drm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval()

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Summary

CVECVE-2026-53330
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-01 14:16:40 UTC
Updated2026-07-01 14:16:40 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix out-of-bounds read in dp_get_eq_aux_rd_interval() [Why & How] The aux_rd_interval array in struct dc_lttpr_caps is declared with MAX_REPEATER_CNT - 1 (7) elements, indexed 0..6. However, the offset parameter passed to dp_get_eq_aux_rd_interval() can be as large as MAX_REPEATER_CNT (8) when a sink reports 8 LTTPR repeaters via DPCD. This leads to an out-of-bounds read of aux_rd_interval[7] when offset is 8. Fix this by growing aux_rd_interval to MAX_REPEATER_CNT elements to accommodate the full range of valid repeater counts defined by the DP spec. (cherry picked from commit a55a458a8df37a65ffda5cf721d554a8f74f6b04)

Risk And Classification

EPSS: 0.001660000 probability, percentile 0.061400000 (date 2026-07-04)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 454d3b3d499c18373f8960d31aea48338a3ca9e0 git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 dc1490927d79fe9621e29f4a4f5d7b5ccb6aea3e git Not specified
CNA Linux Linux affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 e8b4d37eba05141ee01794fc6b7f2da808cee83b git Not specified
CNA Linux Linux affected 6.18.36 semver Not specified
CNA Linux Linux affected 7.0.13 semver Not specified
CNA Linux Linux unaffected 6.18.36 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.13 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/e8b4d37eba05141ee01794fc6b7f2da808cee83b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/454d3b3d499c18373f8960d31aea48338a3ca9e0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/dc1490927d79fe9621e29f4a4f5d7b5ccb6aea3e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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