SB20260731163 - Anolis OS update for golang

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Main Vulnerability Database SB20260731163

SB20260731163 - Anolis OS update for golang

Published: July 31, 2026

Security Bulletin ID SB20260731163
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 75% Low 25%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Resource exhaustion (CVE-ID: CVE-2026-27145)

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 crypto/x509 certificate hostname verification when processing certificates with a large DNS subject alternative name list. A remote attacker can present a specially crafted certificate to cause a denial of service.

The excessive verification cost occurs before the certificate chain is built, so the overhead is incurred even for untrusted certificates.


2) Link following (CVE-ID: CVE-2026-39822)

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to access files outside the intended root directory.

The vulnerability exists due to improper link resolution in os.Root file-opening functions when processing a path whose final component is a symbolic link and the path ends with a trailing slash. A local user can supply a crafted path to access files outside the intended root directory.

This issue affects Unix systems.


3) Information disclosure (CVE-ID: CVE-2026-42505)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to improper information exposure in crypto/tls when performing handshakes that use Encrypted Client Hello. A remote attacker can observe network traffic to disclose sensitive information.

The issue can de-anonymize handshakes by exposing pre-shared key identities in the unencrypted client hello.


4) Improper Output Neutralization for Logs (CVE-ID: CVE-2026-42507)

CWE-ID: CWE-117 - Improper Output Neutralization for Logs

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to inject misleading content into error messages or logs.

The vulnerability exists due to improper output neutralization in the net/textproto package when returning errors that include user-supplied input. A remote attacker can supply crafted input to inject misleading content into error messages or logs.


Remediation

Install update from vendor's website.

References