Detections
Analytics
Linux Distros Unpatched Vulnerability : CVE-2026-34743
medium Nessus Plugin ID 304496
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Synopsis
The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.Description
The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.- XZ Utils provide a general-purpose data-compression library plus command-line tools. Prior to version 5.8.3, if lzma_index_decoder() was used to decode an Index that contained no Records, the resulting lzma_index was left in a state where where a subsequent lzma_index_append() would allocate too little memory, and a buffer overflow would occur. This issue has been patched in version 5.8.3. (CVE-2026-34743)
Note that Nessus relies on the presence of the package as reported by the vendor.
Solution
There is no known solution at this time.See Also
https://access.redhat.com/security/cve/cve-2026-34743
Plugin Details
Severity: Medium
ID: 304496
File Name: unpatched_CVE_2026_34743.nasl
Version: 1.6
Type: Local
Agent: unix
Family: Misc.
Published: 4/1/2026
Updated: 4/16/2026
Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 2.2
CVSS v2
Risk Factor: Medium
Base Score: 5
Temporal Score: 4.3
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS Score Source: CVE-2026-34743
CVSS v3
Risk Factor: Medium
Base Score: 5.3
Temporal Score: 4.9
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 6.3
Threat Score: 1.7
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Vulnerability Information
CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:xz-utils, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:redhat:enterprise_linux:xz-lzma-compat, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:centos:centos:xz-lzma-compat, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:centos:centos:xz-libs, p-cpe:/a:centos:centos:xz-compat-libs, cpe:/o:canonical:ubuntu_linux:25.10, cpe:/o:redhat:enterprise_linux:9, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:centos:centos:8, p-cpe:/a:redhat:enterprise_linux:xz-devel, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, cpe:/o:debian:debian_linux:13.0, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:xz-utils, p-cpe:/a:redhat:enterprise_linux:xz-libs, p-cpe:/a:redhat:enterprise_linux:xz, p-cpe:/a:centos:centos:xz-devel, cpe:/o:centos:centos:7, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:centos:centos:xz, p-cpe:/a:redhat:enterprise_linux:xz-compat-libs, cpe:/o:canonical:ubuntu_linux:22.04:-:lts
Required KB Items: Host/cpu, Host/local_checks_enabled, global_settings/vendor_unpatched, Host/OS/identifier
Exploit Ease: No known exploits are available
Reference Information
CVE: CVE-2026-34743