CVE-2026-46211: drm/msm/gem: fix error handling in msm_ioctl_gem_info_get_metadata()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-28 · updated 2026-06-17
Weakness: CWE-476

Description

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/

Affected products

Linux kernel: from 6.8 before 6.12.90; from 6.13 before 6.18.32; from 6.19 before 7.0.9 — fixed in 6.12.90, 6.18.32, 7.0.9

How to fix

Upgrade to a fixed version: Linux kernel 6.12.90, 6.18.32, 7.0.9. Check the vendor advisory for mitigations.

References

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