ESB-2026.5107

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.5107 gvisor-tap-vsock security update 14 May 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: gvisor-tap-vsock Publisher: Red Hat Operating System: Red Hat Resolution: Patch/Upgrade CVE Names: CVE-2025-61726 CVE-2025-68121 CVE-2026-32280 CVE-2026-32282 CVE-2026-25679 CVE-2026-32283 CVE-2025-61729 Original Bulletin: https://access.redhat.com/errata/RHSA-2026:17084 Comment: CVSS (Max): 7.8 CVE-2026-32282 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H) CVSS Source: Red Hat Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H EPSS (Max): 0.0% (13th) CVE-2026-25679 2026-05-13 - --------------------------BEGIN INCLUDED TEXT-------------------- RHSA-2026:17084 - Security Advisory Issued: 2026-05-13 Updated: 2026-05-13 Synopsis 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): o crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate (CVE-2025-61729) o golang: net/url: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) o crypto/tls: Unexpected session resumption in crypto/tls (CVE-2025-68121) o net/url: Incorrect parsing of IPv6 host literals in net/url (CVE-2026-25679) o golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root (CVE-2026-32282) o crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages (CVE-2026-32283) o 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 o Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.0 x86_64 o Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.0 s390x o Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.0 ppc64le o Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.0 aarch64 o Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.0 aarch64 o Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.0 s390x o Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.0 ppc64le o Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.0 x86_64 Fixes o BZ - 2418462 - CVE-2025-61729 crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate o BZ - 2434432 - CVE-2025-61726 golang: net/url: Memory exhaustion in query parameter parsing in net/url o BZ - 2437111 - CVE-2025-68121 crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption o BZ - 2445356 - CVE-2026-25679 net/url: Incorrect parsing of IPv6 host literals in net/url o BZ - 2456336 - CVE-2026-32282 golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root o BZ - 2456338 - CVE-2026-32283 crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages o BZ - 2456339 - CVE-2026-32280 crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building CVEs o CVE-2025-61726 o CVE-2025-61729 o CVE-2025-68121 o CVE-2026-25679 o CVE-2026-32280 o CVE-2026-32282 o CVE-2026-32283 References o https://access.redhat.com/security/updates/classification/#important - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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