{"id":"USN-8706-1","summary":"zlib vulnerability","details":"It was discovered that zlib incorrectly handled negative length parameters\nin CRC32 combine functions. An attacker could use this issue to cause a denial\nof service via excessive CPU consumption.","modified":"2026-09-09T19:57:43.338639753Z","published":"2026-08-31T17:30:43Z","related":["UBUNTU-CVE-2026-27171"],"upstream":["CVE-2026-27171","UBUNTU-CVE-2026-27171"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8706-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-27171"}],"affected":[{"package":{"name":"zlib","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/zlib?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.3.dfsg-3.1ubuntu2.2"}]}],"versions":["1:1.2.13.dfsg-1ubuntu5","1:1.3.dfsg-3ubuntu1","1:1.3.dfsg-3.1ubuntu1","1:1.3.dfsg-3.1ubuntu2","1:1.3.dfsg-3.1ubuntu2.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:1.3.dfsg-3.1ubuntu2.2","binary_name":"lib32z1"},{"binary_name":"lib64z1","binary_version":"1:1.3.dfsg-3.1ubuntu2.2"},{"binary_name":"libminizip1t64","binary_version":"1:1.3.dfsg-3.1ubuntu2.2"},{"binary_name":"libx32z1","binary_version":"1:1.3.dfsg-3.1ubuntu2.2"},{"binary_version":"1:1.3.dfsg-3.1ubuntu2.2","binary_name":"minizip"},{"binary_name":"zlib1g","binary_version":"1:1.3.dfsg-3.1ubuntu2.2"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8706-1.json","cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"id":"CVE-2026-27171","severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"low"}]}]}}},{"package":{"name":"zlib","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/zlib?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.3.dfsg+really1.3.1-1ubuntu3.1"}]}],"versions":["1:1.3.dfsg+really1.3.1-1ubuntu2","1:1.3.dfsg+really1.3.1-1ubuntu3"],"ecosystem_specific":{"binaries":[{"binary_name":"lib32z1","binary_version":"1:1.3.dfsg+really1.3.1-1ubuntu3.1"},{"binary_name":"lib64z1","binary_version":"1:1.3.dfsg+really1.3.1-1ubuntu3.1"},{"binary_name":"libminizip1t64","binary_version":"1:1.3.dfsg+really1.3.1-1ubuntu3.1"},{"binary_name":"libx32z1","binary_version":"1:1.3.dfsg+really1.3.1-1ubuntu3.1"},{"binary_version":"1:1.3.dfsg+really1.3.1-1ubuntu3.1","binary_name":"minizip"},{"binary_name":"zlib1g","binary_version":"1:1.3.dfsg+really1.3.1-1ubuntu3.1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:26.04:LTS","cves":[{"id":"CVE-2026-27171","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"low"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8706-1.json"}}],"schema_version":"1.9.0"}