Description
XML::Parser versions through 2.47 for Perl has an off-by-one heap buffer overflow in st_serial_stack.
In the case (stackptr == stacksize - 1), the stack will NOT be expanded. Then the new value will be written at location (++stackptr), which equals stacksize and therefore falls just outside the allocated buffer.
The bug can be observed when parsing an XML file with very deep element nesting
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| TODDR | XML::Parser | ≤ 2.47 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libxml-parser-perl | 2.47-2 | — |
| Debian 13 | libxml-parser-perl | 2.47-2~deb13u1 | DSA-6182-1 |
| Debian 12 | libxml-parser-perl | 2.46-4+deb12u1 | DSA-6182-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | libxml-parser-perl | 2.47-1ubuntu0.25.10.1 | — |
| Ubuntu 24.04 LTS | libxml-parser-perl | 2.47-1ubuntu0.24.04.1 | — |
| Ubuntu 22.04 LTS | libxml-parser-perl | 2.46-3ubuntu0.1 | — |
| Ubuntu 20.04 LTS | libxml-parser-perl | No fix yet | — |
| Ubuntu 18.04 LTS | libxml-parser-perl | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | libxml-parser-perl | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | perl-XML-Parser | 2.47-6.1.el10_1 | RHSA-2026:7680 |
| RHEL 9 | perl-XML-Parser | 2.46-9.1.el9_7 | RHSA-2026:7679 |
| RHEL 8 | perl-XML-Parser | 2.44-12.el8_10 | RHSA-2026:7681 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | perl-XML-Parser | 2.47-6.el10_0.1 | RHSA-2026:9110 |
| RHEL 9.6 EUS | perl-XML-Parser | 2.46-9.el9_6.1 | RHSA-2026:9605 |
| RHEL 9.4 EUS | perl-XML-Parser | 2.46-9.el9_4.1 | RHSA-2026:9259 |
| RHEL 9.2 E4S | perl-XML-Parser | 2.46-9.el9_2.1 | RHSA-2026:9258 |
| RHEL 9.0 E4S | perl-XML-Parser | 2.46-9.el9_0.1 | RHSA-2026:9246 |
| RHEL 8.8 TUS | perl-XML-Parser | 2.44-11.el8_8.1 | RHSA-2026:8577 |
| RHEL 8.8 E4S | perl-XML-Parser | 2.44-11.el8_8.1 | RHSA-2026:8577 |
| RHEL 8.6 TUS | perl-XML-Parser | 2.44-11.el8_6.1 | RHSA-2026:8610 |
| RHEL 8.6 E4S | perl-XML-Parser | 2.44-11.el8_6.1 | RHSA-2026:8610 |
| RHEL 8.6 AUS | perl-XML-Parser | 2.44-11.el8_6.1 | RHSA-2026:8610 |
| RHEL 8.4 EUS Long Life | perl-XML-Parser | 2.44-11.el8_4.1 | RHSA-2026:8608 |
| RHEL 8.4 AUS | perl-XML-Parser | 2.44-11.el8_4.1 | RHSA-2026:8608 |
| RHEL 8.2 AUS | perl-XML-Parser | 2.44-11.el8_2.1 | RHSA-2026:8609 |
| RHEL 7 ELS | perl-XML-Parser | 2.41-10.el7_9.1 | RHSA-2026:8578 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | perl-XML-Parser | 2.47-6.1.el10_1 | ALSA-2026:7680 |
| AlmaLinux 9 | perl-XML-Parser | 2.46-9.1.el9_7 | ALSA-2026:7679 |
| AlmaLinux 8 | perl-XML-Parser | 2.44-12.el8_10 | ALSA-2026:7681 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | perl-XML-Parser | 2.47-6.1.el10_1 | RLSA-2026:7680 |
| Rocky Linux 9 | perl-XML-Parser | 2.46-9.1.el9_7 | RLSA-2026:7679 |
| Rocky Linux 8 | perl-XML-Parser | 2.44-12.el8_10 | RLSA-2026:7681 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | perl-XML-Parser | 2.44-150000.3.3.1 | SUSE-SU-2026:1153-1 |
| SLES 15 SP6 | perl-XML-Parser | 2.44-150000.3.3.1 | SUSE-SU-2026:1153-1 |
| SLES 15 SP5 | perl-XML-Parser | 2.44-150000.3.3.1 | SUSE-SU-2026:1153-1 |
| SLES 15 SP4 | perl-XML-Parser | 2.44-150000.3.3.1 | SUSE-SU-2026:1153-1 |
| SLES 12 SP5 | perl-XML-Parser | 2.41-23.3.1 | SUSE-SU-2026:1152-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | perl-XML-Parser | 2.470.0-160000.3.1 | SUSE-SU-2026:20993-1 |
| SLES for SAP 15 SP6 | perl-XML-Parser | 2.44-150000.3.3.1 | SUSE-SU-2026:1153-1 |
| SLES for SAP 15 SP5 | perl-XML-Parser | 2.44-150000.3.3.1 | SUSE-SU-2026:1153-1 |
| SLES for SAP 15 SP4 | perl-XML-Parser | 2.44-150000.3.3.1 | SUSE-SU-2026:1153-1 |
| SLES 16.0 | perl-XML-Parser | 2.470.0-160000.3.1 | SUSE-SU-2026:20993-1 |
| SLE HPC 15 SP5 | perl-XML-Parser | 2.44-150000.3.3.1 | SUSE-SU-2026:1153-1 |
| SLE HPC 15 SP4 | perl-XML-Parser | 2.44-150000.3.3.1 | SUSE-SU-2026:1153-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | perl-XML-Parser | 2.570.0-1.1 | openSUSE-SU-2026:10527-1 |
| openSUSE Leap 16.0 | perl-XML-Parser | 2.470.0-160000.3.1 | openSUSE-SU-2026:20459-1 |
| openSUSE Leap 15.6 | perl-XML-Parser | 2.44-150000.3.3.1 | SUSE-SU-2026:1153-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | perl-XML-Parser +1 | 2.51-1.amzn2023.0.1 | ALAS2023-2026-1536 |
