{"id":"CVE-2026-102820","published":"2026-09-29T19:17:23.820","lastModified":"2026-09-29T19:17:23.820","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.","cvssScore":6.2,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-125","CWE-789"],"vendors":[],"products":[],"references":[{"url":"https://github.com/Eugeny/russh/commit/5d566989ebabfdebfe6b33243d31765a0812260b","tags":[]},{"url":"https://github.com/Eugeny/russh/releases/tag/v0.63.2","tags":[]},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-g4mp-vgx3-xrvm","tags":[]}],"exploitRefs":[{"url":"https://github.com/Eugeny/russh/commit/5d566989ebabfdebfe6b33243d31765a0812260b","tags":[]},{"url":"https://github.com/Eugeny/russh/releases/tag/v0.63.2","tags":[]},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-g4mp-vgx3-xrvm","tags":[]}],"hasPoc":true,"ai":null}