{"id":"CVE-2026-102822","title":"Russh is a Rust SSH client and server library","summary":"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 sele…","severity":"low","cvss":3.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","cwe":["CWE-129"],"vendor":"Eugeny","product":"russh","affected":["russh < 0.63.1"],"published":"2026-09-29","updated":"2026-09-29","sourceUpdated":"2026-09-29T20:17:17.673","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102822","references":[{"url":"https://github.com/Eugeny/russh/commit/2885385abfee279092a41d80c6cb6ac367353159","label":"security-advisories@github.com"},{"url":"https://github.com/Eugeny/russh/releases/tag/v0.63.1","label":"security-advisories@github.com"},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-p8qx-h547-fjw9","label":"security-advisories@github.com"},{"url":"https://github.com/Eugeny/russh/security/advisories/GHSA-p8qx-h547-fjw9","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-29T19:53:03.923621Z"},"ingestedAt":"2026-09-29T18:42:35.835Z","slug":"CVE-2026-102822","body":"## Overview\n\nRussh 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":32,"depthScoreParts":{"impact":20.4,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":213129,"id":"CVE-2026-102822","ts":1790714825265,"field":"exploit_available","old":"false","new":"true"}]}