Uncontrolled recursion in expr - CVE-2025-68156

Vulnerability identifier: #VU120232

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-68156

CWE-ID: CWE-674

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to uncontrolled recursion within the flatten, min, max, mean, and median function. A remote attacker can pass specially crafted input to the application and perform a denial of service attack. 

expr
watsonx.data
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Micro
SUSE Multi-Linux Manager Client Tools for SLE Micro
SUSE Manager Client Tools for SLE Micro
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
SUSE Multi-Linux Manager Client Tools for SLE
SUSE Manager Client Tools for SLE
SUSE Linux Enterprise Server for SAP Applications
SUSE Linux Enterprise Desktop
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Server
Basesystem Module
SUSE Package Hub 15
openSUSE Leap
Red Hat OpenShift GitOps
Splunk Enterprise
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
mgrctl
mgrctl-lang
mgrctl-debuginfo
mgrctl-zsh-completion
mgrctl-bash-completion
firewalld-prometheus-config
golang-github-QubitProducts-exporter_exporter
golang-github-prometheus-promu-debuginfo
golang-github-prometheus-promu
prometheus-blackbox_exporter-debuginfo
prometheus-blackbox_exporter
golang-github-prometheus-alertmanager-debuginfo
golang-github-prometheus-alertmanager
opentelemetry-collector (Red Hat package)
golang-github-lusitaniae-apache_exporter
golang-github-lusitaniae-apache_exporter-debuginfo
dracut-saltboot
golang-github-prometheus-node_exporter
golang-github-prometheus-node_exporter-debuginfo
alloy-debuginfo
alloy
golang-github-boynux-squid_exporter
golang-github-boynux-squid_exporter-debuginfo
golang-github-prometheus-prometheus
golang-github-prometheus-prometheus-debuginfo
spacecmd
python2-rhnlib
python3-rhnlib
python2-uyuni-common-libs
mgr-push
python2-mgr-push
supportutils-plugin-susemanager-client
python3-uyuni-common-libs
python3-mgr-push
spacewalk-client-tools
python2-spacewalk-client-tools
python3-spacewalk-client-tools
grafana-debuginfo
grafana

Install updates from vendor's website.

