A flaw was found in the interactive shell of the xmllint command-line tool, used for parsing XML files. When a user inputs an overly long command, the program does not check the input size properly, which can cause it to crash. This issue might allow attackers to run harmful code in rare configurations without modern protections.

An update of the libxml2 package has been released.

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

    A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under     certain circumstances when the XML schematron has the sch:name path='...'/ schema elements. This     flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the     program's crash using libxml or other possible undefined behaviors.(CVE-2025-49794)

    A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can     trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that     can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to     sensitive data being corrupted in memory.(CVE-2025-49796)

    A flaw was found in the interactive shell of the xmllint command-line tool, used for parsing XML files.
    When a user inputs an overly long command, the program does not check the input size properly, which can     cause it to crash. This issue might allow attackers to run harmful code in rare configurations without     modern protections.(CVE-2025-6170)

Tenable has extracted the preceding description block directly from the EulerOS 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 installation on the remote host is affected by the following vulnerabilities :

    A flaw was found in the interactive shell of the xmllint command-line tool, used for parsing XML files.
    When a user inputs an overly long command, the program does not check the input size properly, which can     cause it to crash. This issue might allow attackers to run harmful code in rare configurations without     modern protections.(CVE-2025-6170)

    A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can     trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that     can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to     sensitive data being corrupted in memory.(CVE-2025-49796)

    A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under     certain circumstances when the XML schematron has the sch:name path='...'/ schema elements. This     flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the     program's crash using libxml or other possible undefined behaviors.(CVE-2025-49794)

Tenable has extracted the preceding description block directly from the EulerOS 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 Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-986104 advisory.

    A flaw was found in the interactive shell of the xmllint command-line tool, used for parsing XML files.
    When a user inputs an overly long command, the program does not check the input size properly, which can     cause it to crash. This issue might allow attackers to run harmful code in rare configurations without     modern protections.

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.

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

    A flaw was found in the interactive shell of the xmllint command-line tool, used for parsing XML files.
    When a user inputs an overly long command, the program does not check the input size properly, which can     cause it to crash. This issue might allow attackers to run harmful code in rare configurations without     modern protections.(CVE-2025-6170)

    A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations     can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of     service when processing crafted input.(CVE-2025-6021)

    A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under     certain circumstances when the XML schematron has the sch:name path='...'/ schema elements. This     flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the     program's crash using libxml or other possible undefined behaviors.(CVE-2025-49794)

    A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can     trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that     can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to     sensitive data being corrupted in memory.(CVE-2025-49796)

Tenable has extracted the preceding description block directly from the EulerOS 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 installation on the remote host is affected by the following vulnerabilities :

    A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under     certain circumstances when the XML schematron has the sch:name path='...'/ schema elements. This     flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the     program's crash using libxml or other possible undefined behaviors.(CVE-2025-49794)

    A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can     trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that     can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to     sensitive data being corrupted in memory.(CVE-2025-49796)

    A flaw was found in the interactive shell of the xmllint command-line tool, used for parsing XML files.
    When a user inputs an overly long command, the program does not check the input size properly, which can     cause it to crash. This issue might allow attackers to run harmful code in rare configurations without     modern protections.(CVE-2025-6170)

    A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations     can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of     service when processing crafted input.(CVE-2025-6021)

Tenable has extracted the preceding description block directly from the EulerOS 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 version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2025:0653 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2025-6170:
    A flaw was found in the interactive shell of the xmllint command-line tool, used for parsing XML files.
    When a user inputs an overly long command, the program does not check the input size properly, which can     cause it to crash. This issue might allow attackers to run harmful code in rare configurations without     modern protections.

Tenable has extracted the preceding description block directly from the Tencent 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 flaw was found in the interactive shell of the xmllint command-line tool, used for parsing XML files.
    When a user inputs an overly long command, the program does not check the input size properly, which can     cause it to crash. This issue might allow attackers to run harmful code in rare configurations without     modern protections. (CVE-2025-6170)

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

The version of libxml2 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-2025-6170 advisory.

