Always-Incorrect Control Flow Implementation in Linux kernel - CVE-2026-68118
Published: August 12, 2026
Vulnerability identifier: #VU142212
CSH Severity: Medium
CVSS v4: 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]
CVE-ID: CVE-2026-68118
CWE-ID: CWE-670
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper handling of reset packets in tcp_check_req() when processing in-window RST segments in the SYN-RECEIVED request-socket path. A remote attacker can send a specially crafted non-exact RST packet to cause a denial of service.
The issue affects connection handling before a connection is fully established.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-68118
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.105-1
linux (Debian package) - update to 6.12.105-1