CVE-2017-8399

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-05-01 · updated 2026-06-17
Weakness: CWE-119

Description

PCRE2 before 10.30 has an out-of-bounds write caused by a stack-based buffer overflow in pcre2_match.c, related to a "pattern with very many captures."

Affected products

PCRE2: before 10.30 — fixed in 10.30

How to fix

Upgrade to a fixed version: PCRE2 10.30. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/98315
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=783
https://security.gentoo.org/glsa/201710-09
https://vcs.pcre.org/pcre2/code/tags/pcre2-10.30/ChangeLog?revision=854&view=markup
https://vcs.pcre.org/pcre2?view=revision&revision=674
http://www.securityfocus.com/bid/98315
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=783
https://security.gentoo.org/glsa/201710-09
https://vcs.pcre.org/pcre2/code/tags/pcre2-10.30/ChangeLog?revision=854&view=markup
https://vcs.pcre.org/pcre2?view=revision&revision=674

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