PT-2026-65221 · Linux · Linux
CVE-2026-64546
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Published
2026-07-27
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Updated
2026-07-27
None
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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/report.c:378 ...)
kasan report (mm/kasan/report.c:595)
drm edid connector update (drivers/gpu/drm/drm edid.c:7581)
bochs connector helper get modes (drivers/gpu/drm/tiny/bochs.c:574)
drm helper probe single connector modes (drivers/gpu/drm/drm probe helper.c:426)
status store (drivers/gpu/drm/drm sysfs.c:219)
...
vfs write (fs/read write.c:595 fs/read write.c:688)
ksys write (fs/read write.c:740)
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Related Identifiers
Affected Products
Linux