SB2026073168 - Red Hat Enterprise Linux 9 update for golang
Published: July 31, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 vulnerabilities.
1) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2026-32282)
CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to modify file permissions outside the intended root directory.
The vulnerability exists due to improper access control in Root.Chmod and internal/syscall/unix Fchmodat when handling a chmod operation on Linux. A local user can replace the target with a symlink during the check-and-operation window to modify file permissions outside the intended root directory.
Exploitation requires a race condition in which the target is swapped with a symlink while the chmod operation is in progress.
2) Dependency on vulnerable third-party component (CVE-ID: CVE-2026-32283)
CWE-ID: CWE-1395 - Dependency on Vulnerable Third-Party Component
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to dependency on a vulnerable third-party component in the Go standard library used by Fleet Server when handling network input. A remote attacker can send a specially crafted payload to cause a denial of service.
All configurations are affected.
3) Resource exhaustion (CVE-ID: CVE-2026-32280)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in the Certificate.Verify chain-building logic in crypto/x509 when processing a large number of intermediate certificates supplied through VerifyOptions.Intermediates. A remote attacker can provide a large number of intermediate certificates to cause a denial of service.
This affects both direct users of crypto/x509 and users of crypto/tls.
4) Buffer overflow (CVE-ID: CVE-2026-27144)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause memory corruption at runtime.
The vulnerability exists due to memory corruption in cmd/compile when compiling code involving a no-op interface conversion on pointers used as operands of a memory move. A local user can compile specially crafted code to cause memory corruption at runtime.
5) Protection mechanism failure (CVE-ID: CVE-2026-27140)
CWE-ID: CWE-693 - Protection Mechanism Failure
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to a trust layer bypass in cmd/go when processing SWIG file names containing 'cgo' and crafted payloads at build time. A remote attacker can supply a specially crafted SWIG file to execute arbitrary code.
6) Integer overflow (CVE-ID: CVE-2026-27143)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause memory corruption.
The vulnerability exists due to integer overflow in cmd/compile when optimizing arithmetic over induction variables in loops. A local user can compile specially crafted code to cause memory corruption.
The issue can result in invalid indexing at runtime.
Remediation
Install update from vendor's website.