{"schemaVersion":3,"id":"USN-8611-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"glibc vulnerabilities\n\nIt was discovered that the GNU C Library iconv function incorrectly handled\ncertain IBM character sets. An attacker could possibly use this issue to\ncause a denial of service. (CVE-2026-4046)\n\nIt was discovered that the GNU C Library DNS functions incorrectly handled\ncertain DNS server responses when using gethostbyaddr or gethostbyaddr_r.\nAn attacker in a privileged network position could possibly use this issue\nto cause an application to violate DNS specification or obtain incorrect\nhostname information. This issue only affected Ubuntu 24.04 LTS.\n(CVE-2026-4437, CVE-2026-4438)\n\nIt was discovered that the GNU C Library deprecated debugging functions\nincorrectly enforced caller-supplied buffer lengths. An attacker could\npossibly use this issue to cause a denial of service or execute arbitrary\ncode. (CVE-2026-5435)\n\nIt was discovered that the GNU C Library scanf family of functions\ncontained a heap buffer overflow when processing certain format specifiers.\nAn attacker could possibly use this issue to cause a denial of service or\nexecute arbitrary code. (CVE-2026-5450)\n\nIt was discovered that the GNU C Library ungetwc function incorrectly\nhandled certain character encodings. An attacker could possibly use this\nissue to obtain sensitive information or cause a denial of service.\n(CVE-2026-5928)\n\nIt was discovered that the GNU C Library deprecated debugging functions\nincorrectly validated DNS response record data. An attacker could possibly\nuse this issue to cause a denial of service or obtain sensitive\ninformation. (CVE-2026-6238)","dates":{"published":"2026-07-27T12:24:25.000Z","modified":"2026-07-27T21:14:45.559Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"glibc","name":"glibc","label":"glibc","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/glibc","purlType":"deb","versions":[{"text":"< 2.35-0ubuntu3.14","noFixRecorded":false,"fixedIn":null},{"text":"< 2.39-0ubuntu8.8","noFixRecorded":false,"fixedIn":null},{"text":"< 2.43-2ubuntu2.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.35-0ubuntu3.14 | < 2.39-0ubuntu8.8 | < 2.43-2ubuntu2.3","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8611-1","label":"ubuntu.com/security/notices/USN-8611-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-4046","label":"ubuntu.com/security/CVE-2026-4046","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-4437","label":"ubuntu.com/security/CVE-2026-4437","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-4438","label":"ubuntu.com/security/CVE-2026-4438","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-5435","label":"ubuntu.com/security/CVE-2026-5435","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-5450","label":"ubuntu.com/security/CVE-2026-5450","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-5928","label":"ubuntu.com/security/CVE-2026-5928","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-6238","label":"ubuntu.com/security/CVE-2026-6238","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2026-4046","CVE-2026-4437","CVE-2026-4438","CVE-2026-5435","CVE-2026-5450","CVE-2026-5928","CVE-2026-6238"],"downstream":[],"duplicates":[],"related":["CVE-2026-4046","CVE-2026-4437","CVE-2026-4438","CVE-2026-5435","CVE-2026-5450","CVE-2026-5928","CVE-2026-6238"]},"timeline":[{"kind":"published","date":"2026-07-27T12:24:25.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-07-27T21:14:45.559Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T06:57:12.710Z","stale":false,"partial":false}}