Skip to content
Fencer Intel
medium 6.5

CVE-2026-89158 json

PCRE2: integer overflow in pcre2_compile_32() causes out-of-bounds write on 32-bit systems

published 2mo ago modified last mo. also EUVD-2026-75944 , GHSA-fmgr-6ggq-9859

Unreviewed: the maintainers' own advisory

Published by the maintainers on their GitHub repository PCRE2Project/pcre2. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 16%
public exploits
0
none known

Summary

PCRE2 before 10.48, on 32-bit platforms, has a pcre2_compile_32 integer overflow and resultant out-of-bounds write.

Patch / fix

  • PCRE PCRE2 10.48
  • pcre2 Debian 12 10.42-1+deb12u1
  • pcre2 Debian 13 10.46-1~deb13u2
  • pcre2 Debian 14 10.48-1

debian advisories DEBIAN-CVE-2026-89158

  • pcre2 Ubuntu 22.04 LTS 10.39-3ubuntu0.2
  • pcre2 Ubuntu 24.04 LTS 10.42-4ubuntu2.2
  • pcre2 Ubuntu 26.10 10.46-1ubuntu1
  • pcre2 Ubuntu 26.04 LTS 10.46-1ubuntu0.1
  • pcre2 Ubuntu Pro 16.04 LTS 10.21-1ubuntu0.1~esm1
  • pcre2 Ubuntu Pro 18.04 LTS 10.31-2ubuntu0.1~esm2
  • pcre2 Ubuntu Pro 20.04 LTS 10.34-7ubuntu0.1+esm1

ubuntu advisories UBUNTU-CVE-2026-89158

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • pcre2 RHEL 8 10.32-4.el8_10
  • pcre2-tools RHEL 8 10.32-4.el8_10
  • pcre2-utf16 RHEL 8 10.32-4.el8_10
  • pcre2-utf32 RHEL 8 10.32-4.el8_10
  • pcre2 RHEL 9 10.40-7.el9_8
  • pcre2-tools RHEL 9 10.40-7.el9_8
  • pcre2-utf16 RHEL 9 10.40-7.el9_8
  • pcre2-utf32 RHEL 9 10.40-7.el9_8

red hat advisories RHSA-2026:81613RHSA-2026:81532RHSA-2026:81522RHSA-2026:67534

  • pcre2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +8 more 10.39-150400.4.12.1
  • pcre2 SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 10.45-160000.4.1
  • pcre2 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Basesystem 15 SP7 10.42-150600.3.3.1
  • pcre2 Linux Micro 6.1 10.42-slfo.1.1_2.1
  • pcre2 Linux Micro 6.0 10.42-3.1
  • pcre2 SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 10.34-1.16.1

suse advisories SUSE-SU-2026:4458-1SUSE-SU-2026:23891-1SUSE-SU-2026:23906-1SUSE-SU-2026:4241-1SUSE-SU-2026:4201-1SUSE-SU-2026:23740-1

  • pcre2 openSUSE Leap 16.0 10.45-160000.4.1

opensuse advisories openSUSE-SU-2026:21938-1

  • pcre2 AlmaLinux 10 10.44-1.5.el10_2
  • pcre2-tools AlmaLinux 10 10.44-1.5.el10_2
  • pcre2-utf16 AlmaLinux 10 10.44-1.5.el10_2
  • pcre2-utf32 AlmaLinux 10 10.44-1.5.el10_2
  • pcre2-syntax AlmaLinux 10 10.44-1.5.el10_2
  • pcre2 AlmaLinux 9 10.40-7.el9_8
  • pcre2-tools AlmaLinux 9 10.40-7.el9_8
  • pcre2-utf16 AlmaLinux 9 10.40-7.el9_8

almalinux advisories ALSA-2026:81522ALSA-2026:81532ALSA-2026:81613

  • pcre2 Rocky Linux 10 10.44-1.5.el10_2
  • pcre2 Rocky Linux 9 10.40-7.el9_8
  • pcre2 Rocky Linux 8 10.32-4.el8_10

rocky linux advisories RLSA-2026:81522RLSA-2026:81532RLSA-2026:81613

  • pcre2 Alpine 3.21 10.43-r1
  • pcre2 Alpine 3.22 10.46-r1
  • pcre2 Alpine 3.24, Alpine 3.23 10.48-r0

alpine advisories ALPINE-CVE-2026-89158

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • pcre2 Azure Linux 3.0 10.48-1
  • rust Azure Linux 3.0 1.96.0-1

azure linux advisories AZL-100062AZL-101814

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Is CVE-2026-89158 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-89158 updated cvss 6.5

