SB2026062633 - Anolis OS update for gnutls

Description

This security bulletin contains information about 2 vulnerabilities.

1) Heap-based buffer overflow (CVE-ID: CVE-2026-33846)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

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 heap overwrite.

The vulnerability exists due to a heap-based buffer overflow in DTLS fragment handling when processing inconsistent DTLS fragments. A remote attacker can send specially crafted DTLS fragments to cause a heap overwrite.

2) Improper Certificate Validation (CVE-ID: CVE-2026-3833)

CWE-ID: CWE-295 - Improper Certificate Validation

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 bypass name constraints validation.

The vulnerability exists due to improper certificate validation in name constraints processing when comparing domain names in certificates. A remote attacker can present a specially crafted certificate to bypass name constraints validation.

This issue affects excluded name constraints because domain name comparison was performed case-sensitively, contrary to RFC 5280 section 7.2.

Remediation

Install update from vendor's website.

References

• https://anas.openanolis.cn/errata/detail/ANSA-2026:0860