{"id":"USN-8733-1","summary":"gzip vulnerabilities","details":"Michał Majchrowicz and Marcin Wyczechowski discovered that Gzip's gzexe\nutility created temporary files in an insecure manner when mktemp was\nunavailable. A local attacker could possibly use this issue to overwrite\narbitrary files. (CVE-2026-41991)\n\nElias Hasas, Michał Majchrowicz and Marcin Wyczechowski discovered that Gzip incorrectly\nhandled certain compressed files. An attacker could possibly use this\nissue to obtain sensitive information or cause Gzip to crash, resulting\nin a denial of service. (CVE-2026-41992)","modified":"2026-09-08T19:57:20.262905891Z","published":"2026-09-07T12:23:00Z","related":["UBUNTU-CVE-2026-41991","UBUNTU-CVE-2026-41992"],"upstream":["CVE-2026-41991","CVE-2026-41992","UBUNTU-CVE-2026-41991","UBUNTU-CVE-2026-41992"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8733-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-41991"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-41992"}],"affected":[{"package":{"name":"gzip","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/gzip?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6-4ubuntu1+esm2"}]}],"versions":["1.6-4ubuntu1","1.6-4ubuntu1+esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_version":"1.6-4ubuntu1+esm2","binary_name":"gzip"}]},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-41991","severity":[{"score":"CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2026-41992","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8733-1.json"}}],"schema_version":"1.9.0"}