SB20260507282 - NULL pointer dereference in Linux kernel netfilter ipvs
Published: May 7, 2026
Security Bulletin ID
SB20260507282
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) NULL pointer dereference (CVE-ID: CVE-2026-43086)
CWE-ID: CWE-476 - NULL Pointer Dereference
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 null pointer dereference in ip_vs_add_service error handling when processing a crafted IPVS service configuration that causes ip_vs_start_estimator() to fail after a scheduler has been successfully bound. A local user can trigger the vulnerable error path to cause a denial of service.
The issue results in a kernel panic.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/4039959315008888dd53c37674d33351817a5166
- https://git.kernel.org/stable/c/730663352c9178f33fcf5929f4a37c1f1ca5a693
- https://git.kernel.org/stable/c/9a91797e61d286805ae10a92cc48959c30800556
- https://git.kernel.org/stable/c/a32dabacee111cea083ddd57a03635672e1bff29
- https://git.kernel.org/stable/c/c2ddbe577e2ebf63f2d8fb15cdc7503af70f3e94