A double free issue has been identified in libarchive's RAR5 reader. During parsing of a specially crafted RAR5 archive, the filtered_buf pointer may remain stale after being freed during unpacking state reinitialization. Subsequent processing of another archive entry can trigger a second free of the same memory region, resulting in a double-free condition. Successful exploitation may cause applications using the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service.

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

    A double free issue has been identified in libarchive's RAR5 reader. During parsing of a specially crafted     RAR5 archive, the filtered_buf pointer may remain stale after being freed during unpacking state     reinitialization. Subsequent processing of another archive entry can trigger a second free of the same     memory region, resulting in a double-free condition. Successful exploitation may cause applications using     the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service.(CVE-2026-14164)

Tenable has extracted the preceding description block directly from the EulerOS libarchive 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 Alibaba Cloud Linux 3 host has packages installed that are affected by a vulnerability as referenced in the ALINUX3-SA-2026:0258 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2026-14164:
    A double free issue has been identified in libarchive's RAR5 reader. During parsing of a specially crafted     RAR5 archive, the filtered_buf pointer may remain stale after being freed during unpacking state     reinitialization. Subsequent processing of another archive entry can trigger a second free of the same     memory region, resulting in a double-free condition. Successful exploitation may cause applications using     the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service.

Tenable has extracted the preceding description block directly from the Alibaba Cloud 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.

The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4762 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4762-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                          Abhijith PA     August 31, 2026                               https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : libarchive     Version        : 3.4.3-2+deb11u5 3.6.2-1+deb12u5     CVE ID         : CVE-2026-14164 CVE-2026-15028 CVE-2026-16517

    Several vulnerabilities were discovered in libarchive, a multi-format     archive and compression library

    CVE-2026-14164

        A double free issue has been identified in libarchive's RAR5         reader. During parsing of a specially crafted RAR5 archive, the         filtered_buf pointer may remain stale after being freed during         unpacking state reinitialization. Subsequent processing of another         archive entry can trigger a second free of the same memory region,         resulting in a double-free condition. Successful exploitation may         cause applications using the vulnerable libarchive API to         terminate unexpectedly, leading to a denial of service.

    CVE-2026-15028

        A remote attacker to trigger a heap overflow by providing a         specially crafted tar archive. The issue occurs during the parsing         of a PAX extended header containing a malformed SUN.holesdata         sparse-file attribute. Successful exploitation could lead to a         denial of service, making the system unavailable, or potentially         allow for arbitrary code execution, giving the attacker control         over the affected system.

    CVE-2026-16517

        A signed integer overflow vulnerability was found in libarchive's         ZIP writer. In the archive_write_zip_header function in         archive_write_set_format_zip.c, when ZIP encryption is enabled and         the entry file size is close to INT64_MAX, the addition of the         encryption overhead to the entry size overflows int64_t, resulting         in undefined behavior. This could lead to incorrect Zip64         extension decisions or potential memory corruption.

    For Debian 11 bullseye, these problems have been fixed in version     3.4.3-2+deb11u5.

    For Debian 12 bookworm, these problems have been fixed in version     3.6.2-1+deb12u5.

    We recommend that you upgrade your libarchive packages.

    For the detailed security status of libarchive please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/libarchive

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

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

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

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:58558 advisory.

    The libarchive programming library can create and read several different streaming archive formats,     including GNU tar, cpio, and ISO 9660 CD-ROM images. Libarchive is used notably in the bsdtar utility,     scripting language bindings such as python-libarchive, and several popular desktop file managers.

    Security Fix(es):

    * libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in     init_unpack() (CVE-2026-14164)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:58574 advisory.

    The libarchive programming library can create and read several different streaming archive formats,     including GNU tar, cpio, and ISO 9660 CD-ROM images. Libarchive is used notably in the bsdtar utility,     scripting language bindings such as python-libarchive, and several popular desktop file managers.

    Security Fix(es):

    * libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in     init_unpack() (CVE-2026-14164)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:58573 advisory.

    The libarchive programming library can create and read several different streaming archive formats,     including GNU tar, cpio, and ISO 9660 CD-ROM images. Libarchive is used notably in the bsdtar utility,     scripting language bindings such as python-libarchive, and several popular desktop file managers.

    Security Fix(es):

    * libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in     init_unpack() (CVE-2026-14164)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

The remote MiracleLinux 9 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2026-1610:06 advisory.

    * libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in     init_unpack() (CVE-2026-14164)

Tenable has extracted the preceding description block directly from the MiracleLinux 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 Redhat Enterprise Linux 10 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:56954 advisory.

