Critical (9.1). EPSS 5.3% chance of exploitation in the next 30 days.
OCaml before 4.03.0 does not properly handle sign extensions, which allows remote attackers to conduct buffer overflow attacks or obtain sensitive information as demonstrated by a long string to the String.copy function.
Severity
CVSS 3.0
9.1 critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS
5.3% chance of exploitation in the next 30 days; higher than 92% of CVEs (scores of 2026-10-31)