PCRE is vulnerable to integer overflow. The vulnerability exist because the number larger then the limit of the C substring is not sanitized.
seclists.org/fulldisclosure/2020/Dec/32
seclists.org/fulldisclosure/2021/Feb/14
about.gitlab.com/releases/2020/07/01/security-release-13-1-2-release/
bugs.gentoo.org/717920
lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E
secdb.alpinelinux.org/v3.10/main.yaml
secdb.alpinelinux.org/v3.11/main.yaml
secdb.alpinelinux.org/v3.12/main.yaml
secdb.alpinelinux.org/v3.9/main.yaml
support.apple.com/kb/HT211931
support.apple.com/kb/HT212147
www.oracle.com/security-alerts/cpuapr2022.html
www.pcre.org/original/changelog.txt