{"id":"CVE-2023-53784","state":"PUBLISHED","title":"drm: bridge: dw_hdmi: fix connector access for scdc","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: bridge: dw_hdmi: fix connector access for scdc\n\nCommit 5d844091f237 (\"drm/scdc-helper: Pimp SCDC debugs\") changed the scdc\ninterface to pick up an i2c adapter from a connector instead. However, in\nthe case of dw-hdmi, the wrong connector was being used to pass i2c adapter\ninformation, since dw-hdmi's embedded connector structure is only populated\nwhen the bridge attachment callback explicitly asks for it.\n\ndrm-meson is handling connector creation, so this won't happen, leading to\na NULL pointer dereference.\n\nFix it by having scdc functions access dw-hdmi's current connector pointer\ninstead, which is assigned during the bridge enablement stage.\n\n[narmstrong: moved Fixes tag before first S-o-b and added Reported-by tag]","publishedAt":"2025-12-09T00:00:39.591Z","updatedAt":"2026-05-11T19:51:27.807Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5d844091f2370f01752c3129b147861b9dcd3d98","status":"affected","lessThan":"552f79aa9e801ed4f74d6b3221af78042ba4f235","versionType":"git"},{"version":"5d844091f2370f01752c3129b147861b9dcd3d98","status":"affected","lessThan":"98703e4e061fb8715c7613cd227e32cdfd136b23","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/bridge/synopsys/dw-hdmi.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.4.5","status":"unaffected","lessThanOrEqual":"6.4.*","versionType":"semver"},{"version":"6.5","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/bridge/synopsys/dw-hdmi.c"]}],"references":["https://git.kernel.org/stable/c/552f79aa9e801ed4f74d6b3221af78042ba4f235","https://git.kernel.org/stable/c/98703e4e061fb8715c7613cd227e32cdfd136b23"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53784.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53784","state":"PUBLISHED","datePublished":"2025-12-09T00:00:39.591Z","dateUpdated":"2026-05-11T19:51:27.807Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-12-08T23:58:35.272Z"},"containers":{"cna":{"title":"drm: bridge: dw_hdmi: fix connector access for scdc","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: bridge: dw_hdmi: fix connector access for scdc\n\nCommit 5d844091f237 (\"drm/scdc-helper: Pimp SCDC debugs\") changed the scdc\ninterface to pick up an i2c adapter from a connector instead. However, in\nthe case of dw-hdmi, the wrong connector was being used to pass i2c adapter\ninformation, since dw-hdmi's embedded connector structure is only populated\nwhen the bridge attachment callback explicitly asks for it.\n\ndrm-meson is handling connector creation, so this won't happen, leading to\na NULL pointer dereference.\n\nFix it by having scdc functions access dw-hdmi's current connector pointer\ninstead, which is assigned during the bridge enablement stage.\n\n[narmstrong: moved Fixes tag before first S-o-b and added Reported-by tag]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5d844091f2370f01752c3129b147861b9dcd3d98","status":"affected","lessThan":"552f79aa9e801ed4f74d6b3221af78042ba4f235","versionType":"git"},{"version":"5d844091f2370f01752c3129b147861b9dcd3d98","status":"affected","lessThan":"98703e4e061fb8715c7613cd227e32cdfd136b23","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/bridge/synopsys/dw-hdmi.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.4","versionType":"semver"},{"version":"6.4.5","status":"unaffected","lessThanOrEqual":"6.4.*","versionType":"semver"},{"version":"6.5","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/bridge/synopsys/dw-hdmi.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/552f79aa9e801ed4f74d6b3221af78042ba4f235"},{"url":"https://git.kernel.org/stable/c/98703e4e061fb8715c7613cd227e32cdfd136b23"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:51:27.807Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.4.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4","versionEndExcluding":"6.5"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}