CVE-2019-20838

Description

libpcre in PCRE before 8.43 allows a subject buffer over-read in JIT when UTF is disabled, and \X or \R has more than one fixed quantifier, a related issue to CVE-2019-20454.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.20%
Vendor Advisory apple.com Vendor Advisory apple.com Vendor Advisory pcre.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://bugs.gentoo.org/717920 patch vdb entry third party advisory issue tracking
https://www.pcre.org/original/changelog.txt release notes vendor advisory
https://support.apple.com/kb/HT211931 vendor advisory
http://seclists.org/fulldisclosure/2020/Dec/32 third party advisory mailing list
https://support.apple.com/kb/HT212147 vendor advisory
http://seclists.org/fulldisclosure/2021/Feb/14 third party advisory mailing list
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2019-20838?
CVE-2019-20838 has been scored as a high severity vulnerability.
How to fix CVE-2019-20838?
To fix CVE-2019-20838, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-20838 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-20838 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.