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EulerOS 2.0 SP12 : krb5 (EulerOS-SA-2026-2596)

high Nessus Plugin ID 326197

Synopsis

The remote EulerOS host is missing multiple security updates.

Description

According to the versions of the krb5 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

 In MIT Kerberos 5 (aka krb5) before 1.22.3, there is a NULL pointer dereference if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, causing the process to terminate in parse_nego_message.(CVE-2026-40355)

 In MIT Kerberos 5 (aka krb5) before 1.22.3, there is an integer underflow and resultant out-of-bounds read if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process to terminate in parse_message.(CVE-2026-40356)

Tenable has extracted the preceding description block directly from the EulerOS krb5 security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected krb5 packages.

See Also

http://www.nessus.org/u?cf45d9ab

Plugin Details

Severity: High

ID: 326197

File Name: EulerOS_SA-2026-2596.nasl

Version: 1.1

Type: Local

Published: 7/10/2026

Updated: 7/10/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.75

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-40356

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:huawei:euleros:krb5-libs, p-cpe:/a:huawei:euleros:krb5, p-cpe:/a:huawei:euleros:krb5-client, p-cpe:/a:huawei:euleros:krb5-devel, p-cpe:/a:huawei:euleros:krb5-help, cpe:/o:huawei:euleros:2.0, p-cpe:/a:huawei:euleros:krb5-server

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/sp

Excluded KB Items: Host/EulerOS/uvp_version

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/10/2026

Vulnerability Publication Date: 4/28/2026

Reference Information

CVE: CVE-2026-40355, CVE-2026-40356