{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-111061", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-15T12:47:13.665Z", "datePublished": "2026-10-19T16:30:24.445Z", "dateUpdated": "2026-10-19T18:29:47.486Z"}, "containers": {"cna": {"title": "russh agent server converts constraint records into unbounded never-rolled-back tasks", "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "LOW", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/Eugeny/russh/security/advisories/GHSA-4wc5-f2rc-q74m", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/Eugeny/russh/security/advisories/GHSA-4wc5-f2rc-q74m"}, {"name": "https://github.com/Eugeny/russh/commit/4c305033d72f8e5dd21a3fd4c53a6c291a16ebd1", "tags": ["x_refsource_MISC"], "url": "https://github.com/Eugeny/russh/commit/4c305033d72f8e5dd21a3fd4c53a6c291a16ebd1"}, {"name": "https://github.com/Eugeny/russh/releases/tag/v0.64.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/Eugeny/russh/releases/tag/v0.64.1"}], "affected": [{"vendor": "Eugeny", "product": "russh", "versions": [{"version": "< 0.64.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-19T16:30:54.207Z"}, "descriptions": [{"lang": "en", "value": "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."}], "source": {"advisory": "GHSA-4wc5-f2rc-q74m", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/Eugeny/russh/security/advisories/GHSA-4wc5-f2rc-q74m", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-10-19T18:29:25.468418Z", "id": "CVE-2026-111061", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T18:29:47.486Z"}}]}}

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{"bugzilla": {"description": "russh: russh: Denial of Service via resource exhaustion in SSH agent", "id": "2555709", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555709"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-770", "details": ["A flaw was found in russh. When processing key addition requests containing lifetime constraints, the Secure Shell (SSH) agent server spawns a separate long-lived task for repeated constraint records and fails to roll back tasks if subsequent parsing fails. An attacker capable of communicating with the SSH agent locally or through agent forwarding can exploit this vulnerability to exhaust system memory and tasks. This can cause the agent process to become unresponsive or terminate unexpectedly, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-111061", "package_state": [{"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "openshell", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-10-19T16:30:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-111061\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-111061\nhttps://github.com/Eugeny/russh/commit/4c305033d72f8e5dd21a3fd4c53a6c291a16ebd1\nhttps://github.com/Eugeny/russh/releases/tag/v0.64.1\nhttps://github.com/Eugeny/russh/security/advisories/GHSA-4wc5-f2rc-q74m"], "threat_severity": "Moderate"}