PCRE2: PCRE2: Out-of-bounds write via integer overflow on 32-bit platforms

  • Red Hat Enterprise Linux 7 pcre2, pcre2-tools, pcre2-utf16, pcre2-utf32 Red Hat Enterprise Linux 8 Judy, galera, mariadb, mariadb-pam, mariadb-test, mariadb-backup, +8 more Red Hat Enterprise Linux 9 bootc, mariadb, mariadb-pam, mariadb-test, mingw32-pcre2, mingw64-pcre2, +10 more Red Hat Enterprise Linux 10 bootc, mariadb11.8, mingw-pcre2, mariadb10.11, mingw32-pcre2, mingw64-pcre2 Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-dashboard-rhel9
    under investigation
  • Red Hat Cost Management 4 costmanagement/costmanagement-metrics-rhel9-operator 1793202662
    fixed: vendor fix RHSA-2026:95264
  • Red Hat Cost Management On-Premise 1 costmanagement/costmanagement-ui-rhel10 1792605272
    fixed: vendor fix RHSA-2026:87400
  • Red Hat Enterprise Linux AppStream (v. 9) pcre2-utf16 10.40-7.el9_8, pcre2-utf32 10.40-7.el9_8
    fixed: vendor fix RHSA-2026:81532
  • Red Hat Enterprise Linux AppStream (v. 10) pcre2-utf16 10.44-1.5.el10_2, pcre2-utf32 10.44-1.5.el10_2
    fixed: vendor fix RHSA-2026:81522
  • Red Hat Enterprise Linux BaseOS (v. 8) pcre2 10.32-4.el8_10, pcre2-utf16 10.32-4.el8_10, pcre2-utf32 10.32-4.el8_10
    fixed: vendor fix RHSA-2026:81613
  • Red Hat Enterprise Linux BaseOS (v. 9) pcre2 10.40-7.el9_8, pcre2-syntax 10.40-7.el9_8
    fixed: vendor fix RHSA-2026:81532
show 9 more
  • Red Hat Enterprise Linux BaseOS (v. 10) pcre2 10.44-1.5.el10_2, pcre2-syntax 10.44-1.5.el10_2
    fixed: vendor fix RHSA-2026:81522
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) pcre2-tools 10.40-7.el9_8
    fixed: vendor fix RHSA-2026:81532
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) pcre2-tools 10.44-1.5.el10_2
    fixed: vendor fix RHSA-2026:81522
  • Red Hat Enterprise Linux CRB (v. 8) pcre2-tools 10.32-4.el8_10
    fixed: vendor fix RHSA-2026:81613
  • Red Hat Hardened Images pcre2 10.48-0.1.hum1, pcre2-tools 10.48-0.1.hum1, pcre2-utf16 10.48-0.1.hum1, pcre2-utf32 10.48-0.1.hum1, pcre2-syntax 10.48-0.1.hum1
    fixed: vendor fix RHSA-2026:67534
  • Red Hat Update Infrastructure 5 rhui5/cds-rhel9 1791978528, rhui5/rhua-rhel9 1791978693, rhui5/haproxy-rhel9 1791978528, rhui5/installer-rhel9 1791964013, rhui5/cds-kubernetes-rhel9 1791978534
    fixed: vendor fix RHSA-2026:82939
  • Red Hat Cost Management 4 costmanagement/costmanagement-metrics-operator-bundle 1793205914
    not affected: vulnerable code not present
  • Red Hat Hardened Images rust
    not affected: component not present
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-kserve-controller-rhel9, rhoai/odh-model-serving-api-rhel9, rhoai/odh-workbenches-operator-rhel9, rhoai/odh-llama-stack-k8s-operator-rhel9, rhoai/odh-kserve-llmisvc-controller-rhel9
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2mo ago

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L

Affected products

  • PCRE PCRE2

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of PCRE2Project/pcre2 published their own advisory on GitHub. Reviewed sources take precedence over it.