Description
In xsltCopyText in transform.c in libxslt 1.1.33, a pointer variable isn't reset under certain circumstances. If the relevant memory area happened to be freed and reused in a certain way, a bounds check could fail and memory outside a buffer could be written to, or uninitialized data could be disclosed.
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 | libxslt | 1.1.32-2.2 | — |
| Debian 13 | libxslt | 1.1.32-2.2 | — |
| Debian 12 | libxslt | 1.1.32-2.2 | — |
| Debian 8 | libxslt | 1.1.28-2+deb8u6 | DLA-1973-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libxslt | 1.1.29-5ubuntu0.2 | USN-4164-1 |
| Ubuntu 16.04 LTS | libxslt | 1.1.28-2.1ubuntu0.3 | USN-4164-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | libxslt | 1.1.28-2ubuntu0.2+esm1 | USN-4164-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | libxslt +1 | 1.1.32-5.el8 | RHSA-2020:4464 |
| RHEL 7 | libxslt +2 | 1.1.28-6.el7 | RHSA-2020:4005 |
| RHEL 6 | chromium-browser | 80.0.3987.87-1.el6_10 | RHSA-2020:0514 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | libxslt | 1.1.32-3.8.24 | SUSE-SU-2020:1409-1 |
| SLES 12 SP5 | libxslt | 1.1.28-17.9.1 | SUSE-SU-2020:0920-1 |
| SLES 12 SP4 | libxslt | 1.1.28-17.9.1 | SUSE-SU-2020:0920-1 |
| SLES 12 SP3 | libxslt | 1.1.28-17.9.1 | SUSE-SU-2020:0920-2 |
| SLES 12 SP2 | libxslt | 1.1.28-17.9.1 | SUSE-SU-2020:0920-2 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | libxslt | 1.1.28-17.9.1 | SUSE-SU-2020:0920-1 |
| SLES for SAP 12 SP4 | libxslt | 1.1.28-17.9.1 | SUSE-SU-2020:0920-1 |
| SLES for SAP 12 SP3 | libxslt | 1.1.28-17.9.1 | SUSE-SU-2020:0920-2 |
| SLES for SAP 12 SP2 | libxslt | 1.1.28-17.9.1 | SUSE-SU-2020:0920-2 |
| SUSE Package Hub 15 SP1 | chromium | 80.0.3987.87-bp151.3.59.1 | openSUSE-SU-2020:0210-1 |
| SUSE Package Hub 12 SP3 | chromium | 80.0.3987.87-31.1 | openSUSE-SU-2020:0233-1 |
| SUSE Package Hub 12 SP3 | re2 | 20200101-25.1 | openSUSE-SU-2020:0233-1 |
| SUSE Package Hub 12 | chromium | 80.0.3987.87-31.1 | openSUSE-SU-2020:0233-1 |
| SUSE Package Hub 12 | re2 | 20200101-25.1 | openSUSE-SU-2020:0233-1 |
| SUSE OpenStack Cloud Crowbar 8 | libxslt | 1.1.28-17.9.1 | SUSE-SU-2020:0920-2 |
| SUSE OpenStack Cloud 8 | libxslt | 1.1.28-17.9.1 | SUSE-SU-2020:0920-2 |
| SUSE OpenStack Cloud 7 | libxslt | 1.1.28-17.9.1 | SUSE-SU-2020:0920-2 |
| SUSE HPE Helion OpenStack 8 | libxslt | 1.1.28-17.9.1 | SUSE-SU-2020:0920-2 |
| SUSE Enterprise Storage 5 | libxslt | 1.1.28-17.9.1 | SUSE-SU-2020:0920-2 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | chromium | 93.0.4577.82-1.1 | openSUSE-SU-2024:12948-1, openSUSE-SU-2024:10681-1 |
| openSUSE Tumbleweed | libxslt | 1.1.34-3.2 | openSUSE-SU-2024:11017-1 |
| openSUSE Leap 15.1 | chromium | 80.0.3987.87-lp151.2.63.1 | openSUSE-SU-2020:0189-1 |
| openSUSE Leap 15.1 | libxslt +1 | 1.1.32-lp151.3.6.1 | openSUSE-SU-2020:0731-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libxslt | 1.1.33-r3 | — |
| Alpine v3.23 | libxslt | 1.1.33-r3 | — |
| Alpine v3.22 | libxslt | 1.1.33-r3 | — |
| Alpine v3.21 | libxslt | 1.1.33-r3 | — |
| Alpine v3.20 | libxslt | 1.1.33-r3 | — |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libxslt | 1.1.33-r3 | — |
| Alpine v3.18 | libxslt | 1.1.33-r3 | — |
| Alpine v3.17 | libxslt | 1.1.33-r3 | — |
| Alpine v3.16 | libxslt | 1.1.33-r3 | — |
| Alpine v3.15 | libxslt | 1.1.33-r3 | — |
