{"id":"CVE-2026-102822","published":"2026-09-29T19:17:24.190","lastModified":"2026-09-29T20:17:17.673","description":"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.","cvssScore":3.7,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","cwes":["CWE-129"],"vendors":[],"products":[],"references":[{"url":"https://github.com/Eugeny/russh/commit/2885385abfee279092a41d80c6cb6ac367353159","tags":[]},{"url":"https://github.com/Eugeny/russh/releases/tag/v0.63.1","tags":[]},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-p8qx-h547-fjw9","tags":[]},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-p8qx-h547-fjw9","tags":[]}],"exploitRefs":[{"url":"https://github.com/Eugeny/russh/commit/2885385abfee279092a41d80c6cb6ac367353159","tags":[]},{"url":"https://github.com/Eugeny/russh/releases/tag/v0.63.1","tags":[]},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-p8qx-h547-fjw9","tags":[]},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-p8qx-h547-fjw9","tags":[]}],"hasPoc":true,"ai":null}