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.

The version of CBL-Mariner Releases installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2026-34743 advisory.

  - 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 has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of CBL-Mariner Releases installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2026-34743 advisory.

  - 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 has not tested for this issue but has instead relied only on the application's self-reported version number.

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.

The version of xz installed on the remote host is prior to 5.2.13 / 5.8.3. It is, therefore, affected by a vulnerability as referenced in the SSA:2026-090-01 advisory.

    New xz packages are available for Slackware 15.0 and -current to fix security issues.

Tenable has extracted the preceding description block directly from the xz security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
306017	CBL Mariner 2.0 Security Update: CBL-Mariner Releases (CVE-2026-34743)	Nessus	MarinerOS Local Security Checks	medium
305980	Azure Linux 3.0 Security Update: CBL-Mariner Releases (CVE-2026-34743)	Nessus	Azure Linux Local Security Checks	medium
304496	Linux Distros Unpatched Vulnerability : CVE-2026-34743	Nessus	Misc.	medium
304439	Slackware Linux 15.0 / current xz Vulnerability (SSA:2026-090-01)	Nessus	Slackware Local Security Checks	medium

Detections

Analytics

CVE-2026-34743

medium

Tenable Plugins

medium

medium

medium

medium