golang.org/x/crypto is vulnerable to invoking server panic during CheckHostKey/Authenticate flow
SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChecker now returns an error instead of panicking when these callbacks are nil.
01
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-39835US | — | — | ||
SSH servers which use CertChecker as a public key callback without setting IsUserAuthority or IsHostAuthority could be caused to panic by a client presenting a certificate. CertChe… | ||||
02
references
External citations — patches, advisories, analysis.
- https://access.redhat.com/errata/RHSA-2026:26546WEB
- https://access.redhat.com/errata/RHSA-2026:26547WEB
- https://access.redhat.com/errata/RHSA-2026:36199WEB
- https://access.redhat.com/errata/RHSA-2026:36207WEB
- https://access.redhat.com/errata/RHSA-2026:36319WEB
- https://access.redhat.com/errata/RHSA-2026:36625WEB
- https://access.redhat.com/errata/RHSA-2026:36648WEB
- https://access.redhat.com/errata/RHSA-2026:36651WEB
scry
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