Heap-based buffer overflow in Apache APR-util - CVE-2026-34501

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU144929

Heap-based buffer overflow in Apache APR-util - CVE-2026-34501

Published: August 24, 2026


Vulnerability identifier: #VU144929
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-34501
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to heap-based buffer overflow in the APR redis client when parsing redis server responses. A remote attacker can send specially crafted response data to execute arbitrary code.


Affected software

Apache APR-util
Debian Linux
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Ubuntu
Server Applications Module
Basesystem Module
openSUSE Leap
openEuler
apr-util (Ubuntu package)
apr-util-devel
apr-util
apr-util-pgsql
apr-util-odbc
apr-util-debugsource
apr-util-debuginfo
apr-util (Red Hat package)
libapr-util1-dbd-sqlite3
libapr-util1-dbd-pgsql
libapr-util1-dbd-mysql
libapr-util1-dbd-pgsql-debuginfo
libapr-util1-dbm-db-debuginfo
libapr-util1-dbd-sqlite3-debuginfo
libapr-util1-dbd-mysql-debuginfo
libapr-util1-debuginfo
libapr-util1-dbm-db
libapr-util1
apr-util (Debian package)

How to mitigate CVE-2026-34501

Install security update from vendor's website.

Apache APR-util - update to 1.6.4
apr-util (Ubuntu package) - addressed in versions 1.5.3-1ubuntu0.1~esm3, 1.5.4-1ubuntu0.1~esm1, 1.6.1-2ubuntu0.1+esm1, 1.6.1-4ubuntu2.2+esm1, 1.6.1-5ubuntu4.22.04.3, 1.6.3-1.1ubuntu7.1, 1.6.3-3ubuntu3.1
apr-util-devel - addressed in versions 1.6.1-16, 1.6.4-1, 1.6.5-1
apr-util - addressed in versions 1.6.1-16, 1.6.4-1, 1.6.5-1
apr-util-pgsql - addressed in versions 1.6.1-16, 1.6.4-1, 1.6.5-1
apr-util-odbc - addressed in versions 1.6.1-16, 1.6.4-1, 1.6.5-1
apr-util-debugsource - addressed in versions 1.6.1-16, 1.6.4-1, 1.6.5-1
apr-util-debuginfo - addressed in versions 1.6.1-16, 1.6.4-1, 1.6.5-1
apr-util (Red Hat package) - addressed in versions 1.6.1-23.el9_8.1, 1.6.3-23.el10_2.1
libapr-util1-dbd-sqlite3 - addressed in versions 1.6.1-150300.18.8.1, 1.6.1-150600.27.3.1
libapr-util1-dbd-pgsql - addressed in versions 1.6.1-150300.18.8.1, 1.6.1-150600.27.3.1
libapr-util1-dbd-mysql - addressed in versions 1.6.1-150300.18.8.1, 1.6.1-150600.27.3.1
apr-util-devel - addressed in versions 1.6.1-150300.18.8.1, 1.6.1-150600.27.3.1
libapr-util1-dbd-pgsql-debuginfo - addressed in versions 1.6.1-150300.18.8.1, 1.6.1-150600.27.3.1
libapr-util1-dbm-db-debuginfo - addressed in versions 1.6.1-150300.18.8.1, 1.6.1-150600.27.3.1
libapr-util1-dbd-sqlite3-debuginfo - addressed in versions 1.6.1-150300.18.8.1, 1.6.1-150600.27.3.1
libapr-util1-dbd-mysql-debuginfo - addressed in versions 1.6.1-150300.18.8.1, 1.6.1-150600.27.3.1
apr-util-debuginfo - addressed in versions 1.6.1-150300.18.8.1, 1.6.1-150600.27.3.1
apr-util-debugsource - addressed in versions 1.6.1-150300.18.8.1, 1.6.1-150600.27.3.1
libapr-util1-debuginfo - addressed in versions 1.6.1-150300.18.8.1, 1.6.1-150600.27.3.1
libapr-util1-dbm-db - addressed in versions 1.6.1-150300.18.8.1, 1.6.1-150600.27.3.1
libapr-util1 - addressed in versions 1.6.1-150300.18.8.1, 1.6.1-150600.27.3.1
apr-util (Debian package) - update to 1.6.3-3+deb13u1

External References

Related Security Bulletins