{"items":[{"id":"NVI-00012142","kind":"vulnerability","title":"russh: Unbounded memory allocation in agent protocol server via crafted constraint records","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-4wc5-f2rc-q74m","CVE-2026-111061"],"plain_summary":"GitHub lists this reviewed advisory for russh. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-0d7c03e55c95c991ab658aec40822319"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-19T17:06:48.000Z","value":"4.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-b59c35a865f3c6769c31459a8f7edb4a"},{"kind":"CVSS","as_of":"2026-10-19T19:17:22.890Z","value":"4.3 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-2b32496e00fa02dddfa4ef06f0c08dd0"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.347%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.28302. Missing scores are unknown.","source_id":"sr-0d7c03e55c95c991ab658aec40822319"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-b59c35a865f3c6769c31459a8f7edb4a","url":"https://github.com/advisories/GHSA-4wc5-f2rc-q74m","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-4wc5-f2rc-q74m","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:14.588Z"},{"id":"sr-2b32496e00fa02dddfa4ef06f0c08dd0","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111061","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-111061","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:58:37.778Z"},{"id":"sr-0d7c03e55c95c991ab658aec40822319","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-111061","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.066Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b59c35a865f3c6769c31459a8f7edb4a"],"technology":"russh","known_exclusions":[],"conditions_summary":"### Summary\n\n`russh_keys::agent::server::add_key` (`russh/src/keys/agent/server.rs:271-319`) spawns a dedicated tokio task for every 5-byte `SSH_AGENT_CONSTRAIN_LIFETIME` record attached to an added key, each cloning the key blob and sleeping for the declared lifetime (up to ~136 years). The loop has no per-request task budget, and spawned tasks are not rolled back when the overall request fails. Repeating one constrained add-key message over an agent connection converts wire bytes into resident tasks and heap at roughly 141x amplification: in our measurement 10.2 MiB of protocol traffic produced ~2,096,120 live tasks and +1,447,856 KiB RSS, while the same traffic sent as unconstrained add-key requests cost +268 KiB. An attacker reaching the agent socket (a local process, or a remote SSH server the user connects to with agent forwarding, since russh clients accept the `auth-agent@openssh.com` channel by default at `russh/src/client/mod.rs:2686`) can exhaust the agent process's memory and task capacity with a renewable, cheap request stream. Verified on russh HEAD efa9a03 (v0.63.3-10, 2026-10-01).\n\n\n### Details\n\n```rust\n// russh/src/keys/agent/server.rs:271-319 (add_key, constraint ","public_affected_ranges":["<= 0.64.0"]}],"null_published_at":"2026-11-03T10:03:31.388Z","source_updated_at":"2026-10-19T17:06:48.000Z","source_disclosed_at":"2026-10-19T17:06:46.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T23:14:14.588Z"},{"id":"NVI-00012142","kind":"vulnerability","title":"russh: Unbounded memory allocation in agent protocol server via crafted constraint records","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-4wc5-f2rc-q74m","CVE-2026-111061"],"plain_summary":"GitHub lists this reviewed advisory for russh. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-0d7c03e55c95c991ab658aec40822319"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-19T17:06:48.000Z","value":"4.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-b59c35a865f3c6769c31459a8f7edb4a"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.347%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.28302. Missing scores are unknown.","source_id":"sr-0d7c03e55c95c991ab658aec40822319"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-b59c35a865f3c6769c31459a8f7edb4a","url":"https://github.com/advisories/GHSA-4wc5-f2rc-q74m","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-4wc5-f2rc-q74m","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:14.588Z"},{"id":"sr-0d7c03e55c95c991ab658aec40822319","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-111061","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.066Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b59c35a865f3c6769c31459a8f7edb4a"],"technology":"russh","known_exclusions":[],"conditions_summary":"### Summary\n\n`russh_keys::agent::server::add_key` (`russh/src/keys/agent/server.rs:271-319`) spawns a dedicated tokio task for every 5-byte `SSH_AGENT_CONSTRAIN_LIFETIME` record attached to an added key, each cloning the key blob and sleeping for the declared lifetime (up to ~136 years). The loop has no per-request task budget, and spawned tasks are not rolled back when the overall request fails. Repeating one constrained add-key message over an agent connection converts wire bytes into resident tasks and heap at roughly 141x amplification: in our measurement 10.2 MiB of protocol traffic produced ~2,096,120 live tasks and +1,447,856 KiB RSS, while the same traffic sent as unconstrained add-key requests cost +268 KiB. An attacker reaching the agent socket (a local process, or a remote SSH server the user connects to with agent forwarding, since russh clients accept the `auth-agent@openssh.com` channel by default at `russh/src/client/mod.rs:2686`) can exhaust the agent process's memory and task capacity with a renewable, cheap request stream. Verified on russh HEAD efa9a03 (v0.63.3-10, 2026-10-01).\n\n\n### Details\n\n```rust\n// russh/src/keys/agent/server.rs:271-319 (add_key, constraint ","public_affected_ranges":["<= 0.64.0"]}],"null_published_at":"2026-11-01T14:34:14.097Z","source_updated_at":"2026-10-19T17:06:48.000Z","source_disclosed_at":"2026-10-19T17:06:46.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T23:14:14.588Z"},{"id":"NVI-00012142","kind":"vulnerability","title":"russh: Unbounded memory allocation in agent protocol server via crafted constraint records","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-4wc5-f2rc-q74m","CVE-2026-111061"],"plain_summary":"GitHub lists this reviewed advisory for russh. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-b59c35a865f3c6769c31459a8f7edb4a"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-19T17:06:48.000Z","value":"4.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-b59c35a865f3c6769c31459a8f7edb4a"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-b59c35a865f3c6769c31459a8f7edb4a","url":"https://github.com/advisories/GHSA-4wc5-f2rc-q74m","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-4wc5-f2rc-q74m","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:14:14.588Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b59c35a865f3c6769c31459a8f7edb4a"],"technology":"russh","known_exclusions":[],"conditions_summary":"### Summary\n\n`russh_keys::agent::server::add_key` (`russh/src/keys/agent/server.rs:271-319`) spawns a dedicated tokio task for every 5-byte `SSH_AGENT_CONSTRAIN_LIFETIME` record attached to an added key, each cloning the key blob and sleeping for the declared lifetime (up to ~136 years). The loop has no per-request task budget, and spawned tasks are not rolled back when the overall request fails. Repeating one constrained add-key message over an agent connection converts wire bytes into resident tasks and heap at roughly 141x amplification: in our measurement 10.2 MiB of protocol traffic produced ~2,096,120 live tasks and +1,447,856 KiB RSS, while the same traffic sent as unconstrained add-key requests cost +268 KiB. An attacker reaching the agent socket (a local process, or a remote SSH server the user connects to with agent forwarding, since russh clients accept the `auth-agent@openssh.com` channel by default at `russh/src/client/mod.rs:2686`) can exhaust the agent process's memory and task capacity with a renewable, cheap request stream. Verified on russh HEAD efa9a03 (v0.63.3-10, 2026-10-01).\n\n\n### Details\n\n```rust\n// russh/src/keys/agent/server.rs:271-319 (add_key, constraint ","public_affected_ranges":["<= 0.64.0"]}],"null_published_at":"2026-11-01T01:04:01.245Z","source_updated_at":"2026-10-19T17:06:48.000Z","source_disclosed_at":"2026-10-19T17:06:46.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T23:14:14.588Z"}],"next_cursor":null,"snapshot_revision":"42594"}