CVE-2026-68104 (GCVE-0-2026-68104)

Vulnerability from cvelistv5 – Published: 2026-08-10 11:58 – Updated: 2026-08-13 22:39
VLAI
Title
drm/amdgpu: invoke pm_genpd_remove() before freeing genpd
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: invoke pm_genpd_remove() before freeing genpd Call pm_genpd_remove() to unregister from global list prior to releasing acp_genpd memory, and clear the pointer after free. (cherry picked from commit cd8650d7a91ee8b768e202354672553faa5cc1f2)
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: 25030321ba2860c56651429a4f28d94a6483d952 , < bdfc7f1e0900ef1361b828c4f69b72701f8a0a86 (git)
Affected: 25030321ba2860c56651429a4f28d94a6483d952 , < 5c0a82283271759fff445ac27182072f200a888c (git)
Affected: 25030321ba2860c56651429a4f28d94a6483d952 , < 08fee493e0261f9e4120a5c8e7e42e8a723574e8 (git)
Affected: 25030321ba2860c56651429a4f28d94a6483d952 , < 930a5dc3df4aa5e10393134bd5313d616dbebaf6 (git)
Affected: 25030321ba2860c56651429a4f28d94a6483d952 , < 28c9b3c5dc35cc790d11e26ca3fc6e068be63998 (git)
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Linux Linux Affected: 4.6
Unaffected: 0 , < 4.6 (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-rc2 , ≤ * (original_commit_for_fix)
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{
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      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c"
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              "status": "unaffected",
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              "status": "unaffected",
              "version": "7.1.6",
              "versionType": "semver"
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: invoke pm_genpd_remove() before freeing genpd\n\nCall pm_genpd_remove() to unregister from global list prior to releasing\nacp_genpd memory, and clear the pointer after free.\n\n(cherry picked from commit cd8650d7a91ee8b768e202354672553faa5cc1f2)"
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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              "lang": "en",
              "value": "AV:L - The bug is in acp_hw_fini during amdgpu driver teardown (amdgpu_pci_remove/amdgpu_driver_unload_kms), reachable via local PCI unbind/module unload or a failed amdgpu init cleanup after opening a DRM render node; there is no network-facing entry point.\nAC:L - Once the AMDGPU ACP block has been initialized, calling acp_hw_fini deterministically frees acp_genpd without unregistering it from the global genpd list; no race or special memory layout is required to leave a dangling list entry.\nPR:L - Unprivileged users with access to /dev/dri/renderD* can autoload amdgpu and trigger the fini path if initialization fails after ACP setup; the same bug also fires on privileged driver unload/hot-unplug teardown of AMDGPU on ACP-capable APUs (Carrizo/Stoney).\nUI:N - Exploitation does not require any victim interaction such as clicking links or mounting filesystems; triggering driver teardown or a failed init cleanup is sufficient once the attacker can open the DRM device or unload the driver.\nS:U - The use-after-free corrupts kernel heap metadata/objects in the same kernel security domain during AMDGPU/ACP teardown; it does not by itself cross VM, container, or IOMMU boundaries to impact a separate authority.\nC:H - Freeing the generic_pm_domain while it remains linked on the global gpd_list is a kernel use-after-free; subsequent genpd list walks can read attacker-influenced freed memory, enabling information disclosure and kernel pointer leaks.\nI:H - The dangling genpd entry allows the power-domain core to perform reads/writes through a freed acp_pm_domain/generic_pm_domain object, providing a standard heap UAF primitive that can be developed into arbitrary kernel memory corruption or code execution.\nA:H - Dereferencing the freed genpd from the global list during later power-management operations can cause kernel oops/panic or hang, and the UAF can be leveraged for a reliable denial-of-service even when full exploitation is not attempted."
            }
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-13T22:39:38.154Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/28c9b3c5dc35cc790d11e26ca3fc6e068be63998"
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    "cveId": "CVE-2026-68104",
    "datePublished": "2026-08-10T11:58:20.614Z",
    "dateReserved": "2026-07-30T09:28:09.368Z",
    "dateUpdated": "2026-08-13T22:39:38.154Z",
    "state": "PUBLISHED"
  },
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      "date": "2026-08-14",
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-14T17:29:58+00:00",
      "cve": "CVE-2026-68104",
      "id": "CVE-2026-68104",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "275",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: drm/amdgpu: invoke pm_genpd_remove() before freeing genpd",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68104.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-08-13T01:28:26Z",
      "cve": "CVE-2026-68104",
      "id": "CVE-2026-68104",
      "initial_release_date": "2026-08-13T01:28:26Z",
      "product_status:known_affected": "205",
      "product_status:known_not_affected": "91",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68104",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68104.json",
      "version": "2"
    }
  }
}



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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

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.