RHSA-2021:4373LowCVSS 7.5

Red Hat Security Advisory: pcre security update

Published
November 9, 2021
Last Modified
August 4, 2026

🔗 CVE IDs covered (2)

CVE-2019-20838 →CVE-2020-14155 →

📋 Description

CVE-2019-20838 — pcre: Buffer over-read in JIT when UTF is disabled and \X or \R has fixed quantifier greater than 1 CVE-2020-14155 — pcre: Integer overflow when parsing callout numeric arguments

🎯 Affected products93

  • Red Hat CodeReady Linux Builder (v. 8)
  • Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-0:8.42-6.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-0:8.42-6.el8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-0:8.42-6.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-0:8.42-6.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-0:8.42-6.el8.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-0:8.42-6.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-cpp-0:8.42-6.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-cpp-0:8.42-6.el8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-cpp-0:8.42-6.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-cpp-0:8.42-6.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-cpp-0:8.42-6.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-cpp-debuginfo-0:8.42-6.el8.aarch64 as a component of Red Hat CodeReady Linux Builder (v. 8)
  • pcre-cpp-debuginfo-0:8.42-6.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-cpp-debuginfo-0:8.42-6.el8.i686 as a component of Red Hat CodeReady Linux Builder (v. 8)
  • pcre-cpp-debuginfo-0:8.42-6.el8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-cpp-debuginfo-0:8.42-6.el8.ppc64le as a component of Red Hat CodeReady Linux Builder (v. 8)
  • pcre-cpp-debuginfo-0:8.42-6.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-cpp-debuginfo-0:8.42-6.el8.s390x as a component of Red Hat CodeReady Linux Builder (v. 8)
  • pcre-cpp-debuginfo-0:8.42-6.el8.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-cpp-debuginfo-0:8.42-6.el8.x86_64 as a component of Red Hat CodeReady Linux Builder (v. 8)
  • pcre-cpp-debuginfo-0:8.42-6.el8.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-debuginfo-0:8.42-6.el8.aarch64 as a component of Red Hat CodeReady Linux Builder (v. 8)
  • pcre-debuginfo-0:8.42-6.el8.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-debuginfo-0:8.42-6.el8.i686 as a component of Red Hat CodeReady Linux Builder (v. 8)
  • pcre-debuginfo-0:8.42-6.el8.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-debuginfo-0:8.42-6.el8.ppc64le as a component of Red Hat CodeReady Linux Builder (v. 8)
  • pcre-debuginfo-0:8.42-6.el8.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • pcre-debuginfo-0:8.42-6.el8.s390x as a component of Red Hat CodeReady Linux Builder (v. 8)
  • +63 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Do not use more than one fixed quantifier with \R or \X with UTF disabled in PCRE or PCRE2, as these are the conditions needed to trigger the flaw. Workaround: This flaw can be mitigated by not compiling regular expressions with a callout value greater outside of 0-255 or handling the value passed to the callback within the application code.

🔗 References (6)