CVE-2007-4768

: pcre before 7.3 incorrect unicode in char class optimization

Heap-based buffer overflow in Perl-Compatible Regular Expression (PCRE) library before 7.3 allows context-dependent attackers to execute arbitrary code via a singleton Unicode sequence in a character class in a regex pattern, which is incorrectly optimized.

CVSS 2.0 · 6.8 Medium EPSS 4.1% KEV · Not listed

Vendors

Pcre Redhat

Products

Pcre Rhel Extras

CVE-2008-0674

pcre: buffer overflow via large UTF-8 character class

Buffer overflow in PCRE before 7.6 allows remote attackers to execute arbitrary code via a regular expression containing a character class with a large number of characters with Unicode code points greater than 255.

CVSS 2.0 · 7.5 High EPSS 5.9% KEV · Not listed

Vendors

Pcre

Products

Pcre

CVE-2005-4872

pcre incorrect memory requirement computation

Perl-Compatible Regular Expression (PCRE) library before 6.2 does not properly count the number of named capturing subpatterns, which allows context-dependent attackers to cause a denial of service (crash) via a regular expression with a large number of named subpatterns, which triggers a buffer overflow. NOTE: this issue was originally subsumed by CVE-2006-7224, but that CVE has been REJECTED and split.

CVSS 2.0 · 4.3 Medium EPSS 2.3% KEV · Not listed

Vendors

Pcre Redhat

Products

Pcre Enterprise Linux

CVE-2005-2491

pcre heap overflow

Integer overflow in pcre_compile.c in Perl Compatible Regular Expressions (PCRE) before 6.2, as used in multiple products such as Python, Ethereal, and PHP, allows attackers to execute arbitrary code via quantifier values in regular expressions, which leads to a heap-based buffer overflow.

CVSS 2.0 · 7.5 High EPSS 4.3% KEV · Not listed

Vendors

Pcre Redhat

Products

Pcre Enterprise Linux

CVE-2025-58050

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

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.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed

Vendors

Pcre

Products

Pcre2

CVE-2017-7186

pcre: Invalid Unicode property lookup (8.41/7, 10.24/2)

libpcre1 in PCRE 8.40 and libpcre2 in PCRE2 10.23 allow remote attackers to cause a denial of service (segmentation violation for read access, and application crash) by triggering an invalid Unicode property lookup.

CVSS 3.0 · 7.5 High EPSS 5.0% KEV · Not listed

Vendors

Pcre Redhat

Products

Pcre Pcre2 Jboss Core Services

CVE-2017-7244

pcre: invalid memory read in _pcre32_xclass (pcre_xclass.c)

The _pcre32_xclass function in pcre_xclass.c in libpcre1 in PCRE 8.40 allows remote attackers to cause a denial of service (invalid memory read) via a crafted file.

CVSS 3.0 · 5.5 Medium EPSS 2.0% KEV · Not listed

Vendors

Pcre Redhat

Products

Pcre Jboss Core Services

CVE-2017-7245

pcre: stack-based buffer overflow write in pcre32_copy_substring

Stack-based buffer overflow in the pcre32_copy_substring function in pcre_get.c in libpcre1 in PCRE 8.40 allows remote attackers to cause a denial of service (WRITE of size 4) or possibly have unspecified other impact via a crafted file.

CVSS 3.0 · 7.8 High EPSS 2.4% KEV · Not listed

Vendors

Pcre Redhat

Products

Pcre Jboss Core Services

CVE-2017-7246

pcre: stack-based buffer overflow write in pcre32_copy_substring

Stack-based buffer overflow in the pcre32_copy_substring function in pcre_get.c in libpcre1 in PCRE 8.40 allows remote attackers to cause a denial of service (WRITE of size 268) or possibly have unspecified other impact via a crafted file.

CVSS 3.0 · 7.8 High EPSS 2.6% KEV · Not listed

Vendors

Pcre Redhat

Products

Pcre Jboss Core Services

CVE-2017-8786

pcre2: Heap-based buffer overflow in pcre2test.c

pcre2test.c in PCRE2 10.23 allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via a crafted regular expression.

CVSS 3.0 · 9.8 Critical EPSS 4.1% KEV · Not listed

Vendors

Pcre

Products

Pcre2

CVE-2017-8399

pcre2: Stack-based buffer overflow in pcre2_match.c

PCRE2 before 10.30 has an out-of-bounds write caused by a stack-based buffer overflow in pcre2_match.c, related to a "pattern with very many captures."

CVSS 3.0 · 9.8 Critical EPSS 3.1% KEV · Not listed

Vendors

Pcre

Products

Pcre2

CVE-2017-11164

pcre: OP_KETRMAX feature in the match function in pcre_exec.c

In PCRE 8.41, the OP_KETRMAX feature in the match function in pcre_exec.c allows stack exhaustion (uncontrolled recursion) when processing a crafted regular expression.

