CVE-2026-68234 (GCVE-0-2026-68234)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:00 – Updated: 2026-08-19 16:32
VLAI
Title
drm/amdgpu: fix bo->pin leaking in amdgpu_bo_create_reserved
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix bo->pin leaking in amdgpu_bo_create_reserved amdgpu_bo_create_reserved() only allocates a new BO when *bo_ptr (struct amdgpu_bo **bo_ptr as input parameter) is NULL, it simply skips creation when *bo_ptr is non-NULL. But it unconditionally reserves, pins, gart allocates and maps the BO afterwards. When the same non-NULL BO pointer is passed in again, for example firmware buffers that live in adev and are re-loaded on every resume / cp_resume / start under AMDGPU_FW_LOAD_DIRECT, amdgpu_bo_pin() just increases pin_count unconditionally, however the matching teardown only unpins once, so pin_count never drops to zero, so TTM is not able to move, swap or evict a BO, causing BO leaks. This commit fixes this issue by only pinning the bo once at creation, and repeated calls no longer take additional pin references. (cherry picked from commit 3ddc0ae76202c447b6aec61e907b852bc94671cf)
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 53766e5adac75872e9d413cdbfd0e47ae40701f9 , < 7aea619d9f186dcf0f1289879e9edb69d2b56639 (git)
Affected: 53766e5adac75872e9d413cdbfd0e47ae40701f9 , < b572d0814c1366701ca704286589fab025802566 (git)
Affected: 53766e5adac75872e9d413cdbfd0e47ae40701f9 , < e06e0885725a16304b7723aeb478a78cca9dc96a (git)
Affected: 53766e5adac75872e9d413cdbfd0e47ae40701f9 , < 51eeef1949c11d3dcb5f422a5d9b3f09ebe8a1bc (git)
Affected: 53766e5adac75872e9d413cdbfd0e47ae40701f9 , < 2f390b4c83011452753fd84972f657d2b00a952b (git)
Affected: 53766e5adac75872e9d413cdbfd0e47ae40701f9 , < ba7b6444097a73ccd3d3ac9e2be4ebb73d226460 (git)
Affected: 53766e5adac75872e9d413cdbfd0e47ae40701f9 , < 9743f60013273987abf415dc47474683d22aaee9 (git)
Affected: 53766e5adac75872e9d413cdbfd0e47ae40701f9 , < a2f895f3c852063258d62e9f74b081de07ca95df (git)
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Linux Linux Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: fix bo-\u003epin leaking in amdgpu_bo_create_reserved\n\namdgpu_bo_create_reserved() only allocates a new BO when\n*bo_ptr (struct amdgpu_bo **bo_ptr as input parameter) is\nNULL, it simply skips creation when *bo_ptr is non-NULL.\nBut it unconditionally reserves, pins, gart allocates\nand maps the BO afterwards.\n\nWhen the same non-NULL BO pointer is passed in again,\nfor example firmware buffers that live in adev and are\nre-loaded on every resume / cp_resume / start\nunder AMDGPU_FW_LOAD_DIRECT, amdgpu_bo_pin() just increases\npin_count unconditionally, however the matching teardown only unpins\nonce, so pin_count never drops to zero, so TTM is not able\nto move, swap or evict a BO, causing BO leaks.\n\nThis commit fixes this issue by only pinning the bo\nonce at creation, and repeated calls no longer\ntake additional pin references.\n\n(cherry picked from commit 3ddc0ae76202c447b6aec61e907b852bc94671cf)"
        }
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      "providerMetadata": {
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/7aea619d9f186dcf0f1289879e9edb69d2b56639"
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          "url": "https://git.kernel.org/stable/c/a2f895f3c852063258d62e9f74b081de07ca95df"
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    "datePublished": "2026-08-10T12:00:59.074Z",
    "dateReserved": "2026-07-30T09:28:09.376Z",
    "dateUpdated": "2026-08-19T16:32:06.457Z",
    "state": "PUBLISHED"
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pin_count never drops to zero, so TTM is not able\\nto move, swap or evict a BO, causing BO leaks.\\n\\nThis commit fixes this issue by only pinning the bo\\nonce at creation, and repeated calls no longer\\ntake additional pin references.\\n\\n(cherry picked from commit 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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-11T12:31:46+00:00",
      "cve": "CVE-2026-68234",
      "id": "CVE-2026-68234",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amdgpu: fix bo-\u003epin leaking in amdgpu_bo_create_reserved",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68234.json",
      "version": "3"
    }
  }
}



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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.