| Amazon Linux 2 | perl-XML-Parser | 2.41-10.amzn2.0.3 | ALAS2-2026-3230 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | perl-XML-Parser | 2.47-2 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | perl-XML-Parser | 2.47-6.1.0.1.el10_1 | ELSA-2026-7680 |
| Oracle Linux 9 | perl-XML-Parser | 2.46-9.1.0.1.el9_7 | ELSA-2026-7679 |
| Oracle Linux 8 | perl-XML-Parser | 2.44-12.0.1.el8_10 | ELSA-2026-7681 |
| Oracle Linux 7 | perl-XML-Parser | 2.41-10.0.3.el7_9 | ELSA-2026-8578 |
Advisories 33
- ALSA-2026:7680 Important: perl-XML-Parser security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:7679 Important: perl-XML-Parser security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:7681 Important: perl-XML-Parser security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2026-1666 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 28, 2026
- RHSA-2026:9605 Red Hat Security Advisory: perl-XML-Parser security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:9259 Red Hat Security Advisory: perl-XML-Parser security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:9258 Red Hat Security Advisory: perl-XML-Parser security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:9246 Red Hat Security Advisory: perl-XML-Parser security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:9110 Red Hat Security Advisory: perl-XML-Parser security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:8610 Red Hat Security Advisory: perl-XML-Parser security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:8609 Red Hat Security Advisory: perl-XML-Parser security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:8608 Red Hat Security Advisory: perl-XML-Parser security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:8577 Red Hat Security Advisory: perl-XML-Parser security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:8578 Red Hat Security Advisory: perl-XML-Parser security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:7681 Red Hat Security Advisory: perl-XML-Parser security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:7680 Red Hat Security Advisory: perl-XML-Parser security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:7679 Red Hat Security Advisory: perl-XML-Parser security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- WID-SEC-2026-1055 Red Hat Enterprise Linux (perl-xml-parser): Mehrere Schwachstellen BSI CERT-Bund (WID) · May 21, 2026
- ELSA-2026-8578 Important: perl-XML-Parser security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 5, 2026
- RLSA-2026:7680 Important: perl-XML-Parser security update Rocky Linux Security Advisories · Apr 15, 2026
- RLSA-2026:7679 Important: perl-XML-Parser security update Rocky Linux Security Advisories · Apr 15, 2026
- RLSA-2026:7681 Important: perl-XML-Parser security update Rocky Linux Security Advisories · Apr 14, 2026
- ALAS2-2026-3230 Important: perl-XML-Parser security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 13, 2026
- ALAS2023-2026-1536 Important: perl-XML-Parser security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Apr 13, 2026
- ELSA-2026-7681 Important: perl-XML-Parser security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 13, 2026
- ELSA-2026-7680 Important: perl-XML-Parser security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Apr 13, 2026
- ELSA-2026-7679 Important: perl-XML-Parser security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Apr 13, 2026
- openSUSE-SU-2026:10527-1 perl-XML-Parser-2.570.0-1.1 on GA media SUSE / openSUSE Security Updates · Apr 11, 2026
- SUSE-SU-2026:20993-1 Security update for perl-XML-Parser SUSE / openSUSE Security Updates · Apr 10, 2026
- openSUSE-SU-2026:20459-1 Security update for perl-XML-Parser SUSE / openSUSE Security Updates · Apr 5, 2026
- SUSE-SU-2026:1152-1 Security update for perl-XML-Parser SUSE / openSUSE Security Updates · Apr 1, 2026
- SUSE-SU-2026:1153-1 Security update for perl-XML-Parser SUSE / openSUSE Security Updates · Apr 1, 2026
- DSA-6182-1 libxml-parser-perl - security update Debian Security (DSA / DLA) · Mar 28, 2026