Improper control of a resource through its lifetime in Linux kernel - CVE-2026-74750
Published: August 27, 2026
Vulnerability identifier: #VU145978
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-74750
CWE-ID: CWE-664
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 resource shutdown in ovpn key slot crypto teardown when freeing AEAD transforms from an RCU callback. A remote attacker can trigger release of crafted key material handling to cause a denial of service.
The issue affects crypto implementations where AEAD transform teardown may sleep, including async or hardware-backed implementations.
Affected software
Linux kernel
How to mitigate CVE-2026-74750
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3