Bug 2528993 (CVE-2026-86145) - CVE-2026-86145 pcre2: PCRE2: Out-of-bounds write allows arbitrary code execution via crafted regular expressions
Summary: CVE-2026-86145 pcre2: PCRE2: Out-of-bounds write allows arbitrary code execut...
Keywords:
Status: NEW
Alias: CVE-2026-86145
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2531860 2531859
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-05 05:21 UTC by OSIDB Bzimport
Modified: 2026-10-22 15:21 UTC (History)
21 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2026:81842 0 None None None 2026-10-13 04:29:15 UTC
Red Hat Product Errata RHBA-2026:82816 0 None None None 2026-10-14 08:57:44 UTC
Red Hat Product Errata RHBA-2026:82863 0 None None None 2026-10-14 10:58:06 UTC
Red Hat Product Errata RHBA-2026:82874 0 None None None 2026-10-14 11:08:13 UTC
Red Hat Product Errata RHBA-2026:82905 0 None None None 2026-10-14 13:54:51 UTC
Red Hat Product Errata RHBA-2026:82950 0 None None None 2026-10-14 14:28:36 UTC
Red Hat Product Errata RHBA-2026:83081 0 None None None 2026-10-14 16:33:04 UTC
Red Hat Product Errata RHBA-2026:83557 0 None None None 2026-10-15 11:59:25 UTC
Red Hat Product Errata RHBA-2026:83559 0 None None None 2026-10-15 11:49:29 UTC
Red Hat Product Errata RHBA-2026:84981 0 None None None 2026-10-19 12:29:24 UTC
Red Hat Product Errata RHBA-2026:85192 0 None None None 2026-10-19 14:11:17 UTC
Red Hat Product Errata RHBA-2026:85196 0 None None None 2026-10-19 14:03:18 UTC
Red Hat Product Errata RHBA-2026:86043 0 None None None 2026-10-20 16:56:30 UTC
Red Hat Product Errata RHSA-2026:81522 0 None None None 2026-10-12 21:30:26 UTC
Red Hat Product Errata RHSA-2026:81532 0 None None None 2026-10-12 22:26:43 UTC
Red Hat Product Errata RHSA-2026:81613 0 None None None 2026-10-12 23:13:35 UTC
Red Hat Product Errata RHSA-2026:82845 0 None None None 2026-10-14 09:33:03 UTC
Red Hat Product Errata RHSA-2026:82875 0 None None None 2026-10-14 15:05:30 UTC
Red Hat Product Errata RHSA-2026:82876 0 None None None 2026-10-14 13:54:58 UTC
Red Hat Product Errata RHSA-2026:84799 0 None None None 2026-10-19 11:14:52 UTC
Red Hat Product Errata RHSA-2026:86205 0 None None None 2026-10-20 21:50:26 UTC
Red Hat Product Errata RHSA-2026:86206 0 None None None 2026-10-20 21:53:37 UTC

Description OSIDB Bzimport 2026-09-05 05:21:17 UTC 
PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).
Comment 3 Jon Orris 2026-10-12 21:30:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:81522 https://access.redhat.com/errata/RHSA-2026:81522
Comment 4 Jon Orris 2026-10-12 22:26:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:81532 https://access.redhat.com/errata/RHSA-2026:81532
Comment 5 Jon Orris 2026-10-12 23:13:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:81613 https://access.redhat.com/errata/RHSA-2026:81613
Comment 6 Jon Orris 2026-10-14 09:33:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:82845 https://access.redhat.com/errata/RHSA-2026:82845
Comment 7 Jon Orris 2026-10-14 13:54:56 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:82876 https://access.redhat.com/errata/RHSA-2026:82876
Comment 8 Jon Orris 2026-10-14 15:05:28 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:82875 https://access.redhat.com/errata/RHSA-2026:82875
Comment 13 Jon Orris 2026-10-19 11:14:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:84799 https://access.redhat.com/errata/RHSA-2026:84799
Comment 14 Jon Orris 2026-10-20 21:50:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:86205 https://access.redhat.com/errata/RHSA-2026:86205
Comment 15 Jon Orris 2026-10-20 21:53:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:86206 https://access.redhat.com/errata/RHSA-2026:86206
Note You need to log in before you can comment on or make changes to this bug.