High (7.5). EPSS 28% chance of exploitation in the next 30 days.
The tls_decrypt_ticket function in ssl/t1_lib.c in OpenSSL before 1.1.0 does not consider the HMAC size during validation of the ticket length, which allows remote attackers to cause a denial of service via a ticket that is too short.
Severity
CVSS 3.0
7.5 high
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
28% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)