CVSS 3.0 · 7.5 High EPSS 3.1% KEV · Not listed

Vendors

Pcre

Products

Pcre

CVE-2017-6004

pcre: Out-of-bounds read in compile_bracket_matchingpath function (8.41/3)

The compile_bracket_matchingpath function in pcre_jit_compile.c in PCRE through 8.x before revision 1680 (e.g., the PHP 7.1.1 bundled version) allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted regular expression.

CVSS 3.0 · 7.5 High EPSS 4.5% KEV · Not listed

Vendors

Pcre Redhat

Products

Pcre Jboss Core Services

CVE-2015-3217

pcre: stack overflow caused by mishandled group empty match (8.38/11)

PCRE 7.8 and 8.32 through 8.37, and PCRE2 10.10 mishandle group empty matches, which might allow remote attackers to cause a denial of service (stack-based buffer overflow) via a crafted regular expression, as demonstrated by /^(?:(?(1)\\.|([^\\\\W_])?)+)+$/.

CVSS 3.0 · 7.5 High EPSS 6.2% KEV · Not listed

Vendors

Ibm Pcre Redhat

Products

Powerkvm Pcre Pcre2 and 2 more

CVE-2016-1283

pcre: heap buffer overflow in handling of duplicate named groups (8.39/14)

The pcre_compile2 function in pcre_compile.c in PCRE 8.38 mishandles the /((?:F?+(?:^(?(R)a+\"){99}-))(?J)(?'R'(?'R'<((?'RR'(?'R'\){97)?J)?J)(?'R'(?'R'\){99|(:(?|(?'R')(\k'R')|((?'R')))H'R'R)(H'R))))))/ pattern and related patterns with named subgroups, which allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

CVSS 3.1 · 9.8 Critical EPSS 7.8% KEV · Not listed

Vendors

Fedoraproject Oracle Pcre and 2 more

Products

Fedora Solaris Pcre and 2 more

CVE-2016-3191

pcre: workspace overflow for (*ACCEPT) with deeply nested parentheses (8.39/13, 10.22/12)

The compile_branch function in pcre_compile.c in PCRE 8.x before 8.39 and pcre2_compile.c in PCRE2 before 10.22 mishandles patterns containing an (*ACCEPT) substring in conjunction with nested parentheses, which allows remote attackers to execute arbitrary code or cause a denial of service (stack-based buffer overflow) via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror, aka ZDI-CAN-3542.

CVSS 3.0 · 9.8 Critical EPSS 8.4% KEV · Not listed

Vendors

Pcre Redhat

Products

Pcre Pcre2 Enterprise Linux and 1 more

CVE-2015-5073

pcre: buffer overflow for forward reference within backward assertion with excess closing parenthesis (8.38/18)

Heap-based buffer overflow in the find_fixedlength function in pcre_compile.c in PCRE before 8.38 allows remote attackers to cause a denial of service (crash) or obtain sensitive information from heap memory and possibly bypass the ASLR protection mechanism via a crafted regular expression with an excess closing parenthesis.

CVSS 3.0 · 9.1 Critical EPSS 7.7% KEV · Not listed

Vendors

Ibm Pcre Redhat

Products

Powerkvm Pcre Enterprise Linux and 1 more

CVE-2015-8391

pcre: inefficient posix character class syntax check (8.38/16)

The pcre_compile function in pcre_compile.c in PCRE before 8.38 mishandles certain [: nesting, which allows remote attackers to cause a denial of service (CPU consumption) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

CVSS 3.1 · 9.8 Critical EPSS 6.4% KEV · Not listed

Vendors

Fedoraproject Oracle Pcre and 2 more

Products

Fedora Linux Pcre and 9 more

CVE-2015-3210

pcre: buffer overflow caused by recursive back reference by name within certain group (8.38/4)

Heap-based buffer overflow in PCRE 8.34 through 8.37 and PCRE2 10.10 allows remote attackers to execute arbitrary code via a crafted regular expression, as demonstrated by /^(?P=B)((?P=B)(?J:(?P<B>c)(?P<B>a(?P=B)))>WGXCREDITS)/, a different vulnerability than CVE-2015-8384.

CVSS 3.1 · 9.8 Critical EPSS 9.2% KEV · Not listed

Vendors

Pcre Redhat

Products

Pcre Pcre2 Rhel Software Collections

CVE-2015-2328

pcre: infinite recursion compiling pattern with recursive reference in a group with indefinite repeat (8.36/20)

PCRE before 8.36 mishandles the /((?(R)a|(?1)))+/ pattern and related patterns with certain recursion, which allows remote attackers to cause a denial of service (segmentation fault) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

CVSS 2.0 · 7.5 High EPSS 5.2% KEV · Not listed

Vendors

Oracle Pcre Redhat

Products

Linux Pcre Enterprise Linux and 1 more