{"id":"CVE-2026-53330","state":"PUBLISHED","title":"drm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval()\n\n[Why & How]\nThe aux_rd_interval array in struct dc_lttpr_caps is declared with\nMAX_REPEATER_CNT - 1 (7) elements, indexed 0..6. However, the offset\nparameter passed to dp_get_eq_aux_rd_interval() can be as large as\nMAX_REPEATER_CNT (8) when a sink reports 8 LTTPR repeaters via DPCD.\nThis leads to an out-of-bounds read of aux_rd_interval[7] when offset\nis 8.\n\nFix this by growing aux_rd_interval to MAX_REPEATER_CNT elements to\naccommodate the full range of valid repeater counts defined by the DP\nspec.\n\n(cherry picked from commit a55a458a8df37a65ffda5cf721d554a8f74f6b04)","publishedAt":"2026-07-01T13:32:15.160Z","updatedAt":"2026-10-30T12:26:59.997Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8e5100a575433cc185a2e224280fbd873b6692dd","status":"affected","lessThan":"7b310c6d82d782282085c9728dfe69e07d185b6c","versionType":"git"},{"version":"8e5100a575433cc185a2e224280fbd873b6692dd","status":"affected","lessThan":"a632474c793b7f2a9bbd3d8e3d0dd7d256989300","versionType":"git"},{"version":"8e5100a575433cc185a2e224280fbd873b6692dd","status":"affected","lessThan":"7c5f2d16a8f4464bf2a719ceb2316b8a6b87a3c0","versionType":"git"},{"version":"8e5100a575433cc185a2e224280fbd873b6692dd","status":"affected","lessThan":"454d3b3d499c18373f8960d31aea48338a3ca9e0","versionType":"git"},{"version":"8e5100a575433cc185a2e224280fbd873b6692dd","status":"affected","lessThan":"dc1490927d79fe9621e29f4a4f5d7b5ccb6aea3e","versionType":"git"},{"version":"8e5100a575433cc185a2e224280fbd873b6692dd","status":"affected","lessThan":"e8b4d37eba05141ee01794fc6b7f2da808cee83b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/dc_dp_types.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.6","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.114","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/dc_dp_types.h"]}],"references":["https://git.kernel.org/stable/c/7b310c6d82d782282085c9728dfe69e07d185b6c","https://git.kernel.org/stable/c/a632474c793b7f2a9bbd3d8e3d0dd7d256989300","https://git.kernel.org/stable/c/7c5f2d16a8f4464bf2a719ceb2316b8a6b87a3c0","https://git.kernel.org/stable/c/454d3b3d499c18373f8960d31aea48338a3ca9e0","https://git.kernel.org/stable/c/dc1490927d79fe9621e29f4a4f5d7b5ccb6aea3e","https://git.kernel.org/stable/c/e8b4d37eba05141ee01794fc6b7f2da808cee83b"],"weaknesses":[],"ingestedAt":"2026-10-30T12:44:04.813Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53330.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53330","state":"PUBLISHED","datePublished":"2026-07-01T13:32:15.160Z","dateUpdated":"2026-10-30T12:26:59.997Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.398Z"},"containers":{"cna":{"title":"drm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval()\n\n[Why & How]\nThe aux_rd_interval array in struct dc_lttpr_caps is declared with\nMAX_REPEATER_CNT - 1 (7) elements, indexed 0..6. However, the offset\nparameter passed to dp_get_eq_aux_rd_interval() can be as large as\nMAX_REPEATER_CNT (8) when a sink reports 8 LTTPR repeaters via DPCD.\nThis leads to an out-of-bounds read of aux_rd_interval[7] when offset\nis 8.\n\nFix this by growing aux_rd_interval to MAX_REPEATER_CNT elements to\naccommodate the full range of valid repeater counts defined by the DP\nspec.\n\n(cherry picked from commit a55a458a8df37a65ffda5cf721d554a8f74f6b04)"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8e5100a575433cc185a2e224280fbd873b6692dd","status":"affected","lessThan":"7b310c6d82d782282085c9728dfe69e07d185b6c","versionType":"git"},{"version":"8e5100a575433cc185a2e224280fbd873b6692dd","status":"affected","lessThan":"a632474c793b7f2a9bbd3d8e3d0dd7d256989300","versionType":"git"},{"version":"8e5100a575433cc185a2e224280fbd873b6692dd","status":"affected","lessThan":"7c5f2d16a8f4464bf2a719ceb2316b8a6b87a3c0","versionType":"git"},{"version":"8e5100a575433cc185a2e224280fbd873b6692dd","status":"affected","lessThan":"454d3b3d499c18373f8960d31aea48338a3ca9e0","versionType":"git"},{"version":"8e5100a575433cc185a2e224280fbd873b6692dd","status":"affected","lessThan":"dc1490927d79fe9621e29f4a4f5d7b5ccb6aea3e","versionType":"git"},{"version":"8e5100a575433cc185a2e224280fbd873b6692dd","status":"affected","lessThan":"e8b4d37eba05141ee01794fc6b7f2da808cee83b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/amd/display/dc/dc_dp_types.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.6","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.114","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/dc_dp_types.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/7b310c6d82d782282085c9728dfe69e07d185b6c"},{"url":"https://git.kernel.org/stable/c/a632474c793b7f2a9bbd3d8e3d0dd7d256989300"},{"url":"https://git.kernel.org/stable/c/7c5f2d16a8f4464bf2a719ceb2316b8a6b87a3c0"},{"url":"https://git.kernel.org/stable/c/454d3b3d499c18373f8960d31aea48338a3ca9e0"},{"url":"https://git.kernel.org/stable/c/dc1490927d79fe9621e29f4a4f5d7b5ccb6aea3e"},{"url":"https://git.kernel.org/stable/c/e8b4d37eba05141ee01794fc6b7f2da808cee83b"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:26:59.997Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.18.36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"7.0.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}