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AlmaLinux 10 : mod_http2 (ALSA-2026:34355)

high Nessus Plugin ID 324727

Synopsis

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

Description

The remote AlmaLinux 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the ALSA-2026:34355 advisory.

 * httpd: mod_http2: Apache HTTP Server mod_http2: Use After Free vulnerability allows arbitrary code execution or denial of service. (CVE-2026-48913)
 * httpd: Apache HTTP Server: Out-of-bounds Read in mod_headers and mod_mime (CVE-2026-43951)


 Bug Fix(es) and Enhancement(s):

 * address CVE-2026-43951 and CVE-2026-48913 in mod_http2 (JIRA:AlmaLinux-188008)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 mod_http2 package.

See Also

https://access.redhat.com/errata/RHSA-2026:34355

https://errata.almalinux.org/10/ALSA-2026-34355.html

Plugin Details

Severity: High

ID: 324727

File Name: alma_linux_ALSA-2026-34355.nasl

Version: 1.1

Type: Local

Published: 7/2/2026

Updated: 7/2/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.8

Percentile: 22.52

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2026-48913

CVSS v3

Risk Factor: High

Base Score: 7.3

Temporal Score: 6.4

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

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

Vulnerability Information

CPE: cpe:/o:alma:linux:10::appstream, p-cpe:/a:alma:linux:mod_http2, cpe:/o:alma:linux:10::sap_hana, cpe:/o:alma:linux:10, cpe:/o:alma:linux:10::nfv, cpe:/o:alma:linux:10::baseos, cpe:/o:alma:linux:10::supplementary, cpe:/o:alma:linux:10::sap, cpe:/o:alma:linux:10::resilientstorage, cpe:/o:alma:linux:10::powertools, cpe:/o:alma:linux:10::highavailability, cpe:/o:alma:linux:10::realtime

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/1/2026

Vulnerability Publication Date: 6/8/2026

Reference Information

CVE: CVE-2026-43951, CVE-2026-48913

CWE: 125, 825

RHSA: 2026:34355