{"id":"CVE-2019-17543","title":"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","summary":"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 s…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-787"],"vendor":"lz4_project","product":"lz4","affected":["lz4 < 1.9.2"],"patched":["lz4 1.9.2"],"published":"2019-10-14","updated":"2026-10-08","sourceUpdated":"2026-10-08T22:16:51.503","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2019-17543","references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00069.html","label":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00070.html","label":"cve@mitre.org"},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15941","label":"cve@mitre.org"},{"url":"https://github.com/lz4/lz4/compare/v1.9.1...v1.9.2","label":"cve@mitre.org"},{"url":"https://github.com/lz4/lz4/issues/801","label":"cve@mitre.org"},{"url":"https://github.com/lz4/lz4/pull/756","label":"cve@mitre.org"},{"url":"https://github.com/lz4/lz4/pull/760","label":"cve@mitre.org"},{"url":"https://lists.apache.org/thread.html/25015588b770d67470b7ba7ea49a305d6735dd7f00eabe7d50ec1e17%40%3Cissues.arrow.apache.org%3E","label":"cve@mitre.org"},{"url":"https://lists.apache.org/thread.html/543302d55e2d2da4311994e9b0debdc676bf3fd05e1a2be3407aa2d6%40%3Cissues.arrow.apache.org%3E","label":"cve@mitre.org"},{"url":"https://lists.apache.org/thread.html/793012683dc0fa6819b7c2560e6cf990811014c40c7d75412099c357%40%3Cissues.arrow.apache.org%3E","label":"cve@mitre.org"},{"url":"https://lists.apache.org/thread.html/9ff0606d16be2ab6a81619e1c9e23c3e251756638e36272c8c8b7fa3%40%3Cissues.arrow.apache.org%3E","label":"cve@mitre.org"},{"url":"https://lists.apache.org/thread.html/f0038c4fab2ee25aee849ebeff6b33b3aa89e07ccfb06b5c87b36316%40%3Cissues.arrow.apache.org%3E","label":"cve@mitre.org"},{"url":"https://lists.apache.org/thread.html/f506bc371d4a068d5d84d7361293568f61167d3a1c3e91f0def2d7d3%40%3Cdev.arrow.apache.org%3E","label":"cve@mitre.org"},{"url":"https://lists.apache.org/thread.html/r0fb226357e7988a241b06b93bab065bcea2eb38658b382e485960e26%40%3Cissues.kudu.apache.org%3E","label":"cve@mitre.org"},{"url":"https://lists.apache.org/thread.html/r4068ba81066792f2b4d208b39c4c4713c5d4c79bd8cb6c1904af5720%40%3Cissues.kudu.apache.org%3E","label":"cve@mitre.org"},{"url":"https://lists.apache.org/thread.html/r7bc72200f94298bc9a0e35637f388deb53467ca4b2e2ad1ff66d8960%40%3Cissues.kudu.apache.org%3E","label":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20210723-0001/","label":"cve@mitre.org"},{"url":"https://www.oracle.com//security-alerts/cpujul2021.html","label":"cve@mitre.org"},{"url":"https://www.oracle.com/security-alerts/cpuoct2020.html","label":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00069.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00070.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15941","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/lz4/lz4/compare/v1.9.1...v1.9.2","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/lz4/lz4/issues/801","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/lz4/lz4/pull/756","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/lz4/lz4/pull/760","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/25015588b770d67470b7ba7ea49a305d6735dd7f00eabe7d50ec1e17%40%3Cissues.arrow.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/543302d55e2d2da4311994e9b0debdc676bf3fd05e1a2be3407aa2d6%40%3Cissues.arrow.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/793012683dc0fa6819b7c2560e6cf990811014c40c7d75412099c357%40%3Cissues.arrow.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/9ff0606d16be2ab6a81619e1c9e23c3e251756638e36272c8c8b7fa3%40%3Cissues.arrow.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/f0038c4fab2ee25aee849ebeff6b33b3aa89e07ccfb06b5c87b36316%40%3Cissues.arrow.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/f506bc371d4a068d5d84d7361293568f61167d3a1c3e91f0def2d7d3%40%3Cdev.arrow.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r0fb226357e7988a241b06b93bab065bcea2eb38658b382e485960e26%40%3Cissues.kudu.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r4068ba81066792f2b4d208b39c4c4713c5d4c79bd8cb6c1904af5720%40%3Cissues.kudu.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.apache.org/thread.html/r7bc72200f94298bc9a0e35637f388deb53467ca4b2e2ad1ff66d8960%40%3Cissues.kudu.apache.org%3E","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20210723-0001/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com//security-alerts/cpujul2021.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.oracle.com/security-alerts/cpuoct2020.html","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.09116,"epssPercentile":0.95192,"ingestedAt":"2026-10-08T23:16:47.300Z","slug":"CVE-2019-17543","body":"## Overview\n\nLZ4 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.\"\n\n## Affected\n\n- `lz4 < 1.9.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `lz4 1.9.2`","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":44.6,"likelihood":1.8,"exploitation":0,"ransomware":0},"changes":[]}