CVE-2026-64546

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

drm/edid: fix OOB read in drm_parse_tiled_block()

drm_parse_tiled_block() casts the DisplayID block to a

struct displayid_tiled_block and reads the full fixed layout up to

tile->topology_id[7] without checking block->num_bytes. The DisplayID

iterator only validates the declared payload length, so a crafted EDID

can advertise a tiled-display block (tag DATA_BLOCK_TILED_DISPLAY, or

DATA_BLOCK_2_TILED_DISPLAY_TOPOLOGY for v2.0) with a small num_bytes at

the end of a DisplayID extension. The read then runs past the end of the

exact-sized kmemdup()'d EDID allocation, a heap out-of-bounds read.

Reject blocks shorter than the spec's 22-byte tiled payload before

reading the fixed struct, as drm_parse_vesa_mso_data() already does.

BUG: KASAN: slab-out-of-bounds in drm_edid_connector_update

Read of size 2 at addr ffff888010077700 by task exploit/147

dump_stack_lvl (lib/dump_stack.c:94 ...)

print_report (mm/kasan/re

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References