SB20260828144 - Type conversion in Linux kernel netfilter
Published: August 28, 2026
Security Bulletin ID
SB20260828144
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Type conversion (CVE-ID: CVE-2026-80637)
CWE-ID: CWE-704 - Type conversion
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper handling of unaligned memory access in synproxy timestamp adjustment in netfilter synproxy when processing crafted TCP packets with timestamp options. A remote attacker can send specially crafted network packets to cause a denial of service.
The issue may lead to a crash on strict alignment architectures.
Remediation
Install update from vendor's website.