RHSA-2026:92901HighCVSS 8.2

Red Hat Security Advisory: pcre2 security update

Published
October 29, 2026
Last Modified
October 30, 2026

🔗 CVE IDs covered (2)

CVE-2026-86145 →CVE-2026-103111 →

📋 Description

CVE-2026-86145 — pcre2: PCRE2: Out-of-bounds write allows arbitrary code execution via crafted regular expressions CVE-2026-103111 — pcre2: pcre2: Out-of-bounds write via crafted regular expression

🎯 Affected products40

  • Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • pcre2-0:10.32-2.el8_4.1.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • pcre2-0:10.32-2.el8_4.1.i686 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • pcre2-0:10.32-2.el8_4.1.src as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • pcre2-0:10.32-2.el8_4.1.src as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • pcre2-0:10.32-2.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • pcre2-0:10.32-2.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • pcre2-debuginfo-0:10.32-2.el8_4.1.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • pcre2-debuginfo-0:10.32-2.el8_4.1.i686 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • pcre2-debuginfo-0:10.32-2.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • pcre2-debuginfo-0:10.32-2.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • pcre2-debugsource-0:10.32-2.el8_4.1.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • pcre2-debugsource-0:10.32-2.el8_4.1.i686 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • pcre2-debugsource-0:10.32-2.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • pcre2-debugsource-0:10.32-2.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • pcre2-devel-0:10.32-2.el8_4.1.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • pcre2-devel-0:10.32-2.el8_4.1.i686 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • pcre2-devel-0:10.32-2.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • pcre2-devel-0:10.32-2.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • pcre2-tools-debuginfo-0:10.32-2.el8_4.1.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • pcre2-tools-debuginfo-0:10.32-2.el8_4.1.i686 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • pcre2-tools-debuginfo-0:10.32-2.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • pcre2-tools-debuginfo-0:10.32-2.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • pcre2-utf16-0:10.32-2.el8_4.1.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • pcre2-utf16-0:10.32-2.el8_4.1.i686 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • pcre2-utf16-0:10.32-2.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • pcre2-utf16-0:10.32-2.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • pcre2-utf16-debuginfo-0:10.32-2.el8_4.1.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • pcre2-utf16-debuginfo-0:10.32-2.el8_4.1.i686 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • +10 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: To mitigate this Improper Protection of Alternate Path vulnerability, ensure that secondary execution branches—such as the reuse of cached memory workspaces—enforce the exact same size and boundary checks as the primary memory allocation paths. Limit exposure by preventing untrusted user input from directly controlling PCRE2 regular expressions, and strictly avoid utilizing recursive matching patterns when operating under a low heap limit. Apply a defense-in-depth strategy by validating all inputs comprehensively. Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

🔗 References (5)