CVE-2026-86145

Description

PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-3r4p-g7gg-ppmf
• https://github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.48
• http://www.openwall.com/lists/oss-security/2026/09/05/3