_t()\nbefore the copy loops, in both get_integrated_info_v11() and\nget_integrated_info_v2_1().\n\n(cherry picked from commit 5a7f0ef90195940c54b0f5bb85b87da55f038c69)","publishedAt":"2026-06-25T08:38:25.097Z","updatedAt":"2026-06-29T04:18:52.196Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a","status":"affected","lessThan":"029571d51140650783be4fb98fe7cb4754752086","versionType":"git"},{"version":"1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a","status":"affected","lessThan":"5f8b39452fb16f507c9e4d8b4a83ce27e893307c","versionType":"git"},{"version":"1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a","status":"affected","lessThan":"4d1c3c26c2ab1842e139e61983395d64bd2e518b","versionType":"git"},{"version":"1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a","status":"affected","lessThan":"d6be8e59af412623e3d874be3a048406c0edfe60","versionType":"git"},{"version":"1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a","status":"affected","lessThan":"3f32d52ec604c659725d865cf8cc6a17a33f9c6a","versionType":"git"},{"version":"1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a","status":"affected","lessThan":"8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117","versionType":"git"},{"version":"1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a","status":"affected","lessThan":"fb0707ce00eef4e2d60c3020e1c0432739703e4a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.15","versionType":"semver"},{"version":"5.15.210","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.94","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.36","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.13","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/display/dc/bios/bios_parser2.c"]}],"references":["https://git.kernel.org/stable/c/029571d51140650783be4fb98fe7cb4754752086","https://git.kernel.org/stable/c/5f8b39452fb16f507c9e4d8b4a83ce27e893307c","https://git.kernel.org/stable/c/4d1c3c26c2ab1842e139e61983395d64bd2e518b","https://git.kernel.org/stable/c/d6be8e59af412623e3d874be3a048406c0edfe60","https://git.kernel.org/stable/c/3f32d52ec604c659725d865cf8cc6a17a33f9c6a","https://git.kernel.org/stable/c/8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117","https://git.kernel.org/stable/c/fb0707ce00eef4e2d60c3020e1c0432739703e4a"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53136.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53136","state":"PUBLISHED","datePublished":"2026-06-25T08:38:25.097Z","dateUpdated":"2026-06-29T04:18:52.196Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.387Z"},"containers":{"cna":{"title":"drm/amd/display: Clamp VBIOS HDMI retimer register count to array size","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Clamp VBIOS HDMI retimer register count to array size\n\n[Why & How]\nThe VBIOS integrated info tables (v1_11 and v2_1) contain HdmiRegNum and\nHdmi6GRegNum fields that are used as loop bounds when copying retimer I2C\nregister settings into fixed-size arrays (dp*_ext_hdmi_reg_settings[9]\nand dp*_ext_hdmi_6g_reg_settings[3]). These u8 fields are not validated\nbefore use, so a malformed VBIOS can specify values up to 255, causing an\nout-of-bounds heap write during driver probe.\n\nClamp each register count to the destination array size using min_t()\nbefore the copy loops, in both get_integrated_info_v11() and\nget_integrated_info_v2_1().\n\n(cherry picked from commit 5a7f0ef90195940c54b0f5bb85b87da55f038c69)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a","status":"affected","lessThan":"029571d51140650783be4fb98fe7cb4754752086","versionType":"git"},{"version":"1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a","status":"affected","lessThan":"5f8b39452fb16f507c9e4d8b4a83ce27e893307c","versionType":"git"},{"version":"1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a","status":"affected","lessThan":"4d1c3c26c2ab1842e139e61983395d64bd2e518b","versionType":"git"},{"version":"1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a","status":"affected","lessThan":"d6be8e59af412623e3d874be3a048406c0edfe60","versionType":"git"},{"version":"1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a","status":"affected","lessThan":"3f32d52ec604c659725d865cf8cc6a17a33f9c6a","versionType":"git"},{"version":"1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a","status":"affected","lessThan":"8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117","versionType":"git"},{"version":"1e8635ea0ea370bf4f0f2b2f1b3eb61474dd962a","status":"affected","lessThan":"fb0707ce00eef4e2d60c3020e1c0432739703e4a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.15","versionType":"semver"},{"version":"5.15.210","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.94","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.36","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.13","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/display/dc/bios/bios_parser2.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/029571d51140650783be4fb98fe7cb4754752086"},{"url":"https://git.kernel.org/stable/c/5f8b39452fb16f507c9e4d8b4a83ce27e893307c"},{"url":"https://git.kernel.org/stable/c/4d1c3c26c2ab1842e139e61983395d64bd2e518b"},{"url":"https://git.kernel.org/stable/c/d6be8e59af412623e3d874be3a048406c0edfe60"},{"url":"https://git.kernel.org/stable/c/3f32d52ec604c659725d865cf8cc6a17a33f9c6a"},{"url":"https://git.kernel.org/stable/c/8aaa7e317fbd4beb9c6a9f77aa4cf52fae78b117"},{"url":"https://git.kernel.org/stable/c/fb0707ce00eef4e2d60c3020e1c0432739703e4a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-29T04:18:52.196Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"5.15.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.1.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.6.143"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.12.94"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"6.18.36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"7.0.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}