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Rocky Linux 9 [CIQ] Security Update: glibc / glibc-all-langpacks / glibc-benchtests / etc Multiple Vulnerabilities (crlsa-2026_20597)
medium Nessus Plugin ID 355874
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Synopsis
The Rocky Linux host is missing one or more security updates.Description
The Rocky Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-2026_20597 advisory.* glibc: glibc: Incorrect DNS response parsing via crafted DNS server response (CVE-2026-4437)
* glibc: glibc: Invalid DNS hostname returned via gethostbyaddr functions (CVE-2026-4438)
* glibc: glibc: Denial of Service via iconv() function with specific character sets (CVE-2026-4046)
Tenable has extracted the preceding description block directly from the CIQ 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 packages based on the guidance in CIQ advisory crlsa-2026_20597.See Also
https://access.redhat.com/errata/RHSA-2026:20597
https://bugzilla.redhat.com/show_bug.cgi?id=2449777
https://bugzilla.redhat.com/show_bug.cgi?id=2449783
https://bugzilla.redhat.com/show_bug.cgi?id=2453117
https://errata.build.resf.org/RLSA-2026:20597
Plugin Details
Severity: Medium
ID: 355874
File Name: ciq_rocky_linux_9_crlsa-2026_20597.nasl
Version: 1.1
Type: Local
Published: 10/1/2026
Updated: 10/1/2026
Supported Sensors: Continuous Assessment, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.73
Vendor
Vendor Severity: Unknown
CVSS v2
Risk Factor: Medium
Base Score: 6.4
Temporal Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P
CVSS Score Source: CVE-2026-4437
CVSS v3
Risk Factor: Medium
Base Score: 5.4
Temporal Score: 4.9
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS Score Source: CVE-2026-4438
Vulnerability Information
Required KB Items: Host/OS/extended-third-party, Host/local_checks_enabled, Host/RockyLinux/release, Host/RockyLinux/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 5/30/2026
Vulnerability Publication Date: 2/5/2026