Description
LZ4 before 1.9.2 has a heap-based buffer overflow in LZ4_write32 (related to LZ4_compress_destSize), affecting applications that call LZ4_compress_fast with a large input. (This issue can also lead to data corruption.) NOTE: the vendor states "only a few specific / uncommon usages of the API are at risk."
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 | lz4 | 1.9.2-1 | — |
| Debian 13 | lz4 | 1.9.2-1 | — |
| Debian 12 | lz4 | 1.9.2-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | lz4 +2 | 1.8.3-5.el8_10 | RHSA-2025:11035 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | lz4 +2 | 1.8.3-5.el8_10 | ALSA-2025:11035 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | lz4 | 1.8.3-5.el8_10 | RLSA-2025:11035 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | lz4 | 1.8.0-3.5.1 | SUSE-SU-2019:2757-1 |
| SLES 15 | lz4 | 1.8.0-3.5.1 | SUSE-SU-2019:2757-1 |
| SLES 12 SP5 | lz4 | 1.8.0-3.3.1 | SUSE-SU-2021:1613-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | lz4 | 1.9.3-1.5 | openSUSE-SU-2024:11034-1 |
| openSUSE Leap 15.1 | lz4 +1 | 1.8.0-lp151.3.3.1 | openSUSE-SU-2019:2399-1 |
| openSUSE Leap 15.0 | lz4 +1 | 1.8.0-lp150.2.3.1 | openSUSE-SU-2019:2398-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | lz4 | 1.9.2-r0 | — |
| Alpine v3.23 | lz4 | 1.9.2-r0 | — |
| Alpine v3.22 | lz4 | 1.9.2-r0 | — |
| Alpine v3.21 | lz4 | 1.9.2-r0 | — |
| Alpine v3.20 | lz4 | 1.9.2-r0 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | lz4 | 1.9.2-r0 | — |
| Alpine v3.18 | lz4 | 1.9.2-r0 | — |
| Alpine v3.17 | lz4 | 1.9.2-r0 | — |
| Alpine v3.16 | lz4 | 1.9.2-r0 | — |
| Alpine v3.15 | lz4 | 1.9.2-r0 | — |
| Alpine v3.14 | lz4 | 1.9.2-r0 | — |
| Alpine v3.13 | lz4 | 1.9.2-r0 | — |
| Alpine v3.12 | lz4 | 1.9.2-r0 | — |
| Alpine v3.11 | lz4 | 1.9.2-r0 | — |
| Alpine v3.10 | lz4 | 1.9.1-r1 | — |
Advisories 14
- ALSA-2025:11035 Moderate: lz4 security update AlmaLinux Security Advisories · Oct 29, 2026
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- RHSA-2025:11035 Red Hat Security Advisory: lz4 security update Red Hat Security Advisories (RHSA) · Mar 18, 2026
- WID-SEC-2025-1905 IBM QRadar SIEM Komponente: Mehrere Schwachstellen BSI CERT-Bund (WID) · Mar 4, 2026
- SUSE-SU-2019:2757-1 Security update for lz4 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:1613-1 Security update for lz4 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2398-1 Security update for lz4 SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0063 Juniper Junos Space: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 8, 2025
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- RLSA-2025:11035 Moderate: lz4 security update Rocky Linux Security Advisories · Jul 29, 2025
- WID-SEC-2025-1550 Red Hat Enterprise Linux (LZ4): Schwachstelle ermöglicht nicht spezifizierten Angriff BSI CERT-Bund (WID) · Jul 15, 2025
- openSUSE-SU-2019:2399-1 Security update for lz4 SUSE / openSUSE Security Updates · May 7, 2025
- openSUSE-SU-2024:11034-1 liblz4-1-1.9.3-1.5 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ICSA-24-284-16 Rockwell Automation DataMosaix Private Cloud CISA ICS & IT advisories · Oct 10, 2024
References
- [arrow-issues] 20191024 [jira] [Created] (ARROW-6984) Update LZ4 to 1.9.2 for CVE-2019-17543 mailing-list
- [arrow-dev] 20191024 [jira] [Created] (ARROW-6984) Update LZ4 to 1.9.2 for CVE-2019-17543 mailing-list
- [arrow-issues] 20191024 [jira] [Updated] (ARROW-6984) [C++] Update LZ4 to 1.9.2 for CVE-2019-17543 mailing-list
- [arrow-issues] 20191024 [jira] [Assigned] (ARROW-6984) [C++] Update LZ4 to 1.9.2 for CVE-2019-17543 mailing-list
- [arrow-issues] 20191025 [jira] [Commented] (ARROW-6984) [C++] Update LZ4 to 1.9.2 for CVE-2019-17543 mailing-list
- openSUSE-SU-2019:2399 vendor-advisory
- openSUSE-SU-2019:2398 vendor-advisory
- [arrow-issues] 20191106 [jira] [Resolved] (ARROW-6984) [C++] Update LZ4 to 1.9.2 for CVE-2019-17543 mailing-list
- [kudu-issues] 20200621 [jira] [Updated] (KUDU-3156) Whether the CVE-2019-17543 vulnerability of lz affects kudu mailing-list
- [kudu-issues] 20200709 [jira] [Resolved] (KUDU-3156) Whether the CVE-2019-17543 vulnerability of lz affects kudu mailing-list
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://github.com/lz4/lz4/pull/756
- https://github.com/lz4/lz4/pull/760
- https://github.com/lz4/lz4/compare/v1.9.1...v1.9.2
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15941
- https://github.com/lz4/lz4/issues/801
- https://lists.apache.org/thread.html/r0fb226357e7988a241b06b93bab065bcea2eb38658b382e485960e26%40%3Cissues.kudu.apache.org%3E
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://security.netapp.com/advisory/ntap-20210723-0001/