{"id":"CVE-2026-78662","summary":"Prevent DoS on deadlocked undecided channel in golang.org/x/crypto/ssh","details":"Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection.","aliases":["GO-2026-6354"],"modified":"2026-10-25T17:41:58.202430706Z","published":"2026-09-02T19:37:05.741Z","related":["SUSE-SU-2026:23692-1","SUSE-SU-2026:23712-1","SUSE-SU-2026:23736-1","SUSE-SU-2026:23739-1","SUSE-SU-2026:23745-1","SUSE-SU-2026:23831-1","SUSE-SU-2026:23841-1","SUSE-SU-2026:23874-1","SUSE-SU-2026:23876-1","SUSE-SU-2026:23924-1","SUSE-SU-2026:23973-1","SUSE-SU-2026:23984-1","SUSE-SU-2026:24148-1","SUSE-SU-2026:24213-1","SUSE-SU-2026:4209-1","SUSE-SU-2026:4270-1","SUSE-SU-2026:4272-1","SUSE-SU-2026:4286-1","SUSE-SU-2026:4292-1","SUSE-SU-2026:4293-1","SUSE-SU-2026:4308-1","SUSE-SU-2026:4372-1","SUSE-SU-2026:4392-1","SUSE-SU-2026:4408-1","SUSE-SU-2026:4628-1","openSUSE-SU-2026:11727-1","openSUSE-SU-2026:12241-1","openSUSE-SU-2026:12258-1","openSUSE-SU-2026:12260-1","openSUSE-SU-2026:21801-1","openSUSE-SU-2026:21812-1","openSUSE-SU-2026:21814-1","openSUSE-SU-2026:21816-1","openSUSE-SU-2026:21824-1","openSUSE-SU-2026:21835-1","openSUSE-SU-2026:21841-1","openSUSE-SU-2026:21846-1","openSUSE-SU-2026:21861-1","openSUSE-SU-2026:21879-1","openSUSE-SU-2026:21882-1","openSUSE-SU-2026:21884-1","openSUSE-SU-2026:21924-1","openSUSE-SU-2026:21927-1","openSUSE-SU-2026:21983-1","openSUSE-SU-2026:21999-1","openSUSE-SU-2026:22032-1","openSUSE-SU-2026:22064-1"],"database_specific":{"unresolved_ranges":[{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StandardRange","range":[{"fixed":"0.56.0"}]}]}],"cna_assigner":"Go","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78662.json"},"references":[{"type":"WEB","url":"https://go.dev/cl/826504"},{"type":"WEB","url":"https://go.dev/issue/81316"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/1y3fb2np35U"},{"type":"WEB","url":"https://pkg.go.dev"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2026-6354"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78662.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78662"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/golang/crypto","events":[{"introduced":"0"},{"fixed":"86efde54dc7069251a8b007026c500d28e4239ce"}],"database_specific":{"extracted_events":[{"cpe":"cpe:2.3:a:golang:crypto:*:*:*:*:*:go:*:*","range":[{"introduced":"0"},{"fixed":"0.56.0"}],"source":"CPE_RANGE"}]}}],"versions":["v0.55.0","v0.54.0","v0.53.0","v0.52.0","v0.51.0","v0.50.0","v0.49.0","v0.48.0","v0.47.0","v0.46.0","v0.45.0","v0.44.0","v0.43.0","v0.42.0","v0.41.0","v0.40.0","v0.39.0","v0.38.0","v0.37.0","v0.36.0","v0.35.0","v0.34.0","v0.33.0","v0.32.0","v0.31.0","v0.30.0","v0.29.0","v0.28.0","v0.27.0","v0.26.0","v0.25.0","v0.24.0","v0.23.0","v0.22.0","v0.21.0","v0.20.0","v0.19.0","v0.18.0","v0.17.0","v0.16.0","v0.15.0","v0.14.0","v0.13.0","v0.12.0","v0.11.0","v0.10.0","v0.9.0","v0.8.0","v0.7.0","v0.6.0","v0.5.0","v0.4.0","v0.3.0","v0.2.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-78662.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}