FKIE_CVE-2026-46211

Vulnerability from fkie_nvd - Published: 2026-05-28 10:16 - Updated: 2026-05-28 13:44
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/msm/gem: fix error handling in msm_ioctl_gem_info_get_metadata() msm_ioctl_gem_info_get_metadata() always returns 0 regardless of errors. When copy_to_user() fails or the user buffer is too small, the error code stored in ret is ignored because the function unconditionally returns 0. This causes userspace to believe the ioctl succeeded when it did not. Additionally, kmemdup() can return NULL on allocation failure, but the return value is not checked. This leads to a NULL pointer dereference in the subsequent copy_to_user() call. Add the missing NULL check for kmemdup() and return ret instead of 0. Note that the SET counterpart (msm_ioctl_gem_info_set_metadata) correctly returns ret. Patchwork: https://patchwork.freedesktop.org/patch/714478/
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/47cbfe2608314b833ad61a65827d8fb363bc2d2d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/697e1a9559f6962f999cc4c748c2ffffcc0a7a7a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b079e85c91f446f29e808d8291189e897f1884ff
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c57c861956b89f2e2528e6384d51e2dedd915809
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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/msm/gem: fix error handling in msm_ioctl_gem_info_get_metadata()\n\nmsm_ioctl_gem_info_get_metadata() always returns 0 regardless of\nerrors. When copy_to_user() fails or the user buffer is too small,\nthe error code stored in ret is ignored because the function\nunconditionally returns 0. This causes userspace to believe the\nioctl succeeded when it did not.\n\nAdditionally, kmemdup() can return NULL on allocation failure, but\nthe return value is not checked. This leads to a NULL pointer\ndereference in the subsequent copy_to_user() call.\n\nAdd the missing NULL check for kmemdup() and return ret instead of 0.\n\nNote that the SET counterpart (msm_ioctl_gem_info_set_metadata)\ncorrectly returns ret.\n\nPatchwork: https://patchwork.freedesktop.org/patch/714478/"
    }
  ],
  "id": "CVE-2026-46211",
  "lastModified": "2026-05-28T13:44:01.663",
  "metrics": {},
  "published": "2026-05-28T10:16:36.760",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/47cbfe2608314b833ad61a65827d8fb363bc2d2d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/697e1a9559f6962f999cc4c748c2ffffcc0a7a7a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b079e85c91f446f29e808d8291189e897f1884ff"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c57c861956b89f2e2528e6384d51e2dedd915809"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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