A gvisor-tap-vsock security update has been released for AlmaLinux 9 to address any issue with golang.org/x/crypto/ssh, addressing a denial of service in the key exchange:

ALSA-2025:3833: gvisor-tap-vsock security update (Important)

ALSA-2025:3833: gvisor-tap-vsock security update (Important)

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AlmaLinux: 9
Type: Security
Severity: Important
Release date: 2025-04-15

Summary:

A replacement for libslirp and VPNKit, written in pure Go. It is based on the network stack of gVisor and is used to provide networking for podman-machine virtual machines. Compared to libslirp, gvisor-tap-vsock brings a configurable DNS server and dynamic port forwarding.

Security Fix(es):

* golang.org/x/crypto/ssh: Denial of Service in the Key Exchange of golang.org/x/crypto/ssh (CVE-2025-22869)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Full details, updated packages, references, and other related information: https://errata.almalinux.org/9/ALSA-2025-3833.html

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Kind regards,
AlmaLinux Team