{"id":"USN-7959-1","summary":"klibc vulnerabilities","details":"It was discovered that zlib, vendored in klibc, did not properly handle\ninteger arithmetic. An attacker could possibly use this issue to execute\narbitrary code or cause a denial of service.","modified":"2026-06-25T13:32:31.478044905Z","published":"2026-01-14T05:20:01Z","related":["UBUNTU-CVE-2016-9843"],"upstream":["UBUNTU-CVE-2016-9843"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7959-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-9843"}],"affected":[{"package":{"name":"klibc","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/klibc?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.3-0ubuntu1.14.04.3+esm4"}]}],"versions":["2.0.1-3.1ubuntu2","2.0.2-1ubuntu1","2.0.2-1ubuntu2","2.0.3-0ubuntu1","2.0.3-0ubuntu1.14.04.1","2.0.3-0ubuntu1.14.04.2","2.0.3-0ubuntu1.14.04.3","2.0.3-0ubuntu1.14.04.3+esm2","2.0.3-0ubuntu1.14.04.3+esm3"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.3-0ubuntu1.14.04.3+esm4","binary_name":"klibc-utils"},{"binary_name":"libklibc","binary_version":"2.0.3-0ubuntu1.14.04.3+esm4"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: 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https://ubuntu.com/pro","binaries":[{"binary_name":"klibc-utils","binary_version":"2.0.4-9ubuntu2.2+esm2"},{"binary_name":"libklibc","binary_version":"2.0.4-9ubuntu2.2+esm2"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2016-9843","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}]}],"ecosystem":"Ubuntu:Pro:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7959-1.json"}},{"package":{"name":"klibc","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/klibc?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.7-1ubuntu5.2+esm1"}]}],"versions":["2.0.6-1ubuntu1","2.0.6-1ubuntu2","2.0.7-1ubuntu1","2.0.7-1ubuntu3","2.0.7-1ubuntu4","2.0.7-1ubuntu5","2.0.7-1ubuntu5.1","2.0.7-1ubuntu5.2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.7-1ubuntu5.2+esm1","binary_name":"klibc-utils"},{"binary_name":"libklibc","binary_version":"2.0.7-1ubuntu5.2+esm1"}],"availability":"Available 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