Red Hat Security Advisory: gvisor-tap-vsock security update
This Red Hat security advisory addresses multiple vulnerabilities in gvisor-tap-vsock, a Go-based replacement for libslirp and VPNKit used in Red Hat Enterprise Linux 10. 0 Extended Update Support. The vulnerabilities include denial of service via crafted certificates and TLS key update messages, memory exhaustion during URL query parsing, incorrect IPv6 host literal parsing, symlink traversal in file permission changes, and unexpected TLS session resumption. These issues collectively pose risks of resource exhaustion, incorrect network behavior, and potential privilege escalation. The update is rated as Important by Red Hat Product Security and affects several architectures supported by Red Hat Enterprise Linux 10. 0 EUS. A security update is available to address these issues, and users are advised to apply it according to Red Hat's guidance.
AI Analysis
Technical Summary
The advisory covers seven security fixes in gvisor-tap-vsock, a Go-based network stack component for Red Hat Enterprise Linux 10.0 EUS. The fixed vulnerabilities include: CVE-2025-61729 (DoS via crafted certificate in crypto/x509), CVE-2025-61726 (memory exhaustion in net/url query parsing), CVE-2025-68121 (unexpected TLS session resumption), CVE-2026-25679 (incorrect IPv6 host literal parsing), CVE-2026-32282 (Root.Chmod following symlinks out of root), CVE-2026-32283 (DoS via multiple TLS 1.3 key update messages), and CVE-2026-32280 (DoS in certificate chain building). These vulnerabilities affect resource consumption, parsing correctness, and security boundary enforcement in the gvisor-tap-vsock component. Red Hat has released updated packages for multiple architectures to remediate these issues.
Potential Impact
The vulnerabilities can lead to denial of service conditions through excessive resource consumption or memory exhaustion, incorrect network parsing potentially affecting connectivity or security, and security boundary bypass via symlink traversal. Unexpected TLS session resumption may cause incorrect certificate validation states. These impacts could disrupt network services or degrade system reliability on affected Red Hat Enterprise Linux 10.0 EUS systems running gvisor-tap-vsock.
Mitigation Recommendations
Red Hat has released updated gvisor-tap-vsock packages for Red Hat Enterprise Linux 10.0 Extended Update Support to address these vulnerabilities. Users should apply the security update as described in the Red Hat advisory RHSA-2026:17084 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.
Red Hat Security Advisory: gvisor-tap-vsock security update
Description
This Red Hat security advisory addresses multiple vulnerabilities in gvisor-tap-vsock, a Go-based replacement for libslirp and VPNKit used in Red Hat Enterprise Linux 10. 0 Extended Update Support. The vulnerabilities include denial of service via crafted certificates and TLS key update messages, memory exhaustion during URL query parsing, incorrect IPv6 host literal parsing, symlink traversal in file permission changes, and unexpected TLS session resumption. These issues collectively pose risks of resource exhaustion, incorrect network behavior, and potential privilege escalation. The update is rated as Important by Red Hat Product Security and affects several architectures supported by Red Hat Enterprise Linux 10. 0 EUS. A security update is available to address these issues, and users are advised to apply it according to Red Hat's guidance.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The advisory covers seven security fixes in gvisor-tap-vsock, a Go-based network stack component for Red Hat Enterprise Linux 10.0 EUS. The fixed vulnerabilities include: CVE-2025-61729 (DoS via crafted certificate in crypto/x509), CVE-2025-61726 (memory exhaustion in net/url query parsing), CVE-2025-68121 (unexpected TLS session resumption), CVE-2026-25679 (incorrect IPv6 host literal parsing), CVE-2026-32282 (Root.Chmod following symlinks out of root), CVE-2026-32283 (DoS via multiple TLS 1.3 key update messages), and CVE-2026-32280 (DoS in certificate chain building). These vulnerabilities affect resource consumption, parsing correctness, and security boundary enforcement in the gvisor-tap-vsock component. Red Hat has released updated packages for multiple architectures to remediate these issues.
Potential Impact
The vulnerabilities can lead to denial of service conditions through excessive resource consumption or memory exhaustion, incorrect network parsing potentially affecting connectivity or security, and security boundary bypass via symlink traversal. Unexpected TLS session resumption may cause incorrect certificate validation states. These impacts could disrupt network services or degrade system reliability on affected Red Hat Enterprise Linux 10.0 EUS systems running gvisor-tap-vsock.
Mitigation Recommendations
Red Hat has released updated gvisor-tap-vsock packages for Red Hat Enterprise Linux 10.0 Extended Update Support to address these vulnerabilities. Users should apply the security update as described in the Red Hat advisory RHSA-2026:17084 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:17084
- Cve Count
- 7
- Additional Cves
- ["CVE-2025-61729","CVE-2025-68121","CVE-2026-25679","CVE-2026-32280","CVE-2026-32282","CVE-2026-32283"]
- Cvss Version
- null
Threat ID: 6a16096ce29bf47b50632cd8
Added to database: 5/26/2026, 8:58:20 PM
Last enriched: 5/26/2026, 9:48:04 PM
Last updated: 5/27/2026, 4:50:44 AM
Views: 2
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