CVE-2026-98178 (GCVE-0-2026-98178)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:44 – Updated: 2026-10-06 08:44
VLAI
Title
drm/amdgpu: Skip KFD mapping clear before initialization
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Skip KFD mapping clear before initialization amdgpu_amdkfd_clear_kfd_mapping() assumes that a non-NULL kfd_dev has a fully populated node array. This is not true when KFD device initialization fails after probe. For example, kgd2kfd_device_init() sets num_nodes before checking PCIe atomics support. On Polaris systems without the required atomics, it returns before allocating nodes[0], but the kfd_dev remains attached to the amdgpu device. A later GPU reset then dereferences nodes[0]->id. Require the authoritative KFD initialization flag before walking the node array, matching the existing KFD reset and teardown paths. (cherry picked from commit 4ac1835823c47903fbb278bbf474773c46f59edc)
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 54/100 over 6633 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 70cadefcc6160c575b04f763ada34c20e868d577 , < 157d3f1db7e7e6f320daa221fae84a4c13555b6f (git)
Affected: 70cadefcc6160c575b04f763ada34c20e868d577 , < 7f9caa70aef0950e06d395ca0035831214d88187 (git)
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Linux Linux Affected: 7.2
Unaffected: 0 , < 7.2 (semver)
Unaffected: 7.2.8 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: Skip KFD mapping clear before initialization\n\namdgpu_amdkfd_clear_kfd_mapping() assumes that a non-NULL kfd_dev\nhas a fully populated node array. This is not true when KFD device\ninitialization fails after probe.\n\nFor example, kgd2kfd_device_init() sets num_nodes before checking\nPCIe atomics support. On Polaris systems without the required atomics,\nit returns before allocating nodes[0], but the kfd_dev remains attached\nto the amdgpu device. A later GPU reset then dereferences nodes[0]-\u003eid.\n\nRequire the authoritative KFD initialization flag before walking the\nnode array, matching the existing KFD reset and teardown paths.\n\n(cherry picked from commit 4ac1835823c47903fbb278bbf474773c46f59edc)"
        }
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    "datePublished": "2026-10-06T08:44:21.602Z",
    "dateReserved": "2026-09-25T10:25:14.322Z",
    "dateUpdated": "2026-10-06T08:44:21.602Z",
    "state": "PUBLISHED"
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          {
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: Skip KFD mapping clear before initialization\n\namdgpu_amdkfd_clear_kfd_mapping() assumes that a non-NULL kfd_dev\nhas a fully populated node array. This is not true when KFD device\ninitialization fails after probe.\n\nFor example, kgd2kfd_device_init() sets num_nodes before checking\nPCIe atomics support. On Polaris systems without the required atomics,\nit returns before allocating nodes[0], but the kfd_dev remains attached\nto the amdgpu device. A later GPU reset then dereferences nodes[0]-\u003eid.\n\nRequire the authoritative KFD initialization flag before walking the\nnode array, matching the existing KFD reset and teardown paths.\n\n(cherry picked from commit 4ac1835823c47903fbb278bbf474773c46f59edc)"
          }
        ],
        "id": "CVE-2026-98178",
        "lastModified": "2026-10-06T09:17:59.930",
        "metrics": {},
        "published": "2026-10-06T09:17:59.930",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: drm/amdgpu: Skip KFD mapping clear before initialization",
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      "cve": "CVE-2026-98178",
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      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-98178.json",
      "version": "2"
    }
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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.

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • 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.



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