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.

According to the versions of the xz packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

    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)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization 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.

According to the versions of the xz packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    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)

Tenable has extracted the preceding description block directly from the EulerOS 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.

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 host has packages installed that are affected by a vulnerability as referenced in the USN-8362-1 advisory.

    It was discovered that XZ Utils did not properly manage memory when attempting to append data to a decoded     index that contained no records. An attacker could possibly use this issue to cause XZ Utils to crash,     resulting in a denial of service, or execute arbitrary code.

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

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

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:2118-1 advisory.

    This update for xz fixes the following issue

    - CVE-2026-34743: buffer overflow in lzma_index_append() (bsc#1261280).

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

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

The remote openSUSE 16 host has packages installed that are affected by a vulnerability as referenced in the openSUSE- SU-2026:20813-1 advisory.

    This update for xz fixes the following issue

    - CVE-2026-34743: buffer overflow in lzma_index_append() (bsc#1261280).

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

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

The remote SUSE Linux SLES12 host has packages installed that are affected by a vulnerability as referenced in the SUSE- SU-2026:2052-1 advisory.

    This update for xz fixes the following issue

    - CVE-2026-34743: buffer overflow in lzma_index_append() (bsc#1261280).

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

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

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:2051-1 advisory.

    This update for xz fixes the following issue

    - CVE-2026-34743: buffer overflow in lzma_index_append() (bsc#1261280).

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

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

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-014304 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.

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

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

An update of the xz package has been released.

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
320743	EulerOS Virtualization 2.13.0 : xz (EulerOS-SA-2026-2422)	Nessus	Huawei Local Security Checks	medium
320712	EulerOS Virtualization 2.13.1 : xz (EulerOS-SA-2026-2393)	Nessus	Huawei Local Security Checks	medium
320298	EulerOS 2.0 SP13 : xz (EulerOS-SA-2026-2319)	Nessus	Huawei Local Security Checks	medium
320287	EulerOS 2.0 SP13 : xz (EulerOS-SA-2026-2362)	Nessus	Huawei Local Security Checks	medium
318634	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 : XZ Utils vulnerability (USN-8362-1)	Nessus	Ubuntu Local Security Checks	medium
318068	SUSE SLES15 Security Update : xz (SUSE-SU-2026:2118-1)	Nessus	SuSE Local Security Checks	medium
317649	openSUSE 16 Security Update : xz (openSUSE-SU-2026:20813-1)	Nessus	SuSE Local Security Checks	medium
316864	SUSE SLES12 Security Update : xz (SUSE-SU-2026:2052-1)	Nessus	SuSE Local Security Checks	medium
316768	SUSE SLED15 / SLES15 Security Update : xz (SUSE-SU-2026:2051-1)	Nessus	SuSE Local Security Checks	medium
310533	Unity Linux 20.1070e Security Update: xz (UTSA-2026-014304)	Nessus	Unity Linux Local Security Checks	medium
310101	Photon OS 5.0: Xz PHSA-2026-5.0-0830	Nessus	PhotonOS Local Security Checks	medium
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

medium

medium

medium

medium

medium

medium

medium

medium

medium

medium

medium