Vulnerability-Lookup

GHSA-4C3M-C328-J6MF

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-10 15:33

Details

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: check amdgpu_vm_bo_find() result in GET_MAPPING_INFO

The AMDGPU_GEM_OP_GET_MAPPING_INFO path of amdgpu_gem_op_ioctl() looks up the bo_va for the buffer object in the caller's VM via amdgpu_vm_bo_find(), but uses the returned pointer without checking it.

amdgpu_vm_bo_find() returns NULL when the BO has no bo_va in that VM, which is the normal case for a BO that has never been mapped. The result is fed straight into amdgpu_vm_bo_va_for_each_valid_mapping(), which expands to list_for_each_entry(mapping, &(bo_va)->valids, list) and dereferences bo_va, causing a NULL pointer dereference.

This is reachable by any process able to issue the ioctl (render group) simply by requesting mapping info for an unmapped BO.

Return -ENOENT when no bo_va is found, jumping to out_exec so the drm_exec context and GEM object reference are released.

(cherry picked from commit 528b19377affc1cc7362a70a254c1dda793595f9)

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{
  "affected": [],
  "aliases": [
    "CVE-2026-68275"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:16Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: check amdgpu_vm_bo_find() result in GET_MAPPING_INFO\n\nThe AMDGPU_GEM_OP_GET_MAPPING_INFO path of amdgpu_gem_op_ioctl() looks\nup the bo_va for the buffer object in the caller\u0027s VM via\namdgpu_vm_bo_find(), but uses the returned pointer without checking it.\n\namdgpu_vm_bo_find() returns NULL when the BO has no bo_va in that VM,\nwhich is the normal case for a BO that has never been mapped. The result\nis fed straight into amdgpu_vm_bo_va_for_each_valid_mapping(), which\nexpands to list_for_each_entry(mapping, \u0026(bo_va)-\u003evalids, list) and\ndereferences bo_va, causing a NULL pointer dereference.\n\nThis is reachable by any process able to issue the ioctl (render group)\nsimply by requesting mapping info for an unmapped BO.\n\nReturn -ENOENT when no bo_va is found, jumping to out_exec so the\ndrm_exec context and GEM object reference are released.\n\n(cherry picked from commit 528b19377affc1cc7362a70a254c1dda793595f9)",
  "id": "GHSA-4c3m-c328-j6mf",
  "modified": "2026-08-10T15:33:44Z",
  "published": "2026-08-10T15:33:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68275"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/93475c34111916df71c63e510fc52db01351f809"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9faf4c66edb6bcb8ca0465c3a4868bb7f278cd31"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ddba17b3dfa0efc80d6c98621c2fb7af66adb622"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-68275 (GCVE-0-2026-68275)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:01 – Updated: 2026-08-17 05:02

Title

drm/amdgpu: check amdgpu_vm_bo_find() result in GET_MAPPING_INFO

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: check amdgpu_vm_bo_find() result in GET_MAPPING_INFO The AMDGPU_GEM_OP_GET_MAPPING_INFO path of amdgpu_gem_op_ioctl() looks up the bo_va for the buffer object in the caller's VM via amdgpu_vm_bo_find(), but uses the returned pointer without checking it. amdgpu_vm_bo_find() returns NULL when the BO has no bo_va in that VM, which is the normal case for a BO that has never been mapped. The result is fed straight into amdgpu_vm_bo_va_for_each_valid_mapping(), which expands to list_for_each_entry(mapping, &(bo_va)->valids, list) and dereferences bo_va, causing a NULL pointer dereference. This is reachable by any process able to issue the ioctl (render group) simply by requesting mapping info for an unmapped BO. Return -ENOENT when no bo_va is found, jumping to out_exec so the drm_exec context and GEM object reference are released. (cherry picked from commit 528b19377affc1cc7362a70a254c1dda793595f9)

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/ddba17b3dfa0efc80…
https://git.kernel.org/stable/c/9faf4c66edb6bcb8c…
https://git.kernel.org/stable/c/93475c34111916df7…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4d82724f7f2b847eb0454b1aab5450545b39abd4 , < ddba17b3dfa0efc80d6c98621c2fb7af66adb622 (git) Affected: 4d82724f7f2b847eb0454b1aab5450545b39abd4 , < 9faf4c66edb6bcb8ca0465c3a4868bb7f278cd31 (git) Affected: 4d82724f7f2b847eb0454b1aab5450545b39abd4 , < 93475c34111916df71c63e510fc52db01351f809 (git)
Linux	Linux	Affected: 6.18 Unaffected: 0 , < 6.18 (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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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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            },
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              "status": "affected",
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          "vendor": "Linux",
          "versions": [
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            },
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              "versionType": "semver"
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              "status": "unaffected",
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              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: check amdgpu_vm_bo_find() result in GET_MAPPING_INFO\n\nThe AMDGPU_GEM_OP_GET_MAPPING_INFO path of amdgpu_gem_op_ioctl() looks\nup the bo_va for the buffer object in the caller\u0027s VM via\namdgpu_vm_bo_find(), but uses the returned pointer without checking it.\n\namdgpu_vm_bo_find() returns NULL when the BO has no bo_va in that VM,\nwhich is the normal case for a BO that has never been mapped. The result\nis fed straight into amdgpu_vm_bo_va_for_each_valid_mapping(), which\nexpands to list_for_each_entry(mapping, \u0026(bo_va)-\u003evalids, list) and\ndereferences bo_va, causing a NULL pointer dereference.\n\nThis is reachable by any process able to issue the ioctl (render group)\nsimply by requesting mapping info for an unmapped BO.\n\nReturn -ENOENT when no bo_va is found, jumping to out_exec so the\ndrm_exec context and GEM object reference are released.\n\n(cherry picked from commit 528b19377affc1cc7362a70a254c1dda793595f9)"
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        },
        {
          "url": "https://git.kernel.org/stable/c/93475c34111916df71c63e510fc52db01351f809"
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    "datePublished": "2026-08-10T12:01:50.777Z",
    "dateReserved": "2026-07-30T09:28:09.379Z",
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}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-4C3M-C328-J6MF

CVE-2026-68275 (GCVE-0-2026-68275)

Tags

Sightings

Nomenclature