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CVE-2026-53136 is an out-of-bounds heap write vulnerability in the Linux kernel AMD display driver. In the drm/amd/display subsystem, the VBIOS integrated information table parsers for versions v1_11 and v2_1 use the HdmiRegNum and Hdmi6GRegNum fields as loop bounds when copying HDMI retimer I2C register settings into fixed-size destination arrays. These fields are 8-bit values and were not validated before use. A malformed VBIOS can therefore specify counts larger than the destination arrays, causing writes past the end of the heap-allocated buffers during driver probe. The issue affects the code paths in get_integrated_info_v11() and get_integrated_info_v2_1(). The fix clamps each register count to the corresponding destination array size before the copy loops execute.
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9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A specific vulnerability affecting Red Hat Enterprise Linux 10.2 kernel-related packages; the content does not provide technical details beyond listing it in the advisory.
A specific vulnerability affecting Red Hat Enterprise Linux 9 kernel-related packages, referenced in RHSA-2026:57252.
Linux kernel drm/amd/display array-bounds issue involving VBIOS HDMI retimer register count.
A Linux kernel vulnerability in drm/amd/display involving improper validation of VBIOS HDMI retimer register count against array size.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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