| Alpine v3.14 | libxslt | 1.1.33-r3 | — |
| Alpine v3.13 | libxslt | 1.1.33-r3 | — |
| Alpine v3.12 | libxslt | 1.1.33-r3 | — |
| Alpine v3.11 | libxslt | 1.1.33-r3 | — |
| Alpine v3.10 | libxslt | 1.1.33-r2 | — |
| Alpine v3.9 | libxslt | 1.1.33-r2 | — |
| Alpine v3.8 | libxslt | 1.1.33-r2 | — |
| Alpine v3.7 | libxslt | 1.1.31-r2 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | libxslt +2 | 1.1.28-6.amzn2 | ALAS2-2020-1535 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | libxslt +1 | 1.1.32-5.0.1.el8 | ELSA-2020-4464 |
| Oracle Linux 7 | libxslt +2 | 1.1.28-6.0.1.el7 | ELSA-2020-4005 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| RubyGems | nokogiri | < 1.10.5 | 1.10.5 | GHSA-242x-7cm6-4w8j |
Advisories 19
- RHSA-2020:0514 Red Hat Security Advisory: chromium-browser security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- USN-4164-1 libxslt vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- RHSA-2020:4464 Red Hat Security Advisory: libxslt security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2020:4005 Red Hat Security Advisory: libxslt security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- DLA-1973-1 libxslt - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2020:0210-1 Security update for chromium SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0731-1 Security update for libxslt SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0189-1 Security update for chromium SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10681-1 chromedriver-93.0.4577.82-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1409-1 Security update for libxslt SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11017-1 libxslt-devel-1.1.34-3.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0920-2 Security update for libxslt SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12948-1 ungoogled-chromium-113.0.5672.92-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0233-1 Security update for chromium, re2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0920-1 Security update for libxslt SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-1639 Oracle Java SE: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 29, 2025
- ELSA-2020-4464 Moderate: libxslt security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 10, 2020
- ALAS2-2020-1535 Moderate: libxslt security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 22, 2020
- ELSA-2020-4005 Moderate: libxslt security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 6, 2020
References
- https://gitlab.gnome.org/GNOME/libxslt/commit/2232473733b7313d67de8836ea3b29eec6e8e285
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15914
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15768
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15746
- USN-4164-1 vendor-advisory
- [debian-lts-announce] 20191027 [SECURITY] [DLA 1973-1] libxslt security update mailing-list
- https://security.netapp.com/advisory/ntap-20191031-0004/
- [oss-security] 20191117 Nokogiri security update v1.10.5 mailing-list
- openSUSE-SU-2020:0189 vendor-advisory
- openSUSE-SU-2020:0210 vendor-advisory
- RHSA-2020:0514 vendor-advisory
- openSUSE-SU-2020:0233 vendor-advisory
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://security.netapp.com/advisory/ntap-20200416-0004/
- openSUSE-SU-2020:0731 vendor-advisory