lz4 vulnerabilities and fixes

Recent CVEs affecting lz4, with upgrade or downgrade steps. 3 tracked.

lz4 has 3 tracked vulnerabilities, 1 critical. A fixed release or vendor patch exists for 3. Most recent: 2021-06-02. Highest priority: CVE-2021-3520 (score 62/100).

• CVE-2021-3520 CRITICAL 9.8 UPGRADE MITIGATE There's a flaw in lz4
• CVE-2019-17543 HIGH 8.1 UPGRADE LZ4 before 1.9.2 has a heap-based buffer overflow in LZ4_write32 (related to LZ4_compress_destSize), affecting
• CVE-2014-4715 MEDIUM 5.0 UPGRADE Yann Collet LZ4 before r119, when used on certain 32-bit platforms that allocate memory beyond 0x80000000, doe

FAQ

How do I fix lz4 vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is lz4 being exploited right now?

None of the tracked lz4 CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which lz4 CVE should I patch first?

CVE-2021-3520 currently ranks highest (62/100): There's a flaw in lz4.

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