CVE-2026-45876

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 v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/53c998527ffa60f9deda8974a11ad39790684159	Patch
https://git.kernel.org/stable/c/a4741114c9622346c4bbb8cc2bbd88153616ffaf	Patch
https://git.kernel.org/stable/c/c787a235deb33be6eda40beee8f561da5fd8cb8c	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

25 Jun 2026, 21:11

Type	Values Removed	Values Added
References	~~() https://git.kernel.org/stable/c/53c998527ffa60f9deda8974a11ad39790684159 -~~	() https://git.kernel.org/stable/c/53c998527ffa60f9deda8974a11ad39790684159 - Patch
References	~~() https://git.kernel.org/stable/c/a4741114c9622346c4bbb8cc2bbd88153616ffaf -~~	() https://git.kernel.org/stable/c/a4741114c9622346c4bbb8cc2bbd88153616ffaf - Patch
References	~~() https://git.kernel.org/stable/c/c787a235deb33be6eda40beee8f561da5fd8cb8c -~~	() https://git.kernel.org/stable/c/c787a235deb33be6eda40beee8f561da5fd8cb8c - Patch
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
CWE		CWE-476
First Time		Linux linux Kernel Linux
CPE		cpe:2.3:o:linux:linux_kernel::::::::

27 May 2026, 14:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-27 14:17

Updated : 2026-06-25 21:11

NVD link : CVE-2026-45876

Mitre link : CVE-2026-45876

CVE.ORG link : CVE-2026-45876

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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