SB2026060610 - Ubuntu update for linux-fips
Published: June 6, 2026
Security Bulletin ID
SB2026060610
CSH 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 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-31504)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/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 a use-after-free in packet_release() and fanout group handling when processing a concurrent NETDEV_UP event during socket release. A local user can trigger a race condition to cause a denial of service.
The issue affects fanout sockets during a race that can leave a dangling pointer in the fanout array.
Remediation
Install update from vendor's website.