SB20260815309 - Use-after-free in Linux kernel ipv4
Published: August 15, 2026
Security Bulletin ID
SB20260815309
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-2026-72405)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [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]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in udp_tunnel_nic_device_sync_work() when handling concurrent device operations. A local user can trigger concurrent device operations to cause a denial of service.
The issue arises because a second work item can remain queued while the associated structure is freed.
Remediation
Install update from vendor's website.