CVE-2026-23466 (GCVE-0-2026-23466)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-04-27 14:02
VLAI?
Title
drm/xe: Open-code GGTT MMIO access protection
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/xe: Open-code GGTT MMIO access protection GGTT MMIO access is currently protected by hotplug (drm_dev_enter), which works correctly when the driver loads successfully and is later unbound or unloaded. However, if driver load fails, this protection is insufficient because drm_dev_unplug() is never called. Additionally, devm release functions cannot guarantee that all BOs with GGTT mappings are destroyed before the GGTT MMIO region is removed, as some BOs may be freed asynchronously by worker threads. To address this, introduce an open-coded flag, protected by the GGTT lock, that guards GGTT MMIO access. The flag is cleared during the dev_fini_ggtt devm release function to ensure MMIO access is disabled once teardown begins. (cherry picked from commit 4f3a998a173b4325c2efd90bdadc6ccd3ad9a431)
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 919bb54e989c1edef87e9797be125c94c450fc65 , < e2b424aadecb640f9e037b2891191cf8fd4c64cf (git)
Affected: 919bb54e989c1edef87e9797be125c94c450fc65 , < 1e9e2640d870d4837bcfdc220cb2c99ae5ee119f (git)
Affected: 919bb54e989c1edef87e9797be125c94c450fc65 , < 76326dc06d8793c2c81c31cc0115dbc348de2f88 (git)
Affected: 919bb54e989c1edef87e9797be125c94c450fc65 , < 01f2557aa684e514005541e71a3d01f4cd45c170 (git)
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    Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
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            "drivers/gpu/drm/xe/xe_ggtt.c",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Open-code GGTT MMIO access protection\n\nGGTT MMIO access is currently protected by hotplug (drm_dev_enter),\nwhich works correctly when the driver loads successfully and is later\nunbound or unloaded. However, if driver load fails, this protection is\ninsufficient because drm_dev_unplug() is never called.\n\nAdditionally, devm release functions cannot guarantee that all BOs with\nGGTT mappings are destroyed before the GGTT MMIO region is removed, as\nsome BOs may be freed asynchronously by worker threads.\n\nTo address this, introduce an open-coded flag, protected by the GGTT\nlock, that guards GGTT MMIO access. The flag is cleared during the\ndev_fini_ggtt devm release function to ensure MMIO access is disabled\nonce teardown begins.\n\n(cherry picked from commit 4f3a998a173b4325c2efd90bdadc6ccd3ad9a431)"
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      "title": "drm/xe: Open-code GGTT MMIO access protection",
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    "datePublished": "2026-04-03T15:15:45.754Z",
    "dateReserved": "2026-01-13T15:37:46.021Z",
    "dateUpdated": "2026-04-27T14:02:40.866Z",
    "state": "PUBLISHED"
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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.