Issued:
2026-05-13
Updated:
2026-05-13

RHSA-2026:17084 - Important: gvisor-tap-vsock security update

Synopsis

Important: gvisor-tap-vsock security update

Type/Severity

Security Advisory Important

Topic

An update for gvisor-tap-vsock is now available for Red Hat Enterprise Linux 10.0 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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

Security Fix(es):

  • crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate (CVE-2025-61729)

  • golang: net/url: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726)

  • crypto/tls: Unexpected session resumption in crypto/tls (CVE-2025-68121)

  • net/url: Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679)

  • golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root (CVE-2026-32282)

  • crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283)

  • crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280)

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Update Support10.0x86_64
Red Hat Enterprise Linux for x86_64 - 4 years of updates10.0x86_64
Red Hat Enterprise Linux for Power, little endian - Extended Update Support10.0ppc64le
Red Hat Enterprise Linux for Power, little endian - 4 years of support10.0ppc64le
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support10.0s390x
Red Hat Enterprise Linux for IBM z Systems - 4 years of updates10.0s390x
Red Hat Enterprise Linux for ARM 64 - Extended Update Support10.0aarch64
Red Hat Enterprise Linux for ARM 64 - 4 years of updates10.0aarch64

Updated Packages

  • gvisor-tap-vsock-gvforwarder-0.8.5-2.el10_0.1.ppc64le.rpm
  • gvisor-tap-vsock-debugsource-0.8.5-2.el10_0.1.x86_64.rpm
  • gvisor-tap-vsock-gvforwarder-0.8.5-2.el10_0.1.x86_64.rpm
  • gvisor-tap-vsock-debuginfo-0.8.5-2.el10_0.1.ppc64le.rpm
  • gvisor-tap-vsock-0.8.5-2.el10_0.1.s390x.rpm
  • gvisor-tap-vsock-debugsource-0.8.5-2.el10_0.1.aarch64.rpm
  • gvisor-tap-vsock-debugsource-0.8.5-2.el10_0.1.ppc64le.rpm
  • gvisor-tap-vsock-0.8.5-2.el10_0.1.x86_64.rpm
  • gvisor-tap-vsock-debuginfo-0.8.5-2.el10_0.1.x86_64.rpm
  • gvisor-tap-vsock-0.8.5-2.el10_0.1.ppc64le.rpm
  • gvisor-tap-vsock-debuginfo-0.8.5-2.el10_0.1.s390x.rpm
  • gvisor-tap-vsock-debuginfo-0.8.5-2.el10_0.1.aarch64.rpm
  • gvisor-tap-vsock-gvforwarder-debuginfo-0.8.5-2.el10_0.1.aarch64.rpm
  • gvisor-tap-vsock-gvforwarder-debuginfo-0.8.5-2.el10_0.1.ppc64le.rpm
  • gvisor-tap-vsock-gvforwarder-debuginfo-0.8.5-2.el10_0.1.s390x.rpm
  • gvisor-tap-vsock-0.8.5-2.el10_0.1.src.rpm
  • gvisor-tap-vsock-debugsource-0.8.5-2.el10_0.1.s390x.rpm
  • gvisor-tap-vsock-0.8.5-2.el10_0.1.aarch64.rpm
  • gvisor-tap-vsock-gvforwarder-0.8.5-2.el10_0.1.s390x.rpm
  • gvisor-tap-vsock-gvforwarder-debuginfo-0.8.5-2.el10_0.1.x86_64.rpm
  • gvisor-tap-vsock-gvforwarder-0.8.5-2.el10_0.1.aarch64.rpm

Fixes

CVEs

References

Additional information