SB2026040670 - Memory corruption in Linux kernel net
Published: April 6, 2026
Security Bulletin ID
SB2026040670
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) Memory corruption (CVE-ID: CVE-2026-23459)
CWE-ID: CWE-119 - Memory corruption
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 attacker to cause a denial of service.
The vulnerability exists due to memory corruption in iptunnel_xmit_stats() when updating tunnel transmit statistics for vxlan or geneve traffic. A local attacker can trigger the vulnerable code path to cause a denial of service.
On 32-bit kernels, overwriting the syncp sequence could lead to corruption or system freezes.
Remediation
Install update from vendor's website.