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CVE-2026-64546

drm/edid: fix OOB read in drm_parse_tiled_block()

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

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)

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • Linux Linux

    From 40d9b043a89e2301e1f97ade055a73ecc28e9afe · fixed in c4ab04ca1bbf87eefa9fec5c80e1880450d2e7c0; From 40d9b043a89e2301e1f97ade055a73ecc28e9afe · fixed in 9acd5c1ddc17ca4c5ffa0c373e3fdf480506e061; From 40d9b043a89e2301e1f97ade055a73ecc28e9afe · fixed in 157727131ce8a52d8d9bc676c372ef82db6436c4; From 40d9b043a89e2301e1f97ade055a73ecc28e9afe · fixed in bfa05d89dc3ca3fb1a9099ef5185549a5ec8490d; From 40d9b043a89e2301e1f97ade055a73ecc28e9afe · fixed in 4f5484d25f85ad6c989bad5f6a43450cecfcfd28; From 40d9b043a89e2301e1f97ade055a73ecc28e9afe · fixed in 9cc0f8e63e8c34cf43def35cbd305ba711181a1f; From 40d9b043a89e2301e1f97ade055a73ecc28e9afe · fixed in 4137e1ecec9c8cb6c4fcee28ffabbbc7409eb7fb; From 40d9b043a89e2301e1f97ade055a73ecc28e9afe · fixed in faaa1e1155833e7d4ce7e3cfaf64c0d636b190db

  • Linux Linux

    3.19

  • KernelLinux

    From 3.19.0 · fixed in 5.10.261; From 5.11.0 · fixed in 5.15.212; From 5.16.0 · fixed in 6.1.178; From 6.2.0 · fixed in 6.6.145; From 6.7.0 · fixed in 6.12.97; From 6.13.0 · fixed in 6.18.40; From 6.19.0 · fixed in 7.1.5

References 8

git.kernel.org