{"id":"CVE-2026-39830","aliases":["GHSA-vgwf-h737-ff37","GO-2026-5017"],"url":"https://o3.security/vulnerability/CVE-2026-39830","summary":"Invoking  client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh","details":"A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a resource leak per connection. Unsolicited global responses are now discarded.","published":"2026-05-22T02:31:27.208Z","modified":"2026-10-24T10:30:43.993243535Z","cvss":{"score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"},"epss":{"score":0.00621,"percentile":0.48233,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"golang.org/x/crypto","fixedVersion":"0.52.0"}],"fix":null,"references":[{"type":"WEB","url":"https://go.dev/cl/781640"},{"type":"WEB","url":"https://go.dev/cl/781664"},{"type":"WEB","url":"https://go.dev/issue/79564"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/a082jnz-LvI"},{"type":"WEB","url":"https://pkg.go.dev"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2026-5017"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39830.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:29455"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:35833"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36199"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36207"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36319"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36625"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36648"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36651"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36796"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36797"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:36808"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37072"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37268"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37271"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37272"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37275"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37278"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37286"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37296"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:37387"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40118"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40262"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40945"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40969"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40972"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40974"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41019"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41031"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41036"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:41066"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42146"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:42796"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:43052"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:43692"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:46885"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:47735"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:48151"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:49944"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:51033"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:52857"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:52910"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:54400"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:54531"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:57194"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:57801"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:59467"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:60520"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:61314"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:65964"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:66022"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:66521"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:67450"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-39830"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39830.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39830"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2480684"},{"type":"PACKAGE","url":"https://cs.opensource.google/go/x/crypto"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T10:30:43.993243535Z"}}