{"schemaVersion":3,"id":"MGASA-2026-0135","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Updated dnsmasq packages fix security vulnerabilities\n\nCVE-2026-2291: dnsmasqs extract_name() function can be abused to cause a\nheap buffer overflow, allowing an attacker to inject false DNS cache\nentries, which could result in DNS lookups to redirect to an\nattacker-controlled IP address, or to cause a DoS.\n        CVE-2026-4890: A Denial of Service (DoS) vulnerability in the\nDNSSEC validation of dnsmasq allows remote attackers to cause a denial\nof service via a crafted DNS packet.\n        CVE-2026-4891: A heap-based out-of-bounds read vulnerability in\nthe DNSSEC validation of dnsmasq allows remote attackers to cause a\ndenial of service via a crafted DNS packet.\n        CVE-2026-4892: A heap-based out-of-bounds write vulnerability in\nthe DHCPv6 implementation of dnsmasq allows local attackers to execute\narbitrary code with root privileges via a crafted DHCPv6 packet.\n        CVE-2026-4893: An information disclosure vulnerability in\ndnsmasq allows remote attackers to bypass source checks via a crafted\nDNS packet with RFC 7871 client subnet information.\n        CVE-2026-5172: A buffer overflow in dnsmasq’s\nextract_addresses() function allows an attacker to trigger a heap\nout-of-bounds read and crash by exploiting a malformed DNS response,\nenabling extract_name() to advance the pointer past the record’s end.","dates":{"published":"2026-05-14T02:43:25.000Z","modified":"2026-05-14T02:45:20.443Z","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":"mageia","product":"dnsmasq","name":"dnsmasq","label":"dnsmasq","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/dnsmasq","purlType":"rpm","versions":[{"text":"< 2.92rel2-1.mga9","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.92rel2-1.mga9","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://advisories.mageia.org/MGASA-2026-0135.html","label":"advisories.mageia.org/MGASA-2026-0135.html","hostname":"advisories.mageia.org","tags":["Advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=35520","label":"bugs.mageia.org/show_bug.cgi?id=35520","hostname":"bugs.mageia.org","tags":["REPORT"]},{"url":"https://thekelleys.org.uk/dnsmasq/CHANGELOG","label":"thekelleys.org.uk/dnsmasq/CHANGELOG","hostname":"thekelleys.org.uk","tags":["WEB"]}],"lineage":{"upstream":["CVE-2026-2291","CVE-2026-4890","CVE-2026-4891","CVE-2026-4892","CVE-2026-4893","CVE-2026-5172"],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-05-14T02:43:25.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-05-14T02:45:20.443Z","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":"2026-10-20T05:44:05.062Z","stale":false,"partial":false}}