RHSA-2026:16021 - Security Advisory

Topic

An update for golang is now available for Red Hat Enterprise Linux 9.6 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

The golang packages provide the Go programming language compiler.

Security Fix(es):

• 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)
• golang: cmd/compile: no-op interface conversion bypasses overlap checking (CVE-2026-27144)
• cmd/go: golang: Go (golang) and cmd/go: Arbitrary Code Execution via malicious SWIG file names (CVE-2026-27140)
• golang: cmd/compile: possible memory corruption after bound check elimination (CVE-2026-27143)

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

• Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.6 x86_64
• Red Hat Enterprise Linux Server - AUS 9.6 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.6 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.6 ppc64le
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.6 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.6 x86_64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.6 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.6 s390x
• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.6 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.6 aarch64
• Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.6 ppc64le
• Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.6 s390x

Fixes

• BZ - 2456336 - CVE-2026-32282 golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root
• BZ - 2456338 - CVE-2026-32283 crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages
• BZ - 2456339 - CVE-2026-32280 crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building
• BZ - 2456340 - CVE-2026-27144 golang: cmd/compile: no-op interface conversion bypasses overlap checking
• BZ - 2456341 - CVE-2026-27140 cmd/go: golang: Go (golang) and cmd/go: Arbitrary Code Execution via malicious SWIG file names
• BZ - 2456342 - CVE-2026-27143 golang: cmd/compile: possible memory corruption after bound check elimination

CVEs

• CVE-2026-27140
• CVE-2026-27143
• CVE-2026-27144
• CVE-2026-32280
• CVE-2026-32281
• CVE-2026-32282
• CVE-2026-32283

References

• https://access.redhat.com/security/updates/classification/#important