What’s Vulnerable › Vulnerabilities

CVE-2025-58050: PCRE2: heap-buffer-overflow read in match_ref due to missing boundary restoration in SCS

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-08-27 · updated 2026-06-17
• Weakness: CWE-122

Description

The PCRE2 library is a set of C functions that implement regular expression pattern matching. In version 10.45, a heap-buffer-overflow read vulnerability exists in the PCRE2 regular expression matching engine, specifically within the handling of the (*scs:...) (Scan SubString) verb when combined with (*ACCEPT) in src/pcre2_match.c. This vulnerability may potentially lead to information disclosure if the out-of-bounds data read during the memcmp affects the final match result in a way observable by the attacker. This issue has been resolved in version 10.46.

Affected products

• PCRE2: 10.45

References

• https://github.com/PCRE2Project/pcre2/commit/a141712e5967d448c7ce13090ab530c8e3d82254
• https://github.com/PCRE2Project/pcre2/releases/tag/pcre2-10.46
• https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-c2gv-xgf5-5cc2
• https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-c2gv-xgf5-5cc2

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