lz4: heap-based buffer overflow in LZ4_write32
Published Oct 14, 2019
8.1
HIGHCVSS 3.1
EPSS 9.12%
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."
Affected products
No data.
- < 1.9.2
No data.
Red Hat Enterprise Linux 8
lz4-0:1.8.3-5.el8_10
Fixed · RHSA-2025:11035
Red Hat Enterprise Linux 7
lz4
Will not fix
Red Hat OpenStack Platform 10 (Newton)
lz4
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | lz4-0:1.8.3-5.el8_10 | Fixed | RHSA-2025:11035 |
| Red Hat Enterprise Linux 7 | lz4 | Will not fix | n/a |
| Red Hat OpenStack Platform 10 (Newton) | lz4 | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
According to upstream, this flaw cannot be exploited under normal, documented use of the LZ4 library API. Additionally, the flaw is present only in the LZ4 library itself, and the application binaries shipped with this package are not affected. Red Hat OpenStack Platform 10 includes an older version of LZ4 that contains the flawed code. However, OpenStack has been using RHEL's updated LZ4 version since RHEL 7.5, so Red Hat is not issuing an update for the OpenStack LZ4 package. This CVE is rated as moderate because Red Hat products do not use the vulnerable version of lz4 in current OpenStack offerings.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (26 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 9.12% (0.09116) | 95.16th | v5 (v2026.06.15) |
| Jun 15, 2026 | 9.12% (0.09116) | 94.64th | v5 (v2026.06.15) |
| Nov 21, 2025 | 1.72% (0.01717) | 81.80th | v4 (v2025.03.14) |
| Nov 18, 2025 | 6.57% (0.06565) | 90.22th | v4 (v2025.03.14) |
| Nov 3, 2025 | 3.80% (0.03796) | 87.64th | v4 (v2025.03.14) |
| Jul 13, 2025 | 2.29% (0.02292) | 84.03th | v4 (v2025.03.14) |
| Mar 30, 2025 | 4.45% (0.04446) | 88.01th | v4 (v2025.03.14) |
| Mar 29, 2025 | 12.49% (0.12491) | 89.85th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.45% (0.04446) | 88.31th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.77% (0.00765) | 81.87th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.75% (0.00752) | 81.08th | v3 (v2023.03.01) |
| Feb 6, 2024 | 0.75% (0.00752) | 79.08th | v3 (v2023.03.01) |
| Sep 19, 2023 | 0.76% (0.00763) | 78.99th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.67% (0.00668) | 77.18th | v3 (v2023.03.01) |
| Aug 17, 2023 | 0.70% (0.00696) | 77.70th | v3 (v2023.03.01) |
| Aug 2, 2023 | 0.72% (0.00717) | 78.00th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.60% (0.00600) | 75.15th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 24.56% (0.24563) | 95.26th | v2 (v2022.01.01) |
| Feb 3, 2022 | 16.00% (0.16004) | 90.20th | v1 |
| Jan 6, 2022 | 16.00% (0.16004) | 90.09th | v1 |
| Sep 1, 2021 | 4.07% (0.04074) | 83.31th | v1 |
| Jul 24, 2021 | 4.07% (0.04074) | 0.00th | v1 |
| Jul 21, 2021 | 3.88% (0.03876) | 0.00th | v1 |
| Apr 14, 2021 | 3.68% (0.03679) | 0.00th | v1 |
References (23)
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00069.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00070.html vendor-advisoryx_refsource_SUSE
- https://access.redhat.com/security/cve/CVE-2019-17543 Vendor Advisory
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15941 x_refsource_MISCThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1765316 Issue Tracking
- https://github.com/lz4/lz4/compare/v1.9.1...v1.9.2 x_refsource_MISCThird Party Advisory
- https://github.com/lz4/lz4/issues/801 x_refsource_MISCThird Party Advisory
- https://github.com/lz4/lz4/pull/756 x_refsource_MISCPatchThird Party Advisory
- https://github.com/lz4/lz4/pull/760 x_refsource_MISCPatchThird Party Advisory
- https://lists.apache.org/thread.html/25015588b770d67470b7ba7ea49a305d6735dd7f00eabe7d50ec1e17%40%3Cissues.arrow.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/543302d55e2d2da4311994e9b0debdc676bf3fd05e1a2be3407aa2d6%40%3Cissues.arrow.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/793012683dc0fa6819b7c2560e6cf990811014c40c7d75412099c357%40%3Cissues.arrow.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/9ff0606d16be2ab6a81619e1c9e23c3e251756638e36272c8c8b7fa3%40%3Cissues.arrow.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/f0038c4fab2ee25aee849ebeff6b33b3aa89e07ccfb06b5c87b36316%40%3Cissues.arrow.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/f506bc371d4a068d5d84d7361293568f61167d3a1c3e91f0def2d7d3%40%3Cdev.arrow.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r0fb226357e7988a241b06b93bab065bcea2eb38658b382e485960e26%40%3Cissues.kudu.apache.org%3E x_refsource_MISC
- https://lists.apache.org/thread.html/r4068ba81066792f2b4d208b39c4c4713c5d4c79bd8cb6c1904af5720%40%3Cissues.kudu.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r7bc72200f94298bc9a0e35637f388deb53467ca4b2e2ad1ff66d8960%40%3Cissues.kudu.apache.org%3E mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2019-17543
- https://security.netapp.com/advisory/ntap-20210723-0001/ x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2019-17543
- https://www.oracle.com//security-alerts/cpujul2021.html x_refsource_MISC
- https://www.oracle.com/security-alerts/cpuoct2020.html x_refsource_MISC
Change history (0)
No recorded changes yet.