Out-of-bounds read in Linux kernel - CVE-2023-52476
Published: April 18, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU88821
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-52476
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition within the branch_type() and get_branch_type() functions in arch/x86/events/utils.c. A local user can trigger an out-of-bounds read error and crash the kernel.
How to mitigate CVE-2023-52476
Install updates from vendor's website.
Sources
- https://git.kernel.org/stable/c/403d201d1fd144cb249836dafb222f6375871c6c
- https://git.kernel.org/stable/c/3863989497652488a50f00e96de4331e5efabc6c
- https://git.kernel.org/stable/c/f71edacbd4f99c0e12fe4a4007ab4d687d0688db
- https://git.kernel.org/stable/c/e53899771a02f798d436655efbd9d4b46c0f9265
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.137
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.59
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.8
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6