8.1

CVE-2019-17543: lz4_project lz4 Out-of-bounds Write

CVSS: 8.1v3.1HighModified
AliasesALPINE-CVE-2019-17543MGASA-2019-0375SUSE-SU-2019:2757-1
Published 14-10-2019Last modified 14-10-2026
Open JSON

Vulnerability summary

CVE-2019-17543 is a high (CVSS 8.1) Out-of-bounds Write vulnerability in lz4_project lz4. EPSS estimates a 9.12% chance of exploitation in the next 30 days, higher than 95.2% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (NVD)
EPSS score
9.12%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
SUSE-SU-2021:1613-1

Timeline

  1. 14-10-2019
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

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."

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

9.12%

Chance of exploitation in the next 30 days

Percentile

95%

Versus all other CVEs

30-day change

0.00 pp

From 9.12% on 18-09-2026

18-09-202618-10-2026
EPSS score
9.12%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Redhat6 products
  • lz4< 0:1.8.3-5.el8_10
  • lz4-debuginfo< 0:1.8.3-5.el8_10
  • lz4-debugsource< 0:1.8.3-5.el8_10
  • lz4-devel< 0:1.8.3-5.el8_10
  • lz4-libs< 0:1.8.3-5.el8_10
Opensuse5 products
  • lz4-test&distro=openSUSE Leap 15.0< 1.8.0-lp150.2.3.1
  • lz4-test&distro=openSUSE Leap 15.1< 1.8.0-lp151.3.3.1
  • lz4&distro=openSUSE Leap 15.0< 1.8.0-lp150.2.3.1
  • lz4&distro=openSUSE Leap 15.1< 1.8.0-lp151.3.3.1
  • lz4&distro=openSUSE Tumbleweed< 1.9.3-1.5
Suse2 products
  • lz4&distro=SUSE Linux Enterprise Module for Basesystem 15< 1.8.0-3.5.1
  • lz4&distro=SUSE Linux Enterprise Module for Basesystem 15 SP1< 1.8.0-3.5.1
Alpine1 product
  • lz4< 1.9.1-r1 | < 1.9.2-r0
Debian1 product
  • lz4< 1.9.2-1
Lz4_project1 product
Mageia1 product
  • lz4< 1.9.2-1.mga7
Ubuntu1 product
  • lz4< 0.0~r131-2ubuntu3.1 | < 1.9.2-2

8 vendors · 18 products

References

38 links
Show all 38 references