The version of AIX installed on the remote host is prior to APAR IJ58306. It is, therefore, affected by multiple vulnerabilities as referenced in the IJ58306 advisory.

  - A flaw was found in libxml2. This vulnerability occurs when the library processes a specially crafted XML     Schema Definition (XSD) validated document that includes an internal entity reference. An attacker could     exploit this by providing a malicious document, leading to a type confusion error that causes the     application to crash. This results in a denial of service (DoS), making the affected system or application     unavailable. (CVE-2026-6732)

  - A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are     handled. The parser does not enforce a limit on inclusion depth when resolving nested <include>     directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This     may lead to stack exhaustion and application crashes, creating a denial-of-service risk. (CVE-2026-0989)

  - A flaw was found in libxml2, an XML parsing library. This uncontrolled recursion vulnerability occurs in     the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references     itself. A remote attacker could exploit this configuration-dependent issue by providing a specially     crafted XML catalog, leading to infinite recursion and call stack exhaustion. This ultimately results in a     segmentation fault, causing a Denial of Service (DoS) by crashing affected applications. (CVE-2026-0990)

  - A flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when     processing XML catalogs that contain repeated <nextCatalog> elements pointing to the same downstream     catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to     redundantly traverse catalog chains. This leads to excessive CPU consumption and degrades application     availability, resulting in a denial-of-service condition. (CVE-2026-0992)

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

The version of libxml2 installed on the remote host is prior to 2.11.9 / 2.15.2. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2026-070-02 advisory.

    New libxml2 packages are available for Slackware 15.0 and -current to fix security issues.

Tenable has extracted the preceding description block directly from the libxml2 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 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 multiple vulnerabilities as referenced in the USN-7974-1 advisory.

    It was discovered that libxml2 incorrectly handled maliciously crafted SGML catalog files. An attacker     could possibly use this issue to cause libxml2 to consume excessive resources, leading to a denial of     service. (CVE-2025-8732)

    It was discovered that libxml2 incorrectly handled recursive include directories with the RelaxNG parser.
    An attacker could possibly use this issue to cause libxml2 to consume excessive resources, leading to a     denial of service. (CVE-2026-0989)

    Nick Wellnhofer discovered that libxml2 incorrectly parsed catalogs with self-referencing URI delegates.
    An attacker could possibly use this issue to cause libxml2 to consume excessive resources, leading to a     denial of service. (CVE-2026-0990)

    Nick Wellnhofer discovered that libxml2 inefficiently parsed catalogs linked with repeating nextCatalog     elements. An attacker could possibly use this issue to cause libxml2 to use excessive resources, leading     to a denial of service. (CVE-2026-0992)

Tenable has extracted the preceding description block directly from the Ubuntu 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 openSUSE 15 host has a package installed that is affected by a vulnerability as referenced in the SUSE- SU-2026:0334-1 advisory.

    - CVE-2026-0989: Fixed call stack exhaustion leading to application       crash due to RelaxNG parser not limiting the recursion depth when       resolving `<include>` directives (bsc#1256805)

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.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1397 advisory.

    A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are     handled. The parser does not enforce a limit on inclusion depth when resolving nested <include>     directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This     may lead to stack exhaustion and application crashes, creating a denial-of-service risk. (CVE-2026-0989)

Tenable has extracted the preceding description block directly from the tested product 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 version of AIX installed on the remote host is prior to APAR IJ58124. It is, therefore, affected by multiple vulnerabilities as referenced in the IJ58124 advisory.

  - A flaw was found in libxml2. This vulnerability occurs when the library processes a specially crafted XML     Schema Definition (XSD) validated document that includes an internal entity reference. An attacker could     exploit this by providing a malicious document, leading to a type confusion error that causes the     application to crash. This results in a denial of service (DoS), making the affected system or application     unavailable. (CVE-2026-6732)

  - A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are     handled. The parser does not enforce a limit on inclusion depth when resolving nested <include>     directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This     may lead to stack exhaustion and application crashes, creating a denial-of-service risk. (CVE-2026-0989)

  - A flaw was found in libxml2, an XML parsing library. This uncontrolled recursion vulnerability occurs in     the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references     itself. A remote attacker could exploit this configuration-dependent issue by providing a specially     crafted XML catalog, leading to infinite recursion and call stack exhaustion. This ultimately results in a     segmentation fault, causing a Denial of Service (DoS) by crashing affected applications. (CVE-2026-0990)

  - A flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when     processing XML catalogs that contain repeated <nextCatalog> elements pointing to the same downstream     catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to     redundantly traverse catalog chains. This leads to excessive CPU consumption and degrades application     availability, resulting in a denial-of-service condition. (CVE-2026-0992)

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

The version of AIX installed on the remote host is prior to APAR IJ58140. It is, therefore, affected by multiple vulnerabilities as referenced in the IJ58140 advisory.