    The libarchive programming library can create and read several different streaming archive formats,     including GNU tar, cpio, and ISO 9660 CD-ROM images. Libarchive is used notably in the bsdtar utility,     scripting language bindings such as python-libarchive, and several popular desktop file managers.

    Security Fix(es):

    * libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in     init_unpack() (CVE-2026-14164)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

The remote AlmaLinux 10 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:52675 advisory.

    * libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in     init_unpack() (CVE-2026-14164)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-52674 advisory.

    - Related: CVE-2026-14164

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

The remote RockyLinux 10 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:52675 advisory.

    * libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in     init_unpack() (CVE-2026-14164)

Tenable has extracted the preceding description block directly from the RockyLinux 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 RockyLinux 9 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:52674 advisory.

    * libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in     init_unpack() (CVE-2026-14164)

Tenable has extracted the preceding description block directly from the RockyLinux 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 Oracle Linux 10 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-52675 advisory.

    - Related: CVE-2026-14164

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

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:52675 advisory.

    The libarchive programming library can create and read several different streaming archive formats,     including GNU tar, cpio, and ISO 9660 CD-ROM images. Libarchive is used notably in the bsdtar utility,     scripting language bindings such as python-libarchive, and several popular desktop file managers.

    Security Fix(es):

    * libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in     init_unpack() (CVE-2026-14164)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:52674 advisory.

    The libarchive programming library can create and read several different streaming archive formats,     including GNU tar, cpio, and ISO 9660 CD-ROM images. Libarchive is used notably in the bsdtar utility,     scripting language bindings such as python-libarchive, and several popular desktop file managers.

    Security Fix(es):

    * libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in     init_unpack() (CVE-2026-14164)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A double free issue has been identified in libarchive's RAR5 reader. During parsing of a specially crafted     RAR5 archive, the filtered_buf pointer may remain stale after being freed during unpacking state     reinitialization. Subsequent processing of another archive entry can trigger a second free of the same     memory region, resulting in a double-free condition. Successful exploitation may cause applications using     the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service. (CVE-2026-14164)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
343746	EulerOS 2.0 SP12 : libarchive (EulerOS-SA-2026-3274)	Nessus	Huawei Local Security Checks	Local	high
343606	EulerOS 2.0 SP12 : libarchive (EulerOS-SA-2026-3349)	Nessus	Huawei Local Security Checks	Local	high
342080	Alibaba Cloud Linux 3 : 0258: libarchive (ALINUX3-SA-2026:0258)	Nessus	Alibaba Cloud Linux Local Security Checks	Local	high
341670	Debian dla-4762 : libarchive-dev - security update	Nessus	Debian Local Security Checks	Local	low
339083	RHEL 9 : libarchive (RHSA-2026:58558)	Nessus	Red Hat Local Security Checks	Local	high
339051	RHEL 9 : libarchive (RHSA-2026:58574)	Nessus	Red Hat Local Security Checks	Local	high
339049	RHEL 9 : libarchive (RHSA-2026:58573)	Nessus	Red Hat Local Security Checks	Local	high
338795	MiracleLinux 9 : libarchive-3.5.3-11.el9_8 (AXSA:2026-1610:06)	Nessus	Miracle Linux Local Security Checks	Local	high
338064	RHEL 10 : libarchive (RHSA-2026:56954)	Nessus	Red Hat Local Security Checks	Local	high
334869	AlmaLinux 10 : libarchive (ALSA-2026:52675)	Nessus	Alma Linux Local Security Checks	Local	high
334555	Oracle Linux 9 : libarchive (ELSA-2026-52674)	Nessus	Oracle Linux Local Security Checks	Local	high
334537	RockyLinux 10 : libarchive (RLSA-2026:52675)	Nessus	Rocky Linux Local Security Checks	Local	high
334481	RockyLinux 9 : libarchive (RLSA-2026:52674)	Nessus	Rocky Linux Local Security Checks	Local	high
334428	Oracle Linux 10 : libarchive (ELSA-2026-52675)	Nessus	Oracle Linux Local Security Checks	Local	high
333597	RHEL 10 : libarchive (RHSA-2026:52675)	Nessus	Red Hat Local Security Checks	Local	high
333595	RHEL 9 : libarchive (RHSA-2026:52674)	Nessus	Red Hat Local Security Checks	Local	high
323993	Linux Distros Unpatched Vulnerability : CVE-2026-14164	Nessus	Misc.	Local	high

Detections

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