{"schemaVersion":3,"id":"CVE-2026-7837","aliases":["UBUNTU-CVE-2026-7837","DEBIAN-CVE-2026-7837"],"status":"published","duplicateOf":null,"title":null,"description":"A time-of-check time-of-use (TOCTOU) condition in the ad_flush function in Netatalk 3.0.0 through 4.4.2 involves root-privileged file operations, which may allow a remote attacker to cause limited data modification under specific race conditions.","dates":{"published":"2026-05-21T08:14:44.776Z","modified":"2026-05-21T12:50:33.383Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":3.7,"severity":"low","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:L/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":3.7,"severity":"low","vector":"CVSS:3.1/AV:N/AC:H/PR:N/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":3.7,"severity":"low","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","exploitability":5.6,"impact":2.3,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":3.7,"severity":"low","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","exploitability":5.6,"impact":2.3,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":3.7,"severity":"low","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00267,"percentile":0.17672,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.030999999999999993,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00236},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00267,"percentile":0.17672}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00236,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00267,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00267,"percentile":0.17672}]},"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-367","name":"Time-of-check Time-of-use (TOCTOU) Race Condition","description":"The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/367.html"}],"affected":[{"vendor":"debian","product":"netatalk","name":"netatalk","label":"netatalk","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/netatalk","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 4.5.0~ds-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 4.5.0~ds-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"netatalk","name":"netatalk","label":"netatalk","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/netatalk","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"netatalk","product":"netatalk","name":"netatalk","label":"netatalk","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 3.0.0, ≤ 4.4.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 3.0.0, ≤ 4.4.2","eol":null,"hubHref":"/vendor/netatalk/netatalk"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://netatalk.io/security/CVE-2026-7837","label":"netatalk.io/security/CVE-2026-7837","hostname":"netatalk.io","tags":["Vendor Advisory","REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-7837","label":"ubuntu.com/security/CVE-2026-7837","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-7837","label":"www.cve.org/CVERecord?id=CVE-2026-7837","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-7837","label":"security-tracker.debian.org/tracker/CVE-2026-7837","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-05-21T08:14:44.776Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-05-21T12:50:33.383Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":15,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T17:20:14.166Z","stale":false,"partial":false}}