Skip to content
Fencer Vulns
high 7.6

CVE-2026-103111 json

PCRE2 before 10.49, when there is an attacker-controlled regular expression and certain JIT API usage, allows an out-of-bounds write with a…

published 2026-09-30 40 d ago modified 2026-10-04 36 d ago also EUVD-2026-89608

cvss
7.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 19%
public exploits
0
none known

Summary

PCRE2 before 10.49, when there is an attacker-controlled regular expression and certain JIT API usage, allows an out-of-bounds write with arbitrary data.

Patch / fix

  • PCRE PCRE2 10.49
  • pcre2 Debian 12 10.42-1+deb12u2
  • pcre2 Debian 13 10.46-1~deb13u3
  • pcre2 Debian 14 10.48-3.1

debian advisories DEBIAN-CVE-2026-103111

  • 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 18.04 LTS 10.31-2ubuntu0.1~esm2
  • pcre2 Ubuntu Pro 20.04 LTS 10.34-7ubuntu0.1+esm1

ubuntu advisories UBUNTU-CVE-2026-103111

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 openSUSE Tumbleweed 10.49-2.1

opensuse advisories openSUSE-SU-2026:12158-1

  • 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 10.49-r0

alpine advisories ALPINE-CVE-2026-103111

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

  • rust Azure Linux 3.0 1.75.0-30

azure linux advisories AZL-105834

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-2026-103111 updated cvss 7.6

pcre2: pcre2: Out-of-bounds write via crafted regular expression

  • Red Hat Enterprise Linux 9 mariadb, mariadb-pam, mariadb-test, mingw32-pcre2, mingw64-pcre2, mariadb-backup, +8 more Red Hat Enterprise Linux 10 mingw32-pcre2, mingw64-pcre2, mingw-pcre2 10.42-8.el10, mariadb10.11 10.11.18-1.el10_2 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 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) 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 28 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 Enterprise Linux Server (v. 7 ELS) pcre2 10.23-3.el7_9, pcre2-utf16 10.23-3.el7_9 Red Hat Enterprise Linux Server Optional (v. 7 ELS) pcre2-tools 10.23-3.el7_9, pcre2-utf32 10.23-3.el7_9
    fixed: vendor fix RHSA-2026:95371
  • Red Hat Hardened Images pcre2 10.49-0.1.hum1, pcre2-tools 10.49-0.1.hum1, pcre2-utf16 10.49-0.1.hum1, pcre2-utf32 10.49-0.1.hum1, pcre2-syntax 10.49-0.1.hum1
    fixed: vendor fix RHSA-2026:74972
  • 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

5 more fixed, 5 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
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
39 d ago

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/PCRE2Project/pcre2/security/advisories/GHSA-r9hj-j2rw-4q3m referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.6 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

Affected products

  • PCRE PCRE2

Classification

Weakness

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.