{"id":"CVE-2025-37870","state":"PUBLISHED","title":"drm/amd/display: prevent hang on link training fail","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: prevent hang on link training fail\n\n[Why]\nWhen link training fails, the phy clock will be disabled. However, in\nenable_streams, it is assumed that link training succeeded and the\nmux selects the phy clock, causing a hang when a register write is made.\n\n[How]\nWhen enable_stream is hit, check if link training failed. If it did, fall\nback to the ref clock to avoid a hang and keep the system in a recoverable\nstate.","publishedAt":"2025-05-09T06:43:59.074Z","updatedAt":"2026-10-21T12:36:33.834Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7462475e3a06fbb0b36243b391296f9f411e9041","status":"affected","lessThan":"52cdc47cf6519e2912a34d29b7eeb3f10ca85efa","versionType":"git"},{"version":"7462475e3a06fbb0b36243b391296f9f411e9041","status":"affected","lessThan":"0363c03672cd3191f037905bf981eb523a3b71b1","versionType":"git"},{"version":"7462475e3a06fbb0b36243b391296f9f411e9041","status":"affected","lessThan":"04bf4f2a497e9877c425c5124652e61fb8a1a0aa","versionType":"git"},{"version":"7462475e3a06fbb0b36243b391296f9f411e9041","status":"affected","lessThan":"8058061ed9d6bc259d1e678607b07d259342c08f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.3","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.25","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.14.4","status":"unaffected","lessThanOrEqual":"6.14.*","versionType":"semver"},{"version":"6.15","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/hwss/dcn20/dcn20_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c"]}],"references":["https://git.kernel.org/stable/c/52cdc47cf6519e2912a34d29b7eeb3f10ca85efa","https://git.kernel.org/stable/c/0363c03672cd3191f037905bf981eb523a3b71b1","https://git.kernel.org/stable/c/04bf4f2a497e9877c425c5124652e61fb8a1a0aa","https://git.kernel.org/stable/c/8058061ed9d6bc259d1e678607b07d259342c08f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:03.054Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/37xxx/CVE-2025-37870.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-37870","state":"PUBLISHED","datePublished":"2025-05-09T06:43:59.074Z","dateUpdated":"2026-10-21T12:36:33.834Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:23.959Z"},"containers":{"cna":{"title":"drm/amd/display: prevent hang on link training fail","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: prevent hang on link training fail\n\n[Why]\nWhen link training fails, the phy clock will be disabled. However, in\nenable_streams, it is assumed that link training succeeded and the\nmux selects the phy clock, causing a hang when a register write is made.\n\n[How]\nWhen enable_stream is hit, check if link training failed. If it did, fall\nback to the ref clock to avoid a hang and keep the system in a recoverable\nstate."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7462475e3a06fbb0b36243b391296f9f411e9041","status":"affected","lessThan":"52cdc47cf6519e2912a34d29b7eeb3f10ca85efa","versionType":"git"},{"version":"7462475e3a06fbb0b36243b391296f9f411e9041","status":"affected","lessThan":"0363c03672cd3191f037905bf981eb523a3b71b1","versionType":"git"},{"version":"7462475e3a06fbb0b36243b391296f9f411e9041","status":"affected","lessThan":"04bf4f2a497e9877c425c5124652e61fb8a1a0aa","versionType":"git"},{"version":"7462475e3a06fbb0b36243b391296f9f411e9041","status":"affected","lessThan":"8058061ed9d6bc259d1e678607b07d259342c08f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.3","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.25","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.14.4","status":"unaffected","lessThanOrEqual":"6.14.*","versionType":"semver"},{"version":"6.15","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/hwss/dcn20/dcn20_hwseq.c","drivers/gpu/drm/amd/display/dc/hwss/dcn401/dcn401_hwseq.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/52cdc47cf6519e2912a34d29b7eeb3f10ca85efa"},{"url":"https://git.kernel.org/stable/c/0363c03672cd3191f037905bf981eb523a3b71b1"},{"url":"https://git.kernel.org/stable/c/04bf4f2a497e9877c425c5124652e61fb8a1a0aa"},{"url":"https://git.kernel.org/stable/c/8058061ed9d6bc259d1e678607b07d259342c08f"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:36:33.834Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.12.25"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.14.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.15"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}