Detections
Analytics
AlmaLinux 8 : libarchive (ALSA-2026:8534)
critical Nessus Plugin ID 307561
Synopsis
The remote AlmaLinux host is missing one or more security updates.Description
The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:8534 advisory.* libarchive: libarchive: Information disclosure via heap out-of-bounds read in RAR archive processing (CVE-2026-4424)
* libarchive: libarchive: Arbitrary code execution via integer overflow in ISO9660 image processing (CVE-2026-5121)
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 bsdtar, libarchive and / or libarchive-devel packages.See Also
Plugin Details
Severity: Critical
ID: 307561
File Name: alma_linux_ALSA-2026-8534.nasl
Version: 1.1
Type: Local
Family: Alma Linux Local Security Checks
Published: 4/20/2026
Updated: 4/20/2026
Supported Sensors: Nessus Agent, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 7.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-5121
CVSS v3
Risk Factor: Critical
Base Score: 9.8
Temporal Score: 8.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:alma:linux:8::realtime, cpe:/o:alma:linux:8::nfv, cpe:/o:alma:linux:8::appstream, cpe:/o:alma:linux:8::baseos, cpe:/o:alma:linux:8::powertools, p-cpe:/a:alma:linux:libarchive-devel, p-cpe:/a:alma:linux:libarchive, p-cpe:/a:alma:linux:bsdtar, cpe:/o:alma:linux:8, cpe:/o:alma:linux:8::supplementary, cpe:/o:alma:linux:8::sap_hana, cpe:/o:alma:linux:8::sap, cpe:/o:alma:linux:8::resilientstorage, cpe:/o:alma:linux:8::highavailability
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 4/16/2026
Vulnerability Publication Date: 3/19/2026
Reference Information
CVE: CVE-2026-4424, CVE-2026-5121