CVE-2026-102820

{"id": "CVE-2026-102820", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-102820", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-30T20:11:00.619637Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.2, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.5}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "Eugeny", "product": "russh", "versions": [{"status": "affected", "version": "< 0.63.2"}]}, {"vendor": "rust", "product": "pageant", "versions": [{"status": "affected", "version": "< 0.2.3"}]}]}], "published": "2026-09-29T19:17:23.820", "references": [{"url": "https://github.com/Eugeny/russh/commit/5d566989ebabfdebfe6b33243d31765a0812260b", "source": "security-advisories@github.com"}, {"url": "https://github.com/Eugeny/russh/releases/tag/v0.63.2", "source": "security-advisories@github.com"}, {"url": "https://github.com/Eugeny/russh/security/advisories/GHSA-g4mp-vgx3-xrvm", "source": "security-advisories@github.com"}, {"url": "https://github.com/Eugeny/russh/security/advisories/GHSA-g4mp-vgx3-xrvm", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-789"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-09-30T21:17:05.797", "sourceIdentifier": "security-advisories@github.com"}