CVE•Published 2019-10-14•Modified 2026-10-14•1 article on news•6 live references•NVD data
CVE-2019-17543Lz4_project · Lz4
Vulnerability data via NVD (ingested)
CVSS v3.1
8.1
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
95
Exploit Prediction Scoring System · top 5% of all CVEs
Weaknesses (CWE)
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."
Timeline
Published 2019-10-14
Modified 2026-10-14
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2019-17543Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Lz4 Project Lz4"All exposed Lz4 Project Lz4 instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Lz4"HTTP body or banner mentions "Lz4" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2019-17543Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2019-17543Censys host search filtered to this CVE id.
grep.app
CVE-2019-17543Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2019-17543GitHub code search for direct mentions.
Google dork
"CVE-2019-17543" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2019-17543 on GitHub.