Summary
Go Toolset provides the Go programming language tools and libraries. Go is alternatively known as golang.
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.
Fixed packages 9
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 8 | delve | 1.25.2-1.module_el8.10.0+4074+24330916 |
| AlmaLinux · 8 | go-toolset | 1.25.9-1.module_el8.10.0+4167+2e2e20dd |
| AlmaLinux · 8 | golang | 1.25.9-1.module_el8.10.0+4167+2e2e20dd |
| AlmaLinux · 8 | golang-bin | 1.25.9-1.module_el8.10.0+4167+2e2e20dd |
| AlmaLinux · 8 | golang-docs | 1.25.9-1.module_el8.10.0+4167+2e2e20dd |
| AlmaLinux · 8 | golang-misc | 1.25.9-1.module_el8.10.0+4167+2e2e20dd |
| AlmaLinux · 8 | golang-race | 1.25.9-1.module_el8.10.0+4167+2e2e20dd |
| AlmaLinux · 8 | golang-src | 1.25.9-1.module_el8.10.0+4167+2e2e20dd |
| AlmaLinux · 8 | golang-tests | 1.25.9-1.module_el8.10.0+4167+2e2e20dd |
Vulnerabilities 6
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Critical 9.8
Missing bound checks can lead to memory corruption in safe Go in cmd/compile
Arithmetic over induction variables in loops were not correctly checked for underflow or overflow. As a result, the compiler would allow for invalid indexing to occur at runtime, potentially leading to memory corruption.
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High 8.8
Code execution vulnerability in SWIG code generation in cmd/go
SWIG file names containing 'cgo' and well-crafted payloads could lead to code smuggling and arbitrary code execution at build time due to trust layer bypass.
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High 7.5
Unexpected work during chain building in crypto/x509
During chain building, the amount of work that is done is not correctly limited when a large number of intermediate certificates are passed in VerifyOptions.Intermediates, which can lead to a denial of service. This affects both direct users of crypto/x509 an…
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High 7.5
Unauthenticated TLS 1.3 KeyUpdate record can cause persistent connection retention and DoS in crypto/tls
If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects TLS 1.3.
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High 7.1
Miscompilation allows memory corruption via CONVNOP-wrapped array copy in cmd/compile
The compiler is meant to unwrap pointers which are the operands of a memory move; a no-op interface conversion prevented the compiler from making the correct determination about non-overlapping moves, potentially leading to memory corruption at runtime.
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Medium 6.4
TOCTOU permits root escape on Linux via Root.Chmod in os in internal/syscall/unix
On Linux, if the target of Root.Chmod is replaced with a symlink while the chmod operation is in progress, Chmod can operate on the target of the symlink, even when the target lies outside the root. The Linux fchmodat syscall silently ignores the AT_SYMLINK_N…
References
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report
https://access.redhat.com/security/cve/CVE-2026-27140
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report
https://access.redhat.com/security/cve/CVE-2026-27143
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report
https://access.redhat.com/security/cve/CVE-2026-27144
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report
https://access.redhat.com/security/cve/CVE-2026-32280
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report
https://access.redhat.com/security/cve/CVE-2026-32282
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report
https://access.redhat.com/security/cve/CVE-2026-32283
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report
https://bugzilla.redhat.com/2456336
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report
https://bugzilla.redhat.com/2456339
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report
https://bugzilla.redhat.com/2456340
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report
https://bugzilla.redhat.com/2456341
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report
https://bugzilla.redhat.com/2456342
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advisory
https://errata.almalinux.org/8/ALSA-2026-10704.html