{"schemaVersion":3,"id":"CVE-2026-61477","aliases":["UBUNTU-CVE-2026-61477","DEBIAN-CVE-2026-61477"],"status":"published","duplicateOf":null,"title":null,"description":"An injection vulnerability was found in libvirt's virtual network driver. The network XML parser does not strip newline characters from DNS TXT record value attributes and SRV record domain/target attributes. These values are written verbatim into the dnsmasq configuration file generated by the network driver, allowing a user with permission to define virtual networks to inject arbitrary dnsmasq configuration directives such as dhcp-script, leading to arbitrary command execution as root.","dates":{"published":"2026-08-07T14:09:23.058Z","modified":"2026-08-07T18:21:52.947Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":2.3,"severity":"low","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":2.3,"severity":"low","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":2.3,"severity":"low","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N","exploitability":2.1,"impact":2.3,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":2.3,"severity":"low","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N","exploitability":2.1,"impact":2.3,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":2.3,"severity":"low","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00163,"percentile":0.05144,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00163},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00163,"percentile":0.05144}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00163,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00163,"percentile":0.05144}]},"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-93","name":"Improper Neutralization of CRLF Sequences ('CRLF Injection')","description":"The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/93.html"}],"affected":[{"vendor":"debian","product":"libvirt","name":"libvirt","label":"libvirt","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/libvirt","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 11.3.0-3+deb13u3","noFixRecorded":false,"fixedIn":null},{"text":"< 12.6.0-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 11.3.0-3+deb13u3 | < 12.6.0-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"libvirt","name":"libvirt","label":"libvirt","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libvirt","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 1.3.1-1ubuntu10.31+esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 4.0.0-1ubuntu8.21+esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 6.0.0-0ubuntu8.20+esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 8.0.0-1ubuntu7.19","noFixRecorded":false,"fixedIn":null},{"text":"< 10.0.0-2ubuntu8.16","noFixRecorded":false,"fixedIn":null},{"text":"< 12.0.0-1ubuntu5.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 1.3.1-1ubuntu10.31+esm1 | < 4.0.0-1ubuntu8.21+esm1 | < 6.0.0-0ubuntu8.20+esm1 | < 8.0.0-1ubuntu7.19 | < 10.0.0-2ubuntu8.16 | < 12.0.0-1ubuntu5.3","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"libvirt-hwe","name":"libvirt-hwe","label":"libvirt-hwe","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libvirt-hwe","purlType":"deb","versions":[{"text":"< 12.0.0-1ubuntu5.5","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 12.0.0-1ubuntu5.5","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-61477","label":"access.redhat.com/security/cve/CVE-2026-61477","hostname":"access.redhat.com","tags":["VDB Entry","X Refsource REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2512066","label":"bugzilla.redhat.com/show_bug.cgi?id=2512066","hostname":"bugzilla.redhat.com","tags":["Issue Tracking","X Refsource REDHAT"]},{"url":"https://gitlab.com/libvirt/libvirt/-/commit/3cfc77963b512d809348fca07f97fe924fac9a05","label":"gitlab.com/libvirt/libvirt/-/commit/3cfc77963b512d809348fca07f97fe924fac9a05","hostname":"gitlab.com","tags":[]},{"url":"https://ubuntu.com/security/CVE-2026-61477","label":"ubuntu.com/security/CVE-2026-61477","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-61477","label":"www.cve.org/CVERecord?id=CVE-2026-61477","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2512068","label":"bugzilla.redhat.com/show_bug.cgi?id=2512068","hostname":"bugzilla.redhat.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-8652-1","label":"ubuntu.com/security/notices/USN-8652-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-8833-1","label":"ubuntu.com/security/notices/USN-8833-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-61477","label":"security-tracker.debian.org/tracker/CVE-2026-61477","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61477","label":"nvd.nist.gov/vuln/detail/CVE-2026-61477","hostname":"nvd.nist.gov","tags":["Oval","Advisory"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:21738-1","SUSE-SU-2026:23445-1","SUSE-SU-2026:23460-1","SUSE-SU-2026:23515-1","SUSE-SU-2026:23603-1","SUSE-SU-2026:3939-1","SUSE-SU-2026:4004-1","SUSE-SU-2026:4009-1","SUSE-SU-2026:4010-1","SUSE-SU-2026:4141-1","USN-8652-1","USN-8833-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:21738-1","SUSE-SU-2026:23445-1","SUSE-SU-2026:23460-1","SUSE-SU-2026:23515-1","SUSE-SU-2026:23603-1","SUSE-SU-2026:3939-1","SUSE-SU-2026:4004-1","SUSE-SU-2026:4009-1","SUSE-SU-2026:4010-1","SUSE-SU-2026:4141-1","USN-8652-1","USN-8833-1"]},"timeline":[{"kind":"published","date":"2026-08-07T14:09:23.058Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-07T18:21:52.947Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":9,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T21:45:42.101Z","stale":false,"partial":false}}