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CVE-2022-48990 (GCVE-0-2022-48990)

Vulnerability from cvelistv5 – Published: 2024-10-21 20:06 – Updated: 2026-08-05 08:53
VLAI
Title
drm/amdgpu: fix use-after-free during gpu recovery
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix use-after-free during gpu recovery [Why] [ 754.862560] refcount_t: underflow; use-after-free. [ 754.862898] Call Trace: [ 754.862903] <TASK> [ 754.862913] amdgpu_job_free_cb+0xc2/0xe1 [amdgpu] [ 754.863543] drm_sched_main.cold+0x34/0x39 [amd_sched] [How] The fw_fence may be not init, check whether dma_fence_init is performed before job free
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-22 13:16 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f6a3f66063ca39e7ee5fcee59e889c5ec4de9dc0 , < d2a89cd942edd50c1e652004fd64019be78b0a96 (git)
Affected: f6a3f66063ca39e7ee5fcee59e889c5ec4de9dc0 , < 3cb93f390453cde4d6afda1587aaa00e75e09617 (git)
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Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.0.13 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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              "cvssV3_1": {
                "baseScore": 7.8,
                "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"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - Reachable only via local AMDGPU DRM paths on /dev/dri/renderD* (AMDGPU_CS submission and context/entity teardown into amdgpu_job_free_cb); there is no network or adjacent-protocol entry into the GPU scheduler job free path.\nAC:L - An attacker fully controls both sides\u2014queue jobs then destroy the context/process (drm_sched_entity_kill \u2192 free_job on never-run jobs), or hang the GPU to force recovery so skipped jobs hit free_cb without dma_fence_init\u2014so the uninitialized hw_fence put is deterministic with no attacker-uncontrollable race.\nPR:L - AMDGPU_CS/CTX are DRM_AUTH|DRM_RENDER_ALLOW; any unprivileged user with render-node access (render/video group, desktop sessions, Android GPU apps) can open /dev/dri/renderD* and submit/teardown work without CAP_SYS_ADMIN or real root.\nUI:N - The attacker opens the render node and issues AMDGPU_CS/context destroy (or triggers a hang) entirely from their own process; no separate victim action is required.\nS:U - Impact is confined to the host kernel\u2019s security authority (local job/fence lifetime corruption in amdgpu); there is no VM escape, IOMMU bypass, or other cross-boundary scope change.\nC:H - The kernel classifies this as use-after-free (refcount_t underflow on the embedded hw_fence in amdgpu_job_free_cb); per UAF guidance, reclaim/spray of the corrupted job/fence lifetime enables arbitrary kernel read primitives.\nI:H - The same UAF-class fence/job free-path corruption (putting an uninitialized or incorrectly lifetime-managed hw_fence) enables heap corruption suitable for arbitrary write and control-flow hijack, matching prior amdgpu UAF scoring.\nA:H - The demonstrated effect is a kernel WARNING/refcount underflow use-after-free in amdgpu_job_free_cb (and can panic under panic_on_warn), and the bad free path can oops or destabilize GPU recovery/teardown, which is High availability impact."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T08:53:19.510Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/d2a89cd942edd50c1e652004fd64019be78b0a96"
            },
            {
              "url": "https://git.kernel.org/stable/c/3cb93f390453cde4d6afda1587aaa00e75e09617"
            }
          ],
          "title": "drm/amdgpu: fix use-after-free during gpu recovery",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-48990",
        "datePublished": "2024-10-21T20:06:07.203Z",
        "dateReserved": "2024-08-22T01:27:53.635Z",
        "dateUpdated": "2026-08-05T08:53:19.510Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

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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.


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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.