CVE-2026-46211
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
A vulnerability has been identified in the Linux kernel within the msm_ioctl_gem_info_get_metadata() function, which always returns 0, ignoring errors. This causes userspace to incorrectly interpret that the ioctl call succeeded when it did not.
Risk Assessment
Organizations may be exposed to false positive operation results, potentially leading to application malfunctions and security vulnerabilities.
Recommendation
It is recommended to update the Linux kernel to the latest version to patch this vulnerability and to monitor applications using ioctl functions for potential issues.
Original NVD description (English source)
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/