  - A flaw was found in the interactive shell of the xmllint command-line tool, used for parsing XML files.
    When a user inputs an overly long command, the program does not check the input size properly, which can     cause it to crash. This issue might allow attackers to run harmful code in rare configurations without     modern protections. (CVE-2025-6170)

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 libxml2 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-2025-6170 advisory.

  - A flaw was found in the interactive shell of the xmllint command-line tool, used for parsing XML files.
    When a user inputs an overly long command, the program does not check the input size properly, which can     cause it to crash. This issue might allow attackers to run harmful code in rare configurations without     modern protections. (CVE-2025-6170)

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 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4251 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-4251-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                       Guilhem Moulin     July 26, 2025                                 https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : libxml2     Version        : 2.9.10+dfsg-6.7+deb11u8     CVE ID         : CVE-2024-34459 CVE-2025-6021 CVE-2025-6170 CVE-2025-49794                      CVE-2025-49796     Debian Bug     : 1071162 1107720 1107755 1107938

    Multiple security issues were found in libxml2, the GNOME XML library,     which could yield to denial of service or potentially arbitrary code     execution.

    CVE-2024-34459

        Zhineng Zhong discovered that formatting error messages with `xmllint
        --htmlout` could result in a buffer over-read.

    CVE-2025-6021

        Ahmed Lekssays discovered an integer overflow issue in         `xmlBuildQName()` which could result in memory corruption or a         denial of service when processing crafted input.

    CVE-2025-6170

        Ahmed Lekssays discovered a stack-based buffer overflow issue in the         command-parsing logic of the interactive shell in xmllint.

    CVE-2025-49794

        Nikita Sveshnikov discovered a heap use-after-free issue in the         schematron.  When processing XPath expressions in Schematron schema         elements `<sch:name path=/>`, a pointer to freed memory is         returned and then accessed, leading to undefined behavior or         potential crashes.

    CVE-2025-49796

        Nikita Sveshnikov discovered a type confusion issue in the         schematron.  Processing `sch:name` elements and accessing namespace         information may lead to leading to memory corruption or undefined         behavior.

    For Debian 11 bullseye, these problems have been fixed in version     2.9.10+dfsg-6.7+deb11u8.

    We recommend that you upgrade your libxml2 packages.

    For the detailed security status of libxml2 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/libxml2

    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     Attachment:
    signature.asc     Description: PGP signature

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 SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:02355-1 advisory.

    - CVE-2025-49794: Fixed a heap use after free which could lead to denial of service. (bsc#1244554)
    - CVE-2025-49796: Fixed type confusion which could lead to denial of service. (bsc#1244557)
    - CVE-2025-6170: Fixed a stack buffer overflow which could lead to a crash. (bsc#1244700)
    - CVE-2025-6021: Fixed an integer overflow in xmlBuildQName() which could lead to stack buffer overflow.
    (bsc#1244590)

Tenable has extracted the preceding description block directly from the SUSE 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 SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:02314-1 advisory.

    - CVE-2025-49794: Fixed a heap use after free which could lead to denial of service. (bsc#1244554)
    - CVE-2025-49796: Fixed type confusion which could lead to denial of service. (bsc#1244557)
    - CVE-2025-49795: Fixed a null pointer dereference which could lead to denial of service. (bsc#1244555)
    - CVE-2025-6170: Fixed a stack buffer overflow which could lead to a crash. (bsc#1244700)
    - CVE-2025-6021: Fixed an integer overflow in xmlBuildQName() which could lead to stack buffer overflow.
    (bsc#1244590)

Tenable has extracted the preceding description block directly from the SUSE 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 version of libxml2 installed on the remote host is prior to 2.11.9. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2025-196-02 advisory.

    New libxml2 packages are available for Slackware 15.0 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 version of libxml2 installed on the remote host is prior to 2.11.9 / 2.14.5. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2025-196-01 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 version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the abbc8912-5efa-11f0-ae84-99047d0a6bcc advisory.

