SB2026051456 - Double free in Linux kernel shaper
Published: May 14, 2026
Security Bulletin ID
SB2026051456
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) Double free (CVE-ID: CVE-2026-43481)
CWE-ID: CWE-415 - Double Free
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 a double free in net_shaper_nl_get_doit() and net_shaper_nl_cap_get_doit() when handling netlink reply messages after genlmsg_reply() failure. A local user can trigger an error path that frees the same skb twice to cause a denial of service.
Remediation
Install update from vendor's website.