RLSA-2026:98610: Important: gvisor-tap-vsock security update
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):
encoding/asn1: golang: Go encoding/asn1: Denial of Service via excessive recursion in Unmarshal (CVE-2026-33818)
net/http: golang: Go net/http: Unencrypted HTTP/2 connections vulnerable to Denial of Service (CVE-2026-56853)
crypto/tls: golang: Golang crypto/tls: Denial of Service via indefinite KeyUpdate messages (CVE-2026-56862)
net/http: golang: golang: Denial of Service via crafted HTTP Range headers (CVE-2026-78667)
crypto/tls: golang: crypto/tls: Denial of Service via multiple ECH outer extension references (CVE-2026-97031)
net/textproto: mime/multipart: golang: golang: Denial of Service via memory limit bypass in multipart form parsing (CVE-2026-94440)
crypto/x509: golang: crypto/x509: Man-in-the-middle attacks via untrusted intermediate certificates (CVE-2026-111943)
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
rocky-linux/gvisor-tap-vsock-debugsourceto a version that resolves this vulnerability.Fixed in 6:0.8.7-2.el10_3 - Upgrade
Upgrade
rocky-linux/gvisor-tap-vsock-gvforwarder-debuginfoto a version that resolves this vulnerability.Fixed in 6:0.8.7-2.el10_3 - Upgrade
Upgrade
rocky-linux/gvisor-tap-vsockto a version that resolves this vulnerability.Fixed in 6:0.8.7-2.el10_3 - Upgrade
Upgrade
rocky-linux/gvisor-tap-vsock-gvforwarderto a version that resolves this vulnerability.Fixed in 6:0.8.7-2.el10_3 - Upgrade
Upgrade
rocky-linux/gvisor-tap-vsock-debuginfoto a version that resolves this vulnerability.Fixed in 6:0.8.7-2.el10_3
Event History
Child vulnerabilities
Contains the following vulnerabilities.
Frequently Asked Questions
Does exploitation require authentication or user interaction?
The supplied severity vector indicates network-based exploitation with low attack complexity, no privileges required, and no user interaction required. It indicates high availability impact and no stated confidentiality or integrity impact.
Which installed packages should be included when assessing systems?
The advisory lists gvisor-tap-vsock and gvisor-tap-vsock-gvforwarder, along with their debuginfo and debugsource packages. Inventory these listed package names on Rocky Linux systems.
Can this record determine whether a particular installed version is affected or fixed?
No. The provided data does not include affected version ranges or a fixed package version, so installed-version status cannot be determined from this record alone.