OESA-2026-2404

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Source

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-2404

Import Source

https://repo.openeuler.org/security/data/osv/OESA-2026-2404.json

JSON Data

https://api.osv.dev/v1/vulns/OESA-2026-2404

Upstream

CVE-2026-3833

CVE-2026-42009

CVE-2026-42010

CVE-2026-42013

CVE-2026-42014

CVE-2026-42015

CVE-2026-5260

Published

2026-05-22T13:18:52Z

Modified

2026-05-22T13:30:19.639784776Z

Summary

gnutls security update

Details

GnuTLS is a secure communications library implementing the SSL, TLS and DTLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, and other required structures. The project strives to provide a secure communications back-end, simple to use and integrated with the rest of the base Linux libraries. A back-end designed to work and be secure out of the box, keeping the complexity of TLS and PKI out of application code.

Security Fix(es):

A flaw was found in gnutls. This vulnerability occurs because gnutls performs case-sensitive comparisons of nameConstraints labels, specifically for dNSName (DNS) or rfc822Name (email) constraints within excludedSubtrees or permittedSubtrees. A remote attacker can exploit this by crafting a leaf certificate with casing differences in the Subject Alternative Name (SAN), leading to a policy bypass where a certificate that should be rejected is instead accepted. This could result in unauthorized access or information disclosure.(CVE-2026-3833)

A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS) packet reordering logic. The comparator function, responsible for ordering DTLS packets by sequence numbers, did not correctly handle packets with duplicate sequence numbers. This could lead to unstable packet ordering or undefined behavior, resulting in a denial of service.(CVE-2026-42009)

A flaw was found in gnutls. Servers configured with RSA-PSK (Rivest–Shamir–Adleman – Pre-Shared Key) wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass. This vulnerability allows an attacker to gain unauthorized access by circumventing the authentication process.(CVE-2026-42010)

(CVE-2026-42013)

(CVE-2026-42014)

(CVE-2026-42015)

(CVE-2026-5260)

Database specific

{
    "severity": "Critical"
}

References

Affected packages

openEuler:22.03-LTS-SP4 / gnutls

Package

Name: gnutls
Purl: pkg:rpm/openEuler/gnutls&distro=openEuler-22.03-LTS-SP4

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.7.2-23.oe2203sp4

Ecosystem specific

{
    "src": [
        "gnutls-3.7.2-23.oe2203sp4.src.rpm"
    ],
    "x86_64": [
        "gnutls-3.7.2-23.oe2203sp4.x86_64.rpm",
        "gnutls-debuginfo-3.7.2-23.oe2203sp4.x86_64.rpm",
        "gnutls-debugsource-3.7.2-23.oe2203sp4.x86_64.rpm",
        "gnutls-devel-3.7.2-23.oe2203sp4.x86_64.rpm",
        "gnutls-utils-3.7.2-23.oe2203sp4.x86_64.rpm"
    ],
    "aarch64": [
        "gnutls-3.7.2-23.oe2203sp4.aarch64.rpm",
        "gnutls-debuginfo-3.7.2-23.oe2203sp4.aarch64.rpm",
        "gnutls-debugsource-3.7.2-23.oe2203sp4.aarch64.rpm",
        "gnutls-devel-3.7.2-23.oe2203sp4.aarch64.rpm",
        "gnutls-utils-3.7.2-23.oe2203sp4.aarch64.rpm"
    ],
    "noarch": [
        "gnutls-help-3.7.2-23.oe2203sp4.noarch.rpm"
    ]
}

Database specific

source

"https://repo.openeuler.org/security/data/osv/OESA-2026-2404.json"