Integer overflow in PCRE2 - #VU146525
Published: August 31, 2026
Vulnerability identifier: #VU146525
CSH Severity: Low
CVSS v4: 5.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause memory corruption and a process crash.
The vulnerability exists due to integer overflow leading to an out-of-bounds write in pcre2_pattern_convert() when processing a very large attacker-controlled pattern using PCRE2-managed output allocation on a 32-bit system. A remote attacker can supply a specially crafted large foreign-syntax pattern to cause memory corruption and a process crash.
The issue occurs before pattern compilation or matching, and requires a 32-bit process with a non-NULL buffptr whose value is NULL.
Affected software
PCRE2
Remediation
Install security update from vendor's website.
PCRE2 - update to 10.48