{"id":"CVE-2026-102820","revision":"4062dc47d2104baebcd3889a93cf8b80","records":[{"revision":"4062dc47d2104baebcd3889a93cf8b80","observedAt":"2026-10-25T04:17:26.915+00:00","statement":{"source":"nvd","id":"CVE-2026-102820","aliases":[],"title":"pageant provides a [PageantStream] type that implements [AsyncRead] and [AsyncWrite] traits and can be used to talk to a running Pageant instance. Prior to pageant 0.2.3, the Windows pageant crate's pageant/src/wmmessage.rs MemoryMap::read …","description":"pageant provides a [PageantStream] type that implements [AsyncRead] and [AsyncWrite] traits and can be used to talk to a running Pageant instance. Prior to pageant 0.2.3, the Windows pageant crate's pageant/src/wmmessage.rs MemoryMap::read function trusts a peer-controlled u32 response length supplied through the 8192-byte Pageant shared-memory mapping reached by AgentClient::connect_pageant. A local process that impersonates the Pageant window can make query_pageant_direct allocate up to approximately 4 GiB and copy beyond the mapped view, reliably crashing a russh client and conditionally exposing adjacent committed memory. This issue is fixed in pageant 0.2.3.","state":0,"publishedAt":"2026-09-29T19:17:23.82+00:00","modifiedAt":"2026-09-30T21:17:05.797+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":6.2,"severity":"MEDIUM"}],"references":["https://github.com/Eugeny/russh/commit/5d566989ebabfdebfe6b33243d31765a0812260b","https://github.com/Eugeny/russh/releases/tag/v0.63.2","https://github.com/Eugeny/russh/security/advisories/GHSA-g4mp-vgx3-xrvm"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102820","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-125","CWE-789"],"productCriteria":[],"sourceDates":{"published":"2026-09-29T19:17:23.820","lastModified":"2026-09-30T21:17:05.797"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-102820","identifiers":["CVE-2026-102820"]},"retained":false,"historicalAffected":[]}],"coverage":[]}