CVE-2026-34502: Apache Portable Runtime Utility: Heap buffer overflow in APR memcached client

Patch / fix

fixed in 1 distros 9

bitnami apr-util 1.6.5

debian ubuntu red hat suse opensuse almalinux rocky linux alpine azure linux

apr-util Debian 12 1.6.3-1+deb12u1
apr-util Debian 13 1.6.3-3+deb13u1
apr-util Debian 14 1.6.4-1

debian advisories DEBIAN-CVE-2026-34502

apr-util Ubuntu 22.04 LTS 1.6.1-5ubuntu4.22.04.3
apr-util Ubuntu 24.04 LTS 1.6.3-1.1ubuntu7.1
apr-util Ubuntu 26.04 LTS 1.6.3-3ubuntu3.1
apr-util Ubuntu Pro 14.04 LTS 1.5.3-1ubuntu0.1~esm3
apr-util Ubuntu Pro 18.04 LTS 1.6.1-2ubuntu0.1+esm1
apr-util Ubuntu Pro 20.04 LTS 1.6.1-4ubuntu2.2+esm1

ubuntu advisories UBUNTU-CVE-2026-34502

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

apr-util RHEL 8 1.6.1-9.el8_10.1
apr-util-bdb RHEL 8 1.6.1-9.el8_10.1
apr-util-ldap RHEL 8 1.6.1-9.el8_10.1
apr-util-odbc RHEL 8 1.6.1-9.el8_10.1
apr-util-mysql RHEL 8 1.6.1-9.el8_10.1
apr-util-pgsql RHEL 8 1.6.1-9.el8_10.1
apr-util-sqlite RHEL 8 1.6.1-9.el8_10.1
apr-util-openssl RHEL 8 1.6.1-9.el8_10.1

red hat advisories RHSA-2026:69113 RHSA-2026:66392 RHSA-2026:66341 RHSA-2026:58474

apr-util SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Server Applications 15 SP7 +1 more 1.6.1-150600.27.3.1
apr-util SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 1.6.1-150300.18.8.1
apr-util SLES for SAP applications 16.0, SLES 16.0 1.6.3-160000.3.1
libapr-util1 SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.5.3-8.22.1

suse advisories SUSE-SU-2026:3938-1 SUSE-SU-2026:3937-1 SUSE-SU-2026:3905-1 SUSE-SU-2026:23551-1

apr-util openSUSE Leap 16.0 1.6.3-160000.3.1

opensuse advisories openSUSE-SU-2026:21672-1

apr-util AlmaLinux 8 1.6.1-9.el8_10.1
apr-util-bdb AlmaLinux 8 1.6.1-9.el8_10.1
apr-util-ldap AlmaLinux 8 1.6.1-9.el8_10.1
apr-util-odbc AlmaLinux 8 1.6.1-9.el8_10.1
apr-util-mysql AlmaLinux 8 1.6.1-9.el8_10.1
apr-util-pgsql AlmaLinux 8 1.6.1-9.el8_10.1
apr-util-sqlite AlmaLinux 8 1.6.1-9.el8_10.1
apr-util-openssl AlmaLinux 8 1.6.1-9.el8_10.1

almalinux advisories ALSA-2026:69113 ALSA-2026:66341 ALSA-2026:66392

apr-util Rocky Linux 8 1.6.1-9.el8_10.1
apr-util Rocky Linux 10 1.6.3-23.el10_2.1
apr-util Rocky Linux 9 1.6.1-23.el9_8.1

rocky linux advisories RLSA-2026:69113 RLSA-2026:66392 RLSA-2026:66341

apr-util Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 1.6.4-r0

alpine advisories ALPINE-CVE-2026-34502

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

apr-util Azure Linux 3.0 1.6.3-3

azure linux advisories AZL-94637

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-2026-34502 updated 2026-11-07 cvss 7.5

apr-util: Apache Portable Runtime Utility: Heap buffer overflow in APR memcached client

Red Hat Enterprise Linux 6 apr-util, apr-util-ldap, apr-util-odbc, apr-util-mysql, apr-util-pgsql, apr-util-sqlite
affected: workaround, no fix planned “Out of support scope”
Red Hat Enterprise Linux 7 apr-util, apr-util-nss, apr-util-ldap, apr-util-odbc, apr-util-mysql, apr-util-pgsql, +2 more
affected: workaround, no fix available
Red Hat Enterprise Linux AppStream (v. 8) apr-util 1.6.1-9.el8_10.1, apr-util-bdb 1.6.1-9.el8_10.1, apr-util-ldap 1.6.1-9.el8_10.1, apr-util-odbc 1.6.1-9.el8_10.1, apr-util-mysql 1.6.1-9.el8_10.1, apr-util-pgsql 1.6.1-9.el8_10.1, +2 more
fixed: vendor fix RHSA-2026:69113
Red Hat Enterprise Linux AppStream (v. 9) apr-util 1.6.1-23.el9_8.1, apr-util-bdb 1.6.1-23.el9_8.1, apr-util-ldap 1.6.1-23.el9_8.1, apr-util-odbc 1.6.1-23.el9_8.1, apr-util-mysql 1.6.1-23.el9_8.1, apr-util-pgsql 1.6.1-23.el9_8.1, +2 more
fixed: vendor fix RHSA-2026:66341
Red Hat Enterprise Linux AppStream (v. 10) apr-util 1.6.3-23.el10_2.1, apr-util-ldap 1.6.3-23.el10_2.1, apr-util-lmdb 1.6.3-23.el10_2.1, apr-util-odbc 1.6.3-23.el10_2.1, apr-util-mysql 1.6.3-23.el10_2.1, apr-util-pgsql 1.6.3-23.el10_2.1, +2 more
fixed: vendor fix RHSA-2026:66392
Red Hat Hardened Images apr-util 1.6.5-1.hum1, apr-util-ldap 1.6.5-1.hum1, apr-util-lmdb 1.6.5-1.hum1, apr-util-odbc 1.6.5-1.hum1, apr-util-mysql 1.6.5-1.hum1, apr-util-pgsql 1.6.5-1.hum1, +2 more
fixed: vendor fix RHSA-2026:58474

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: 3 mo ago (2026-08-06)

Exploit prediction

0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
bitnami	apr-util	>=1.3.0, <1.6.5	1.6.5

Affected products

Apache Software Foundation Apache Portable Runtime Utility

Classification

Weakness

CWE-122 Heap-based Buffer Overflow

References

lists.apache.org /thread/spk5643m4vq0mb8h5b9hz9gkp57ombl8
vendor-advisory, mailing-list, advisory
openwall.com /lists/oss-security/2026/08/06/12
mailing-list, third-party-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2026-34502
web

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.

Summary