Description
An out-of-bounds read was discovered in PCRE before 10.34 when the pattern \X is JIT compiled and used to match specially crafted subjects in non-UTF mode. Applications that use PCRE to parse untrusted input may be vulnerable to this flaw, which would allow an attacker to crash the application. The flaw occurs in do_extuni_no_utf in pcre2_jit_compile.c.
Affected products
pcre: pcre2; fedoraproject: fedora; splunk: universal forwarder
References10
- bugzilla.redhat.com/show_bug.cgi?id=1735494 Issue TrackingPatchThird Party Advisory
- vcs.pcre.org/pcre2?view=revision&revision=1092 Broken LinkPatch
- bugzilla.redhat.com/show_bug.cgi?id=1735494 Issue TrackingPatchThird Party Advisory
- vcs.pcre.org/pcre2?view=revision&revision=1092 Broken LinkPatch
- bugs.php.net/bug.php?id=78338 ExploitIssue TrackingThird Party Advisory
- bugs.php.net/bug.php?id=78338 ExploitIssue TrackingThird Party Advisory
- bugs.exim.org/show_bug.cgi?id=2421 Issue TrackingPermissions RequiredThird Party Advisory
- lists.debian.org/debian-lts-announce/2023/03/msg00014.html Mailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.… Mailing ListThird Party Advisory
- security.gentoo.org/glsa/202006-16 Third Party Advisory
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 2% percentile: 76 · as of 11 November 2026
- CWE
- CWE-125
Could this be exploited in your environment?
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