Off-by-one in FreeBSD - CVE-2026-101302
Published: September 30, 2026
Vulnerability identifier: #VU152945
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-2026-101302
CWE-ID: CWE-193
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 an off-by-one error in the receive-side kernel TLS record-type search when processing a specially crafted TLS 1.3 record. A remote attacker can send a specially crafted TLS 1.3 record to cause a denial of service.
Exploitation requires an application to enable receive-side software KTLS.
Affected software
FreeBSD
How to mitigate CVE-2026-101302
Install security update from vendor's website.