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drm/edid: fix OOB read in drm_parse_tiled_block()

Type: advisorySource: Official CVE List1 source record

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)

Announced Source revision 1
Original source ↗

CVE-2026-64546

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-64546

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "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"
      }
    ],
    "programFiles": [
      "drivers/gpu/drm/drm_edid.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.19"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.19",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.261",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.212",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.178",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.97",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.40",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/gpu/drm/drm_edid.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-64546

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41077 · Revision 1
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Publisher date
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