{"cve":"CVE-2026-102822","nvd":{"published":"2026-09-29T19:17:24.190","modified":"2026-09-29T20:17:17.673","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","score":3.7},"cwes":["CWE-129"],"references":["https://github.com/Eugeny/russh/commit/2885385abfee279092a41d80c6cb6ac367353159","https://github.com/Eugeny/russh/releases/tag/v0.63.1","https://github.com/Eugeny/russh/security/advisories/GHSA-p8qx-h547-fjw9","https://github.com/Eugeny/russh/security/advisories/GHSA-p8qx-h547-fjw9"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:56:48.555445741+00:00"},"epss":{"cve":"CVE-2026-102822","score":0.00327,"percentile":0.25504,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-p8qx-h547-fjw9","url":"https://osv.dev/vulnerability/GHSA-p8qx-h547-fjw9","summary":"russh: negotiating a MAC-requiring block cipher (CTR/CBC) with mac=none causes a slice-index-out-of-range panic","modified":"2026-09-30T23:45:04.010001283Z","packages":[{"ecosystem":"crates.io","name":"russh","purl":"pkg:cargo/russh","ranges":["<0.63.1"],"fixed":["0.63.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}