Vulnerability-Lookup

CVE-2026-64546 (GCVE-0-2026-64546)

Vulnerability from cvelistv5 – Published: 2026-07-27 20:10 – Updated: 2026-07-27 20:10

Title

drm/edid: fix OOB read in drm_parse_tiled_block()

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)

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/c4ab04ca1bbf87eef…
https://git.kernel.org/stable/c/9acd5c1ddc17ca4c5…
https://git.kernel.org/stable/c/157727131ce8a52d8…
https://git.kernel.org/stable/c/bfa05d89dc3ca3fb1…
https://git.kernel.org/stable/c/4f5484d25f85ad6c9…
https://git.kernel.org/stable/c/9cc0f8e63e8c34cf4…
https://git.kernel.org/stable/c/4137e1ecec9c8cb6c…
https://git.kernel.org/stable/c/faaa1e1155833e7d4…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 40d9b043a89e2301e1f97ade055a73ecc28e9afe , < c4ab04ca1bbf87eefa9fec5c80e1880450d2e7c0 (git) Affected: 40d9b043a89e2301e1f97ade055a73ecc28e9afe , < 9acd5c1ddc17ca4c5ffa0c373e3fdf480506e061 (git) Affected: 40d9b043a89e2301e1f97ade055a73ecc28e9afe , < 157727131ce8a52d8d9bc676c372ef82db6436c4 (git) Affected: 40d9b043a89e2301e1f97ade055a73ecc28e9afe , < bfa05d89dc3ca3fb1a9099ef5185549a5ec8490d (git) Affected: 40d9b043a89e2301e1f97ade055a73ecc28e9afe , < 4f5484d25f85ad6c989bad5f6a43450cecfcfd28 (git) Affected: 40d9b043a89e2301e1f97ade055a73ecc28e9afe , < 9cc0f8e63e8c34cf43def35cbd305ba711181a1f (git) Affected: 40d9b043a89e2301e1f97ade055a73ecc28e9afe , < 4137e1ecec9c8cb6c4fcee28ffabbbc7409eb7fb (git) Affected: 40d9b043a89e2301e1f97ade055a73ecc28e9afe , < faaa1e1155833e7d4ce7e3cfaf64c0d636b190db (git)
Linux	Linux	Affected: 3.19 Unaffected: 0 , < 3.19 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/edid: fix OOB read in drm_parse_tiled_block()\n\ndrm_parse_tiled_block() casts the DisplayID block to a\nstruct displayid_tiled_block and reads the full fixed layout up to\ntile-\u003etopology_id[7] without checking block-\u003enum_bytes. The DisplayID\niterator only validates the declared payload length, so a crafted EDID\ncan advertise a tiled-display block (tag DATA_BLOCK_TILED_DISPLAY, or\nDATA_BLOCK_2_TILED_DISPLAY_TOPOLOGY for v2.0) with a small num_bytes at\nthe end of a DisplayID extension. The read then runs past the end of the\nexact-sized kmemdup()\u0027d EDID allocation, a heap out-of-bounds read.\n\nReject blocks shorter than the spec\u0027s 22-byte tiled payload before\nreading the fixed struct, as drm_parse_vesa_mso_data() already does.\n\n  BUG: KASAN: slab-out-of-bounds in drm_edid_connector_update\n  Read of size 2 at addr ffff888010077700 by task exploit/147\n   dump_stack_lvl (lib/dump_stack.c:94 ...)\n   print_report (mm/kasan/report.c:378 ...)\n   kasan_report (mm/kasan/report.c:595)\n   drm_edid_connector_update (drivers/gpu/drm/drm_edid.c:7581)\n   bochs_connector_helper_get_modes (drivers/gpu/drm/tiny/bochs.c:574)\n   drm_helper_probe_single_connector_modes (drivers/gpu/drm/drm_probe_helper.c:426)\n   status_store (drivers/gpu/drm/drm_sysfs.c:219)\n   ...\n   vfs_write (fs/read_write.c:595 fs/read_write.c:688)\n   ksys_write (fs/read_write.c:740)"
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The read then runs past the end of the\\nexact-sized kmemdup()\u0027d EDID allocation, a heap out-of-bounds read.\\n\\nReject blocks shorter than the spec\u0027s 22-byte tiled payload before\\nreading the fixed struct, as drm_parse_vesa_mso_data() already does.\\n\\n  BUG: KASAN: slab-out-of-bounds in drm_edid_connector_update\\n  Read of size 2 at addr ffff888010077700 by task exploit/147\\n   dump_stack_lvl (lib/dump_stack.c:94 ...)\\n   print_report (mm/kasan/report.c:378 ...)\\n   kasan_report (mm/kasan/report.c:595)\\n   drm_edid_connector_update (drivers/gpu/drm/drm_edid.c:7581)\\n   bochs_connector_helper_get_modes (drivers/gpu/drm/tiny/bochs.c:574)\\n   drm_helper_probe_single_connector_modes (drivers/gpu/drm/drm_probe_helper.c:426)\\n   status_store (drivers/gpu/drm/drm_sysfs.c:219)\\n   ...\\n   vfs_write (fs/read_write.c:595 fs/read_write.c:688)\\n   ksys_write (fs/read_write.c:740)\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/gpu/drm/drm_edid.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"40d9b043a89e2301e1f97ade055a73ecc28e9afe\",\"lessThan\":\"c4ab04ca1bbf87eefa9fec5c80e1880450d2e7c0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"40d9b043a89e2301e1f97ade055a73ecc28e9afe\",\"lessThan\":\"9acd5c1ddc17ca4c5ffa0c373e3fdf480506e061\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"40d9b043a89e2301e1f97ade055a73ecc28e9afe\",\"lessThan\":\"157727131ce8a52d8d9bc676c372ef82db6436c4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"40d9b043a89e2301e1f97ade055a73ecc28e9afe\",\"lessThan\":\"bfa05d89dc3ca3fb1a9099ef5185549a5ec8490d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"40d9b043a89e2301e1f97ade055a73ecc28e9afe\",\"lessThan\":\"4f5484d25f85ad6c989bad5f6a43450cecfcfd28\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"40d9b043a89e2301e1f97ade055a73ecc28e9afe\",\"lessThan\":\"9cc0f8e63e8c34cf43def35cbd305ba711181a1f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"40d9b043a89e2301e1f97ade055a73ecc28e9afe\",\"lessThan\":\"4137e1ecec9c8cb6c4fcee28ffabbbc7409eb7fb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"40d9b043a89e2301e1f97ade055a73ecc28e9afe\",\"lessThan\":\"faaa1e1155833e7d4ce7e3cfaf64c0d636b190db\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/gpu/drm/drm_edid.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.19\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.19\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/157727131ce8a52d8d9bc676c372ef82db6436c4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4137e1ecec9c8cb6c4fcee28ffabbbc7409eb7fb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4f5484d25f85ad6c989bad5f6a43450cecfcfd28\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9acd5c1ddc17ca4c5ffa0c373e3fdf480506e061\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9cc0f8e63e8c34cf43def35cbd305ba711181a1f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bfa05d89dc3ca3fb1a9099ef5185549a5ec8490d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c4ab04ca1bbf87eefa9fec5c80e1880450d2e7c0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/faaa1e1155833e7d4ce7e3cfaf64c0d636b190db\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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}

