Linux Kernel DRM: Potential NULL Deref in ioctl_gem_info_get_metadata
CVE-2026-46211 Published on May 28, 2026
drm/msm/gem: fix error handling in msm_ioctl_gem_info_get_metadata()
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/
Products Associated with CVE-2026-46211
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Affected Versions
Linux:- Version 9902cb999e4e913d98e8afe4b36c08e4a793e1ce and below 697e1a9559f6962f999cc4c748c2ffffcc0a7a7a is affected.
- Version 9902cb999e4e913d98e8afe4b36c08e4a793e1ce and below c57c861956b89f2e2528e6384d51e2dedd915809 is affected.
- Version 9902cb999e4e913d98e8afe4b36c08e4a793e1ce and below b079e85c91f446f29e808d8291189e897f1884ff is affected.
- Version 9902cb999e4e913d98e8afe4b36c08e4a793e1ce and below 47cbfe2608314b833ad61a65827d8fb363bc2d2d is affected.
- Version 6.8 is affected.
- Before 6.8 is unaffected.
- Version 6.12.90, <= 6.12.* is unaffected.
- Version 6.18.32, <= 6.18.* is unaffected.
- Version 7.0.9, <= 7.0.* is unaffected.
- Version 7.1-rc1, <= * is unaffected.