CVE-2026-45876

MediumCVSS 5.5/10Last modified Jun 25, 2026

Description

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().

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

No affected versions have been published.

Timeline

Published
May 27, 2026
Last modified
Jun 25, 2026
NVD status
Analyzed

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CVE-2026-45876: Medium severity, CVSS 5.5 | Vulnix