  - A flaw was found in libxml2. This vulnerability occurs when the library processes a specially crafted XML     Schema Definition (XSD) validated document that includes an internal entity reference. An attacker could     exploit this by providing a malicious document, leading to a type confusion error that causes the     application to crash. This results in a denial of service (DoS), making the affected system or application     unavailable. (CVE-2026-6732)

  - A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are     handled. The parser does not enforce a limit on inclusion depth when resolving nested <include>     directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This     may lead to stack exhaustion and application crashes, creating a denial-of-service risk. (CVE-2026-0989)

  - A flaw was found in libxml2, an XML parsing library. This uncontrolled recursion vulnerability occurs in     the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references     itself. A remote attacker could exploit this configuration-dependent issue by providing a specially     crafted XML catalog, leading to infinite recursion and call stack exhaustion. This ultimately results in a     segmentation fault, causing a Denial of Service (DoS) by crashing affected applications. (CVE-2026-0990)

  - A flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when     processing XML catalogs that contain repeated <nextCatalog> elements pointing to the same downstream     catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to     redundantly traverse catalog chains. This leads to excessive CPU consumption and degrades application     availability, resulting in a denial-of-service condition. (CVE-2026-0992)

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

According to the versions of the libxml2 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

    A flaw was identified in the interactive shell of the xmllint utility, part of the libxml2 project, where     memory allocated for user input is not properly released under certain conditions. When a user submits     input consisting only of whitespace, the program skips command execution but fails to free the allocated     buffer. Repeating this action causes memory to continuously accumulate. Over time, this can exhaust system     memory and terminate the xmllint process, creating a denial-of-service condition on the local     system.(CVE-2026-1757)

    A flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when     processing XML catalogs that contain repeated nextCatalog elements pointing to the same downstream     catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to     redundantly traverse catalog chains. This leads to excessive CPU consumption and degrades application     availability, resulting in a denial-of-service condition.(CVE-2026-0992)

    A flaw was found in libxml2, an XML parsing library. This uncontrolled recursion vulnerability occurs in     the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references     itself. A remote attacker could exploit this configuration-dependent issue by providing a specially     crafted XML catalog, leading to infinite recursion and call stack exhaustion. This ultimately results in a     segmentation fault, causing a Denial of Service (DoS) by crashing affected applications.(CVE-2026-0990)

    A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are     handled. The parser does not enforce a limit on inclusion depth when resolving nested include     directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This     may lead to stack exhaustion and application crashes, creating a denial-of-service risk.(CVE-2026-0989)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization libxml2 security advisory.

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

According to the versions of the libxml2 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

    A flaw was found in libxml2, an XML parsing library. This uncontrolled recursion vulnerability occurs in     the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references     itself. A remote attacker could exploit this configuration-dependent issue by providing a specially     crafted XML catalog, leading to infinite recursion and call stack exhaustion. This ultimately results in a     segmentation fault, causing a Denial of Service (DoS) by crashing affected applications.(CVE-2026-0990)

    A flaw was found in the libxml2 library. This uncontrolled resource consumption vulnerability occurs when     processing XML catalogs that contain repeated nextCatalog elements pointing to the same downstream     catalog. A remote attacker can exploit this by supplying crafted catalogs, causing the parser to     redundantly traverse catalog chains. This leads to excessive CPU consumption and degrades application     availability, resulting in a denial-of-service condition.(CVE-2026-0992)

    A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are     handled. The parser does not enforce a limit on inclusion depth when resolving nested include     directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This     may lead to stack exhaustion and application crashes, creating a denial-of-service risk.(CVE-2026-0989)

    A flaw was identified in the interactive shell of the xmllint utility, part of the libxml2 project, where     memory allocated for user input is not properly released under certain conditions. When a user submits     input consisting only of whitespace, the program skips command execution but fails to free the allocated     buffer. Repeating this action causes memory to continuously accumulate. Over time, this can exhaust system     memory and terminate the xmllint process, creating a denial-of-service condition on the local     system.(CVE-2026-1757)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization libxml2 security advisory.

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

An update of the libxml2 package has been released.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
318322	AIX : Multiple Vulnerabilities (IJ58306)	Nessus	AIX Local Security Checks	2026/6/3	2026/6/5	high
301909	Slackware Linux 15.0 / current libxml2 Multiple Vulnerabilities (SSA:2026-070-02)	Nessus	Slackware Local Security Checks	2026/3/12	2026/3/16	medium
296249	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 : libxml2 vulnerabilities (USN-7974-1)	Nessus	Ubuntu Local Security Checks	2026/1/23	2026/2/3	medium
297427	openSUSE 15 Security Update : libxml2 (SUSE-SU-2026:0334-1)	Nessus	SuSE Local Security Checks	2026/1/31	2026/2/3	low
298086	Amazon Linux 2023 : libxml2, libxml2-devel, libxml2-static (ALAS2023-2026-1397)	Nessus	Amazon Linux Local Security Checks	2026/2/5	2026/2/5	low
318323	AIX : Multiple Vulnerabilities (IJ58124)	Nessus	AIX Local Security Checks	2026/6/3	2026/6/5	high
318324	AIX : Multiple Vulnerabilities (IJ58140)	Nessus	AIX Local Security Checks	2026/6/3	2026/6/5	high
319332	EulerOS Virtualization 2.13.0 : libxml2 (EulerOS-SA-2026-2178)	Nessus	Huawei Local Security Checks	2026/6/6	2026/6/6	medium
319455	EulerOS Virtualization 2.12.1 : libxml2 (EulerOS-SA-2026-2081)	Nessus	Huawei Local Security Checks	2026/6/6	2026/6/6	medium
322163	Photon OS 5.0: Libxml2 PHSA-2026-5.0-0874	Nessus	PhotonOS Local Security Checks	2026/6/23	2026/6/27	medium

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