CVE-2015-3217: IBM Powerkvm

High severity, CVSS 7.5. EPSS: 6.2% chance of exploitation in the next 30 days.

PCRE 7.8 and 8.32 through 8.37, and PCRE2 10.10 mishandle group empty matches, which might allow remote attackers to cause a denial of service (stack-based buffer overflow) via a crafted regular expression, as demonstrated by /^(?:(?(1)\\.|([^\\\\W_])?)+)+$/.

Affected products

• IBM Powerkvm: version 2.1 only; version 3.1 only
• Pcre Pcre: version 7.8 only; version 8.32 only; version 8.33 only; version 8.34 only; version 8.35 only; version 8.36 only; …
• Pcre PCRE2: version 10.10 only

Published 2016-12-13. Last modified 2026-06-17.