expr - update to 1.17.7
Red Hat OpenShift GitOps - addressed in versions 1.17.4, 1.18.3
watsonx.data - update to 2.3.1
Splunk Enterprise - addressed in versions 9.3.12, 9.4.11, 10.0.6, 10.2.3
mgrctl - addressed in versions 0.1.38-150000.1.30.1, 5.1.24-120002.3.9.1, 5.1.24-150002.3.9.1
mgrctl-lang - addressed in versions 0.1.38-150000.1.30.1, 5.1.24-120002.3.9.1, 5.1.24-150002.3.9.1
mgrctl-debuginfo - addressed in versions 0.1.38-150000.1.30.1, 5.1.24-150002.3.9.1
mgrctl-zsh-completion - addressed in versions 0.1.38-150000.1.30.1, 5.1.24-120002.3.9.1, 5.1.24-150002.3.9.1
mgrctl-bash-completion - addressed in versions 0.1.38-150000.1.30.1, 5.1.24-120002.3.9.1, 5.1.24-150002.3.9.1
firewalld-prometheus-config - addressed in versions 0.1-150000.3.67.1, 0.1-150002.3.3.1
golang-github-QubitProducts-exporter_exporter - addressed in versions 0.4.0-120002.3.3.1, 0.4.0-150000.1.21.1, 0.4.0-150002.3.3.1
golang-github-prometheus-promu-debuginfo - update to 0.17.0-150000.3.30.1
golang-github-prometheus-promu - update to 0.17.0-150000.3.30.1
prometheus-blackbox_exporter-debuginfo - update to 0.26.0-120002.3.3.1
prometheus-blackbox_exporter - addressed in versions 0.26.0-120002.3.3.1, 0.26.0-150000.1.30.2, 0.26.0-150002.3.3.1
golang-github-prometheus-alertmanager-debuginfo - addressed in versions 0.28.1-120002.4.6.1, 0.28.1-150002.4.6.1
golang-github-prometheus-alertmanager - addressed in versions 0.28.1-120002.4.6.1, 0.28.1-150002.4.6.1
opentelemetry-collector (Red Hat package) - addressed in versions 0.135.0-2.el9_4, 0.135.0-2.el9_6, 0.135.0-2.el9_7, 0.135.0-2.el10_0, 0.135.0-2.el10_1
golang-github-lusitaniae-apache_exporter - addressed in versions 1.0.10-120002.3.3.1, 1.0.10-150000.1.26.1, 1.0.10-150002.3.3.1
golang-github-lusitaniae-apache_exporter-debuginfo - addressed in versions 1.0.10-120002.3.3.1, 1.0.10-150000.1.26.1, 1.0.10-150002.3.3.1
dracut-saltboot - addressed in versions 1.1.0-150000.1.65.1, 1.1.0-150002.3.6.1
golang-github-prometheus-node_exporter - addressed in versions 1.9.1-120002.3.3.1, 1.9.1-150002.3.3.1
golang-github-prometheus-node_exporter-debuginfo - addressed in versions 1.9.1-120002.3.3.1, 1.9.1-150002.3.3.1
alloy-debuginfo - update to 1.12.2-150700.15.15.1
alloy - update to 1.12.2-150700.15.15.1
golang-github-boynux-squid_exporter - addressed in versions 1.13.0-120002.3.3.1, 1.13.0-150000.1.12.1, 1.13.0-150002.3.3.1
golang-github-boynux-squid_exporter-debuginfo - addressed in versions 1.13.0-120002.3.3.1, 1.13.0-150000.1.12.1, 1.13.0-150002.3.3.1
golang-github-prometheus-prometheus - addressed in versions 3.5.0-120002.3.3.1, 3.5.0-150000.3.67.1, 3.5.0-150002.3.3.1
golang-github-prometheus-prometheus-debuginfo - addressed in versions 3.5.0-120002.3.3.1, 3.5.0-150002.3.3.1
spacecmd - addressed in versions 5.0.15-150000.3.142.1, 5.1.12-120002.3.6.1, 5.1.12-150002.3.6.1
python2-rhnlib - update to 5.1.4-120002.3.6.1
python3-rhnlib - update to 5.1.4-150002.3.6.1
python2-uyuni-common-libs - update to 5.1.5-120002.3.3.1
mgr-push - addressed in versions 5.1.5-120002.3.6.1, 5.1.5-150002.3.6.2
python2-mgr-push - update to 5.1.5-120002.3.6.1
supportutils-plugin-susemanager-client - addressed in versions 5.1.5-120002.3.6.1, 5.1.5-150002.3.6.1
python3-uyuni-common-libs - update to 5.1.5-150002.3.3.1
python3-mgr-push - update to 5.1.5-150002.3.6.2
spacewalk-client-tools - addressed in versions 5.1.8-120002.3.6.1, 5.1.8-150002.3.6.1
python2-spacewalk-client-tools - update to 5.1.8-120002.3.6.1
python3-spacewalk-client-tools - update to 5.1.8-150002.3.6.1
grafana-debuginfo - addressed in versions 11.5.10-120002.4.9.1, 11.5.10-150002.4.9.1, 11.6.11-150000.1.90.1, 11.6.11-150200.3.83.1
grafana - addressed in versions 11.5.10-120002.4.9.1, 11.5.10-150002.4.9.1, 11.6.11-150000.1.90.1, 11.6.11-150200.3.83.1

• https://github.com/expr-lang/expr/security/advisories/GHSA-cfpf-hrx2-8rv6

• Remote denial of service in Expr
• Red Hat Enterprise Linux 10 update for opentelemetry-collector
• Red Hat Enterprise Linux 9 update for opentelemetry-collector
• Red Hat Enterprise Linux 9 update for opentelemetry-collector
• Red Hat Enterprise Linux 9 update for opentelemetry-collector
• Red Hat Enterprise Linux 10 update for opentelemetry-collector
• SUSE update for alloy
• Multiple vulnerabilities in Red Hat OpenShift GitOps v1.18
• Multiple vulnerabilities in Red Hat OpenShift GitOps 1.17
• SUSE update for Security update 5.1.2 for Multi-Linux Manager Client Tools
• SUSE update for Security update 5.1.2 for Multi-Linux Manager Client Tools
• SUSE update for grafana
• SUSE update for Security update 5.0.7 for Multi-Linux Manager Client Tools
• IBM watsonx.data update for Expr
• Splunk Enterprise update for third-party components (May 2026)