SB2026032580 - Memory corruption in Linux kernel can
Published: March 25, 2026
Security Bulletin ID
SB2026032580
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Memory corruption (CVE-ID: CVE-2026-23362)
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.
Remediation
Install update from vendor's website.
References
- 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