{"schemaVersion":3,"id":"CVE-2026-111061","aliases":["GHSA-4wc5-f2rc-q74m","DEBIAN-CVE-2026-111061","CGA-6vhp-rr8f-gg8f"],"status":"published","duplicateOf":null,"title":null,"description":"russh is a Rust SSH client and server library that includes an SSH agent protocol implementation. Prior to 0.64.1, the agent server spawns a separate long-lived task for every SSH_AGENT_CONSTRAIN_LIFETIME record in a constrained add-key request. The loop accepts repeated lifetime records, clones the key blob into each task, and does not roll back tasks when later constraint parsing fails. An attacker that can speak the agent protocol locally or through agent forwarding can exhaust memory and tasks until the agent process is starved or terminated, denying SSH agent service. This issue is fixed in version 0.64.1.","dates":{"published":"2026-10-19T16:30:24.445Z","modified":"2026-10-19T18:29:47.486Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":4.3,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Crates.io","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":7.2,"impact":2.3,"computed":true}]},"epss":{"probability":0.00346,"percentile":0.26779,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-20T00:00:00.000Z","score":0.00346,"percentile":0.26779}],"last30":[{"date":"2026-10-20T00:00:00.000Z","score":0.00346,"percentile":0.26779}]},"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-770","name":"Allocation of Resources Without Limits or Throttling","description":"The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/770.html"}],"affected":[{"vendor":"chainguard","product":"yazi","name":"yazi","label":"yazi","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/yazi","purlType":"apk","versions":[{"text":"< 26.9.1-r5","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 26.9.1-r5","eol":null,"hubHref":null},{"vendor":"wolfi","product":"yazi","name":"yazi","label":"yazi","ecosystem":"Wolfi","cpePart":null,"purl":"pkg:apk/wolfi/yazi","purlType":"apk","versions":[{"text":"< 26.9.1-r5","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 26.9.1-r5","eol":null,"hubHref":null},{"vendor":"Crates.Io","product":"russh","name":"russh","label":"russh","ecosystem":"Crates.Io","cpePart":null,"purl":"pkg:cargo/russh","purlType":"cargo","versions":[{"text":"< 0.64.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.64.1","eol":null,"hubHref":null},{"vendor":"debian","product":"rust-russh","name":"rust-russh","label":"rust-russh","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/rust-russh","purlType":"deb","versions":[{"text":"< 0.64.1-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.64.1-1","eol":null,"hubHref":null},{"vendor":"eugeny","product":"russh","name":"russh","label":"russh","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 0.64.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.64.1","eol":null,"hubHref":"/vendor/eugeny/russh"}],"affectedCount":5,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-4wc5-f2rc-q74m","label":"github.com/Eugeny/russh/security/advisories/GHSA-4wc5-f2rc-q74m","hostname":"github.com","tags":["X Refsource CONFIRM","WEB"]},{"url":"https://github.com/Eugeny/russh/commit/4c305033d72f8e5dd21a3fd4c53a6c291a16ebd1","label":"github.com/Eugeny/russh/commit/4c305033d72f8e5dd21a3fd4c53a6c291a16ebd1","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://github.com/Eugeny/russh/releases/tag/v0.64.1","label":"github.com/Eugeny/russh/releases/tag/v0.64.1","hostname":"github.com","tags":["X Refsource 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