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Fencer Vulns
high 8.2

CVE-2026-86145 json

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 work…

published 2026-09-05 2 mo ago modified 2026-09-09 1 mo ago also EUVD-2026-71836

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

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).

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-2026-86145

  • 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 20.04 LTS 10.34-7ubuntu0.1+esm1

ubuntu advisories UBUNTU-CVE-2026-86145

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

  • mariadb11.8 RHEL 10.2 3:11.8.8-2.el10_2
  • mariadb11.8-pam RHEL 10.2 3:11.8.8-2.el10_2
  • mariadb11.8-test RHEL 10.2 3:11.8.8-2.el10_2
  • mariadb11.8-backup RHEL 10.2 3:11.8.8-2.el10_2
  • mariadb11.8-common RHEL 10.2 3:11.8.8-2.el10_2
  • mariadb11.8-errmsg RHEL 10.2 3:11.8.8-2.el10_2
  • mariadb11.8-server RHEL 10.2 3:11.8.8-2.el10_2
  • mariadb11.8-embedded RHEL 10.2 3:11.8.8-2.el10_2

red hat advisories RHSA-2026:84799RHSA-2026:82875RHSA-2026:82876RHSA-2026:82845RHSA-2026:81613RHSA-2026:81532

  • 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

  • mariadb11.8 AlmaLinux 10 3:11.8.8-2.el10_2.alma.2
  • mariadb11.8-pam AlmaLinux 10 3:11.8.8-2.el10_2.alma.2
  • mariadb11.8-test AlmaLinux 10 3:11.8.8-2.el10_2.alma.2
  • mariadb11.8-backup AlmaLinux 10 3:11.8.8-2.el10_2.alma.2
  • mariadb11.8-common AlmaLinux 10 3:11.8.8-2.el10_2.alma.2
  • mariadb11.8-errmsg AlmaLinux 10 3:11.8.8-2.el10_2.alma.2
  • mariadb11.8-server AlmaLinux 10 3:11.8.8-2.el10_2.alma.2
  • mariadb11.8-embedded AlmaLinux 10 3:11.8.8-2.el10_2.alma.2

almalinux advisories ALSA-2026:84799ALSA-2026:81522ALSA-2026:81532ALSA-2026:81613

  • mariadb11.8 Rocky Linux 10 3:11.8.8-2.el10_2
  • 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-2026:84799RLSA-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-2026-86145

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

azure linux advisories AZL-99726

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

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-2026-86145 updated cvss 8.2

pcre2: PCRE2: Out-of-bounds write allows arbitrary code execution via crafted regular expressions