GHSA-7H2W-78JH-69GR

Vulnerability from github – Published: 2026-07-27 21:31 – Updated: 2026-07-27 21:31

Details

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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{
  "affected": [],
  "aliases": [
    "CVE-2026-64546"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-27T21:17:07Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/edid: fix OOB read in drm_parse_tiled_block()\n\ndrm_parse_tiled_block() casts the DisplayID block to a\nstruct displayid_tiled_block and reads the full fixed layout up to\ntile-\u003etopology_id[7] without checking block-\u003enum_bytes. The DisplayID\niterator only validates the declared payload length, so a crafted EDID\ncan advertise a tiled-display block (tag DATA_BLOCK_TILED_DISPLAY, or\nDATA_BLOCK_2_TILED_DISPLAY_TOPOLOGY for v2.0) with a small num_bytes at\nthe end of a DisplayID extension. The read then runs past the end of the\nexact-sized kmemdup()\u0027d EDID allocation, a heap out-of-bounds read.\n\nReject blocks shorter than the spec\u0027s 22-byte tiled payload before\nreading the fixed struct, as drm_parse_vesa_mso_data() already does.\n\n  BUG: KASAN: slab-out-of-bounds in drm_edid_connector_update\n  Read of size 2 at addr ffff888010077700 by task exploit/147\n   dump_stack_lvl (lib/dump_stack.c:94 ...)\n   print_report (mm/kasan/report.c:378 ...)\n   kasan_report (mm/kasan/report.c:595)\n   drm_edid_connector_update (drivers/gpu/drm/drm_edid.c:7581)\n   bochs_connector_helper_get_modes (drivers/gpu/drm/tiny/bochs.c:574)\n   drm_helper_probe_single_connector_modes (drivers/gpu/drm/drm_probe_helper.c:426)\n   status_store (drivers/gpu/drm/drm_sysfs.c:219)\n   ...\n   vfs_write (fs/read_write.c:595 fs/read_write.c:688)\n   ksys_write (fs/read_write.c:740)",
  "id": "GHSA-7h2w-78jh-69gr",
  "modified": "2026-07-27T21:31:26Z",
  "published": "2026-07-27T21:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64546"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/157727131ce8a52d8d9bc676c372ef82db6436c4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4137e1ecec9c8cb6c4fcee28ffabbbc7409eb7fb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f5484d25f85ad6c989bad5f6a43450cecfcfd28"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9acd5c1ddc17ca4c5ffa0c373e3fdf480506e061"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9cc0f8e63e8c34cf43def35cbd305ba711181a1f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bfa05d89dc3ca3fb1a9099ef5185549a5ec8490d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4ab04ca1bbf87eefa9fec5c80e1880450d2e7c0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/faaa1e1155833e7d4ce7e3cfaf64c0d636b190db"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-64546 (GCVE-0-2026-64546)

GHSA-7H2W-78JH-69GR

Tags

Sightings

Nomenclature