Memory corruption in Linux kernel - CVE-2026-23362
Published: March 25, 2026
Vulnerability identifier: #VU124476
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-2026-23362
CWE-ID: CWE-119
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 cause a denial of service.
The vulnerability exists due to improper memory management in the CAN BCM (Broadcast Manager) subsystem when handling runtime updates of bcm_op structures. A local user can send a specially crafted request to trigger a use of an uninitialized spinlock, leading to a system crash.
The issue specifically occurs in the bcm_rx_setup() function, where the bcm_tx_lock is not initialized when the RX_RTR_FRAME flag is set, which can lead to undefined behavior during lock operations.
How to mitigate CVE-2026-23362
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/70e951afad4c025261fe3c952d2b07237e320a01
- https://git.kernel.org/stable/c/800f26f11ae37b17f58e0001f28a47dd75c26557
- https://git.kernel.org/stable/c/8215ba7bc99e84e66fd6938874ec4330a9d96518
- https://git.kernel.org/stable/c/8bcf2d847adb82b2c617456f6da17ac5e6c75285
- https://git.kernel.org/stable/c/c35636e91e392e1540949bbc67932167cb48bc3a
- https://git.kernel.org/stable/c/f0c349b2c21b220af5ba19f29b885e222958d796