SB2026062969 - Improper handling of exceptional conditions in Linux kernel phonet

Description

This security bulletin contains information about 1 vulnerability.

1) Improper handling of exceptional conditions (CVE-ID: CVE-2026-53292)

CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions

CVSSv4: 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

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper exception handling in pn_socket_autobind() in net/phonet/socket.c when handling socket autobind during send operations. A local user can trigger a failed bind condition that reaches a BUG_ON() assertion to cause a denial of service.

The issue is reachable from a user-triggerable path and can panic the kernel when pn_socket_bind() returns -EINVAL while the socket port remains unset.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/5b0c911bcdbd982f7748d11c0b39ec5808eae2de
• https://git.kernel.org/stable/c/6db58ee730bf434d1afca91b91826e26688856ed