CVE-2026-74448 (GCVE-0-2026-74448)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:26 – Updated: 2026-08-18 06:56
VLAI
Title
drm/amdkfd: fix QID bit leak in pqm_create_queue()
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix QID bit leak in pqm_create_queue() When MES is enabled and amdgpu_amdkfd_alloc_kernel_mem() fails during the first queue creation for a process, pqm_create_queue() returns early via 'return retval' without going through the err_create_queue cleanup label. This means clear_bit(*qid, pqm->queue_slot_bitmap) is never called, leaving the reserved QID bit permanently set in queue_slot_bitmap. Over time this leaks QID slots, potentially exhausting all available queue slots. Fix this by replacing 'return retval' with 'goto err_allocate_pqn' so that clear_bit() is always called on the error path without touching the uninitialized pqn pointer. AILIKFD-813 (cherry picked from commit a107f74c38edbb80d6ab64dcaeeb292c14e9779f)
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0f88894aa628680747ae27760e5f627f901a435f , < 8924e2594a15bdbd07f8696770864366d787ab70 (git)
Affected: c0ef1c8ef70bfa3487ea84f794d7a1f0fea0735d , < 2ff5bb3645c72b3690e70c513a62a86600c4632f (git)
Affected: fddc45026311c05a5355fd34b9dc0a1d7eaef4a2 , < 5f0f2ddeac738e2ca9d12cb76a1ff2904e85ecc3 (git)
Affected: fddc45026311c05a5355fd34b9dc0a1d7eaef4a2 , < 7c35bf94150d872e670a6632aa819d320279effb (git)
Affected: fddc45026311c05a5355fd34b9dc0a1d7eaef4a2 , < 38b73293f38658a4685ffcea666462024f858ad9 (git)
Affected: 9d61e2b81f5fc90c87975879809346e7c90ea5f9 (git)
Affected: d86ba913bbfd1afafacbfb750001ffc6bfe29da0 (git)
Affected: 6.6.87 , < 6.6.151 (semver)
Affected: 6.12.23 , < 6.12.103 (semver)
Affected: 6.13.11 , < 6.14 (semver)
Affected: 6.14.2 , < 6.15 (semver)
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Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.6.151 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: fix QID bit leak in pqm_create_queue()\n\nWhen MES is enabled and amdgpu_amdkfd_alloc_kernel_mem() fails during\nthe first queue creation for a process, pqm_create_queue() returns\nearly via \u0027return retval\u0027 without going through the err_create_queue\ncleanup label.\n\nThis means clear_bit(*qid, pqm-\u003equeue_slot_bitmap) is never called,\nleaving the reserved QID bit permanently set in queue_slot_bitmap.\nOver time this leaks QID slots, potentially exhausting all available\nqueue slots.\n\nFix this by replacing \u0027return retval\u0027 with \u0027goto err_allocate_pqn\u0027\nso that clear_bit() is always called on the error path without\ntouching the uninitialized pqn pointer.\n\nAILIKFD-813\n\n(cherry picked from commit a107f74c38edbb80d6ab64dcaeeb292c14e9779f)"
        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-18T06:56:34.583Z",
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          "url": "https://git.kernel.org/stable/c/5f0f2ddeac738e2ca9d12cb76a1ff2904e85ecc3"
        },
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          "url": "https://git.kernel.org/stable/c/7c35bf94150d872e670a6632aa819d320279effb"
        },
        {
          "url": "https://git.kernel.org/stable/c/38b73293f38658a4685ffcea666462024f858ad9"
        }
      ],
      "title": "drm/amdkfd: fix QID bit leak in pqm_create_queue()",
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    "cveId": "CVE-2026-74448",
    "datePublished": "2026-08-15T12:26:53.915Z",
    "dateReserved": "2026-08-15T05:44:03.899Z",
    "dateUpdated": "2026-08-18T06:56:34.583Z",
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-19T05:25:32+00:00",
      "cve": "CVE-2026-74448",
      "id": "CVE-2026-74448",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amdkfd: fix QID bit leak in pqm_create_queue()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74448.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-18T16:54:20Z",
      "cve": "CVE-2026-74448",
      "id": "CVE-2026-74448",
      "initial_release_date": "2026-08-15T23:52:52Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-74448",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-74448.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.
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