In the Linux kernel, the following vulnerability has been resolved:
arm64/gcs: Fix error handling in arch_set_shadow_stack_status()
alloc_gcs() returns an error-encoded pointer on failure, which comes from do_mmap(), not NULL.
The current NULL check fails to detect errors, which could lead to using an invalid GCS address.
Use IS_ERR_VALUE() to properly detect errors, consistent with the check in gcs_alloc_thread_stack().
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
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