SB2026062689 - Double free in Linux kernel core
Published: June 26, 2026
Security Bulletin ID
SB2026062689
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-2026-53233)
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 double free in netdev_nl_bind_rx_doit() in net/core/netdev-genl.c when handling netlink bind requests that trigger a genlmsg_reply() failure. A local user can send a crafted request with an already-full receive buffer to cause a denial of service.
Remediation
Install update from vendor's website.