  • Red Hat Enterprise Linux 9 mariadb, mariadb-pam, mariadb-test, mingw32-pcre2, mingw64-pcre2, mariadb-backup, +8 more
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat Enterprise Linux 10 mingw-pcre2, mingw32-pcre2, mingw64-pcre2 Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, no fix available
  • 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 CodeReady Linux Builder EUS (v.9.6) pcre2-tools 10.40-6.el9_6.1
    fixed: vendor fix RHSA-2026:82845
  • 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) mariadb11.8 11.8.8-2.el10_2, pcre2-utf16 10.44-1.5.el10_2, pcre2-utf32 10.44-1.5.el10_2, mariadb11.8-pam 11.8.8-2.el10_2, mariadb11.8-test 11.8.8-2.el10_2, mariadb11.8-backup 11.8.8-2.el10_2, +9 more
    fixed: vendor fix RHSA-2026:84799
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) pcre2-utf16 10.40-2.el9_2.1, pcre2-utf32 10.40-2.el9_2.1
    fixed: vendor fix RHSA-2026:82876
show 30 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) pcre2-utf16 10.40-5.el9_4.1, pcre2-utf32 10.40-5.el9_4.1
    fixed: vendor fix RHSA-2026:82875
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) pcre2-utf16 10.44-1.4.el10_0, pcre2-utf32 10.44-1.4.el10_0
    fixed: vendor fix RHSA-2026:86205
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) pcre2-utf16 10.40-6.el9_6.1, pcre2-utf32 10.40-6.el9_6.1
    fixed: vendor fix RHSA-2026:82845
  • 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
  • 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 BaseOS AUS (v.8.4) pcre2 10.32-2.el8_4.1, pcre2-utf16 10.32-2.el8_4.1, pcre2-utf32 10.32-2.el8_4.1
    fixed: vendor fix RHSA-2026:92901
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) pcre2 10.32-3.el8_6.1, pcre2-utf16 10.32-3.el8_6.1, pcre2-utf32 10.32-3.el8_6.1
    fixed: vendor fix RHSA-2026:92899
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) pcre2 10.32-3.el8_8.2, pcre2-utf16 10.32-3.el8_8.2, pcre2-utf32 10.32-3.el8_8.2
    fixed: vendor fix RHSA-2026:86206
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) pcre2 10.40-2.el9_2.1, pcre2-syntax 10.40-2.el9_2.1
    fixed: vendor fix RHSA-2026:82876
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) pcre2 10.40-5.el9_4.1, pcre2-syntax 10.40-5.el9_4.1
    fixed: vendor fix RHSA-2026:82875
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) pcre2 10.44-1.4.el10_0, pcre2-syntax 10.44-1.4.el10_0
    fixed: vendor fix RHSA-2026:86205
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) pcre2 10.40-6.el9_6.1, pcre2-syntax 10.40-6.el9_6.1
    fixed: vendor fix RHSA-2026:82845
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) pcre2 10.32-2.el8_4.1, pcre2-utf16 10.32-2.el8_4.1, pcre2-utf32 10.32-2.el8_4.1
    fixed: vendor fix RHSA-2026:92901
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) pcre2 10.32-3.el8_6.1, pcre2-utf16 10.32-3.el8_6.1, pcre2-utf32 10.32-3.el8_6.1
    fixed: vendor fix RHSA-2026:92899
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) pcre2 10.32-3.el8_8.2, pcre2-utf16 10.32-3.el8_8.2, pcre2-utf32 10.32-3.el8_8.2
    fixed: vendor fix RHSA-2026:86206
  • 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 CodeReady Linux Builder EUS (v. 10.0) pcre2-tools 10.44-1.4.el10_0
    fixed: vendor fix RHSA-2026:86205
  • 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 OpenShift AI 3.0 rhai/base-image-cpu-rhel9 1793042072, rhai/base-image-cpu-rhel9 1793329709, rhai/base-image-tpu-rhel9 1793041987, rhai/base-image-cuda-rhel9 1793042067, rhai/base-image-cuda-rhel9 1793328358, rhai/base-image-rocm-rhel9 1793041981, +1 more
    fixed: vendor fix RHSA-2026:94459
  • Red Hat OpenShift AI 3.4 rhai/base-image-cpu-rhel9 1793042088, rhai/base-image-tpu-rhel9 1793042006, rhai/base-image-gaudi-rhel9 1793042011, rhai/base-image-spyre-rhel9 1793042074, rhai/base-image-neuron-rhel9 1793042008, rhai/base-image-rocm-6.4-rhel9 1793041995, +4 more
    fixed: vendor fix RHSA-2026:91241
  • Red Hat OpenShift AI 3.5 rhai/base-image-cpu-rhel9 1793042162, rhai/base-image-tpu-rhel9 1793042010, rhai/base-image-gaudi-rhel9 1793042004, rhai/base-image-rubin-rhel9 1793042092, rhai/base-image-spyre-rhel9 1793042114, rhai/base-image-neuron-rhel9 1793042008, +4 more
    fixed: vendor fix RHSA-2026:91204
  • Red Hat OpenShift Container Platform 4.14 rhcos 414.92.202610242240
    fixed: vendor fix RHSA-2026:89838
  • Red Hat OpenShift Container Platform 4.16 rhcos 416.94.202611031928
    fixed: vendor fix RHSA-2026:95229
  • Red Hat OpenShift Container Platform 4.18 rhcos 418.94.202610242013
    fixed: vendor fix RHSA-2026:89725
  • Red Hat OpenShift Container Platform 4.19 rhcos 4.19.9.6.202610241701
    fixed: vendor fix RHSA-2026:89651
  • Red Hat OpenShift Container Platform 4.20 rhcos 4.20.9.6.202610242033
    fixed: vendor fix RHSA-2026:89333
  • Red Hat OpenShift Container Platform 4.21 rhcos 4.21.9.6.202610241345
    fixed: vendor fix RHSA-2026:89232

2 more fixed, 9 more not affected in the full advisory

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
yes
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

Affected products

  • PCRE PCRE2

Classification

Weakness
  • CWE-424 Improper Protection of Alternate Path

References

Sources

Fencer Vulns 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.