Medium 5.5Published May 27, 2026

CVE-2026-45876arm64/gcs: Fix error handling in arch_set_shadow_stack_status()

Updated under an hour ago (Oct 26, 2026, 6:10 AM ET)

Does this affect you?

It affects Linux and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from b57180c75c7ebff6613886cb69ef6e283a10358b before c787a235deb33be6eda40beee8f561da5fd8cb8c; from b57180c75c7ebff6613886cb69ef6e283a10358b before a4741114c9622346c4bbb8cc2bbd88153616ffaf; from b57180c75c7ebff6613886cb69ef6e283a10358b before 53c998527ffa60f9deda8974a11ad39790684159	CNA record
linux linux_kernel linux:linux_kernel	from 6.13 before 6.18.14; from 6.19 before 6.19.4	NVD

References

https://git.kernel.org/stable/c/c787a235deb33be6eda40beee8f561da5fd8cb8cpatch
https://git.kernel.org/stable/c/a4741114c9622346c4bbb8cc2bbd88153616ffafpatch
https://git.kernel.org/stable/c/53c998527ffa60f9deda8974a11ad39790684159patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.