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SUSE SLED15 / SLES15 Security Update : c-ares (SUSE-SU-2026:4021-1)

high Nessus Plugin ID 348453

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4021-1 advisory.

 - CVE-2024-25629: out of bounds read in ares__read_line() (bsc#1220279).
 - CVE-2025-31498: use-after-free in read_answers() when process_answer() may re-enqueue a query (bsc#1240955).
 - CVE-2025-62408: c-ares 1.32.3-1.34.5 use after free() (bsc#1254738).
 - CVE-2026-33630: Use-after-free / double-free in c-ares query-completion handling, remotely triggerable via ares_getaddrinfo() over TCP (bsc#1270416).
 - CVE-2026-69184: CPU-exhaustion denial of service via unbounded DNS name compression pointer chains (bsc#1276290).
 - CVE-2026-69186: Memory-amplification denial of service via unvalidated DNS header record counts (bsc#1276291).

 Changes for c-ares:

 - updated to 1.36.8.

Tenable has extracted the preceding description block directly from the SUSE 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 c-ares-devel and / or libcares2 packages.

See Also

https://bugzilla.suse.com/1220279

https://bugzilla.suse.com/1240955

https://bugzilla.suse.com/1254738

https://bugzilla.suse.com/1270416

https://bugzilla.suse.com/1276290

https://bugzilla.suse.com/1276291

https://www.suse.com/security/cve/CVE-2024-25629

https://www.suse.com/security/cve/CVE-2025-31498

https://www.suse.com/security/cve/CVE-2025-62408

https://www.suse.com/security/cve/CVE-2026-33630

https://www.suse.com/security/cve/CVE-2026-69184

https://www.suse.com/security/cve/CVE-2026-69186

http://www.nessus.org/u?e2ba882b

Plugin Details

Severity: High

ID: 348453

File Name: suse_SU-2026-4021-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 9/21/2026

Updated: 9/21/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

Percentile: 96.29

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2024-25629

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

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

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

CVSS v4

Risk Factor: High

Base Score: 8.3

Threat Score: 4.9

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2025-31498

Vulnerability Information

CPE: cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:c-ares-devel, p-cpe:/a:novell:suse_linux:libcares2

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/7/2026

Vulnerability Publication Date: 2/23/2024

Reference Information

CVE: CVE-2024-25629, CVE-2025-31498, CVE-2025-62408, CVE-2026-33630, CVE-2026-69184, CVE-2026-69186

SuSE: SUSE-SU-2026:4021-1