{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102822","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-09-29T17:25:25.265Z","datePublished":"2026-09-29T18:23:28.061Z","dateUpdated":"2026-09-29T19:53:30.291Z"},"containers":{"cna":{"title":"russh: negotiating a MAC-requiring block cipher (CTR/CBC) with mac=none causes a slice-index-out-of-range panic","problemTypes":[{"descriptions":[{"cweId":"CWE-129","lang":"en","description":"CWE-129: Improper Validation of Array Index","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/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-p8qx-h547-fjw9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-p8qx-h547-fjw9"},{"name":"https://github.com/Eugeny/russh/commit/2885385abfee279092a41d80c6cb6ac367353159","tags":["x_refsource_MISC"],"url":"https://github.com/Eugeny/russh/commit/2885385abfee279092a41d80c6cb6ac367353159"},{"name":"https://github.com/Eugeny/russh/releases/tag/v0.63.1","tags":["x_refsource_MISC"],"url":"https://github.com/Eugeny/russh/releases/tag/v0.63.1"}],"affected":[{"vendor":"Eugeny","product":"russh","versions":[{"version":"< 0.63.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-29T18:23:28.061Z"},"descriptions":[{"lang":"en","value":"Russh is a Rust SSH client and server library. Prior to 0.63.1, a connection configured to permit mac=none can negotiate it with a MAC-requiring CTR or CBC block cipher because the selection logic validates needs_mac() only when MAC selection fails. A remote peer can then send a packet with a decrypted length of zero, causing russh/src/cipher/mod.rs to shrink the previously read block before indexing buffer.buffer[16..], which panics and terminates the connection task. This issue is fixed in version 0.63.1."}],"source":{"advisory":"GHSA-p8qx-h547-fjw9","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-p8qx-h547-fjw9","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-29T19:53:03.923621Z","id":"CVE-2026-102822","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":"2026-09-29T19:53:30.291Z"}}]}}