{"schemaVersion":3,"id":"CVE-2026-12725","aliases":["UBUNTU-CVE-2026-12725","DEBIAN-CVE-2026-12725","openSUSE-SU-2026:11116-1"],"status":"published","duplicateOf":null,"title":null,"description":"A heap-based buffer overflow was found in dnsmasq. When DNSSEC validation and\nquery logging are both enabled, logging of DS or DNSKEY replies containing\nunsupported algorithm or digest types can cause dnsmasq to write past the end\nof an internal logging buffer. A remote attacker able to supply such a DNS\nresponse may crash the dnsmasq process, resulting in denial of service.","dates":{"published":"2026-06-22T13:55:05.406Z","modified":"2026-08-31T21:22:15.716Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.9,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":5.6,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":5.6,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00528,"percentile":0.43502,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00528},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00528,"percentile":0.43502}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00528,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00528,"percentile":0.43502}]},"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":[{"id":"CWE-122","name":"Heap-based Buffer Overflow","description":"A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/122.html"}],"affected":[{"vendor":"debian","product":"dnsmasq","name":"dnsmasq","label":"dnsmasq","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/dnsmasq","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 2.91-1+deb13u2","noFixRecorded":false,"fixedIn":null},{"text":"< 2.93-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 2.91-1+deb13u2 | < 2.93-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"dnsmasq","name":"dnsmasq","label":"dnsmasq","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/dnsmasq","purlType":"deb","versions":[{"text":"< 2.90-0ubuntu0.16.04.1+esm4","noFixRecorded":false,"fixedIn":null},{"text":"< 2.90-0ubuntu0.18.04.1+esm4","noFixRecorded":false,"fixedIn":null},{"text":"< 2.90-0ubuntu0.20.04.1+esm3","noFixRecorded":false,"fixedIn":null},{"text":"< 2.90-0ubuntu0.22.04.4","noFixRecorded":false,"fixedIn":null},{"text":"< 2.90-2ubuntu0.4","noFixRecorded":false,"fixedIn":null},{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 2.92-1ubuntu0.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.90-0ubuntu0.16.04.1+esm4 | < 2.90-0ubuntu0.18.04.1+esm4 | < 2.90-0ubuntu0.20.04.1+esm3 | < 2.90-0ubuntu0.22.04.4 | < 2.90-2ubuntu0.4 | All versions (No fix recorded) | < 2.92-1ubuntu0.4","eol":null,"hubHref":null},{"vendor":"redhat","product":"enterprise_linux","name":"enterprise linux","label":"enterprise_linux","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"8.0","noFixRecorded":false,"fixedIn":null},{"text":"9.0","noFixRecorded":false,"fixedIn":null},{"text":"10.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"8.0 | 9.0 | 10.0","eol":{"isEol":false,"eolDate":"2029-05-31T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"8","label":"8 (Upcoming ELS)","eolFrom":"2029-05-31T00:00:00.000Z","isLts":false,"isMaintained":true,"latestVersion":"8.10"},"product":{"name":"rhel","label":"Red Hat Enterprise Linux","category":"os"}},"hubHref":"/vendor/redhat/enterprise_linux"},{"vendor":"redhat","product":"openshift_container_platform","name":"openshift container platform","label":"openshift_container_platform","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 4.0, ≤ 4.22.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 4.0, ≤ 4.22.1","eol":null,"hubHref":"/vendor/redhat/openshift_container_platform"},{"vendor":"opensuse","product":"dnsmasq&distro=openSUSE Tumbleweed","name":"dnsmasq","label":"dnsmasq&distro=openSUSE Tumbleweed","ecosystem":"openSUSE","cpePart":null,"purl":"pkg:rpm/opensuse/dnsmasq&distro=openSUSE Tumbleweed","purlType":"rpm","versions":[{"text":"< 2.93-1.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.93-1.1","eol":null,"hubHref":null},{"vendor":"thekelleys","product":"dnsmasq","name":"dnsmasq","label":"dnsmasq","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 2.93","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.93","eol":null,"hubHref":"/vendor/thekelleys/dnsmasq"}],"affectedCount":6,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-12725","label":"access.redhat.com/security/cve/CVE-2026-12725","hostname":"access.redhat.com","tags":["VDB Entry","X Refsource REDHAT","Mitigation","Vendor Advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2490763","label":"bugzilla.redhat.com/show_bug.cgi?id=2490763","hostname":"bugzilla.redhat.com","tags":["Issue Tracking","X Refsource REDHAT","Vendor Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-12725","label":"ubuntu.com/security/CVE-2026-12725","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-12725","label":"www.cve.org/CVERecord?id=CVE-2026-12725","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-8542-1","label":"ubuntu.com/security/notices/USN-8542-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-12725","label":"security-tracker.debian.org/tracker/CVE-2026-12725","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-12725","label":"www.suse.com/security/cve/CVE-2026-12725","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12725","label":"nvd.nist.gov/vuln/detail/CVE-2026-12725","hostname":"nvd.nist.gov","tags":["Oval","Advisory"]}],"lineage":{"upstream":[],"downstream":["MGASA-2026-0288","OPENSUSE-SU-2026:21192-1","SUSE-SU-2026:22454-1","SUSE-SU-2026:22496-1","SUSE-SU-2026:22706-1","SUSE-SU-2026:2974-1","SUSE-SU-2026:3028-1","USN-8542-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:21192-1","SUSE-SU-2026:22454-1","SUSE-SU-2026:22496-1","SUSE-SU-2026:22706-1","SUSE-SU-2026:2974-1","SUSE-SU-2026:3028-1","USN-8542-1"]},"timeline":[{"kind":"published","date":"2026-06-22T13:55:05.406Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-31T21:22:15.716Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":24,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T23:56:03.459Z","stale":false,"partial":false}}