PCRE before 8.38 mishandles the [: and \ substrings in character classes, which allows remote attackers to cause a denial of service (uninitialized memory read) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-8390
• https://bto.bluecoat.com/security-advisory/sa128
• https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
• https://security.gentoo.org/glsa/201607-02
• http://lists.fedoraproject.org/pipermail/package-announce/2016-January/174931.html
• http://vcs.pcre.org/pcre/code/trunk/ChangeLog?view=markup
• http://www.openwall.com/lists/oss-security/2015/11/29/1
• http://www.securityfocus.com/bid/82990
• https://security.netapp.com/advisory/ntap-20230216-0002/