    Alan Coopersmith reports:
    As discussed in                 https://gitlab.gnome.org/GNOME/libxml2/-/issues/913 the               security policy of libxml2 has been changed to disclose vulnerabilities               before fixes are available so that people other than the maintainer can                 contribute to fixing security issues in this library.
    As part of this, the following 5 CVE's have been disclosed recently:
    (CVE-2025-49794) Heap use after free (UAF) leads to Denial of service (DoS)                 https://gitlab.gnome.org/GNOME/libxml2/-/issues/931 [...]     (CVE-2025-49795) Null pointer dereference leads to Denial of service (DoS)                 https://gitlab.gnome.org/GNOME/libxml2/-/issues/932 [...]     (CVE-2025-49796) Type confusion leads to Denial of service (DoS)                 https://gitlab.gnome.org/GNOME/libxml2/-/issues/933 [...]     For all three of the above, note that upstream is considering removing Schematron support completely, as     discussed in                 https://gitlab.gnome.org/GNOME/libxml2/-/issues/935.
    (CVE-2025-6021) Integer Overflow Leading to Buffer Overflow in xmlBuildQName()                 https://gitlab.gnome.org/GNOME/libxml2/-/issues/926 [...]     (CVE-2025-6170) Stack-based Buffer Overflow in xmllint Shell                 https://gitlab.gnome.org/GNOME/libxml2/-/issues/941 [...]

Tenable has extracted the preceding description block directly from the FreeBSD 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 SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:02294-1 advisory.

    - CVE-2025-49794: Fixed a heap use after free which could lead to denial of service. (bsc#1244554)
    - CVE-2025-49796: Fixed type confusion which could lead to denial of service. (bsc#1244557)
    - CVE-2025-6170: Fixed a stack buffer overflow which could lead to a crash. (bsc#1244700)
    - CVE-2025-6021: Fixed an integer overflow in xmlBuildQName() which could lead to stack buffer overflow.
    (bsc#1244590)

Tenable has extracted the preceding description block directly from the SUSE 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 SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:02275-1 advisory.

    - CVE-2025-49794: Fixed a heap use after free which could lead to denial of service. (bsc#1244554)
    - CVE-2025-49796: Fixed type confusion which could lead to denial of service. (bsc#1244557)
    - CVE-2025-6170: Fixed a stack buffer overflow which could lead to a crash. (bsc#1244700)
    - CVE-2025-6021: Fixed an integer overflow in xmlBuildQName() which could lead to stack buffer overflow.
    (bsc#1244590)

Tenable has extracted the preceding description block directly from the SUSE 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 SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:02260-1 advisory.

    - CVE-2025-49794: Fixed a heap use after free which could lead to denial of service. (bsc#1244554)
    - CVE-2025-49796: Fixed type confusion which could lead to denial of service. (bsc#1244557)
    - CVE-2025-49795: Fixed a null pointer dereference which could lead to denial of service. (bsc#1244555)
    - CVE-2025-6170: Fixed a stack buffer overflow which could lead to a crash. (bsc#1244700)
    - CVE-2025-6021: Fixed an integer overflow in xmlBuildQName() which could lead to stack buffer overflow.
    (bsc#1244590)

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

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

ID	Name	Product	Family	Severity
275599	Photon OS 5.0: Libxml2 PHSA-2025-5.0-0673	Nessus	PhotonOS Local Security Checks	low
271359	EulerOS 2.0 SP13 : libxml2 (EulerOS-SA-2025-2301)	Nessus	Huawei Local Security Checks	low
271346	EulerOS 2.0 SP13 : libxml2 (EulerOS-SA-2025-2269)	Nessus	Huawei Local Security Checks	low
270044	EulerOS 2.0 SP11 : libxml2 (EulerOS-SA-2025-2203)	Nessus	Huawei Local Security Checks	low
270025	EulerOS 2.0 SP11 : libxml2 (EulerOS-SA-2025-2235)	Nessus	Huawei Local Security Checks	low
269188	Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: libxml2 (UTSA-2025-986104)	Nessus	Unity Linux Local Security Checks	low
264449	EulerOS 2.0 SP12 : libxml2 (EulerOS-SA-2025-2048)	Nessus	Huawei Local Security Checks	low
264420	EulerOS 2.0 SP10 : libxml2 (EulerOS-SA-2025-2105)	Nessus	Huawei Local Security Checks	low
261883	EulerOS 2.0 SP12 : libxml2 (EulerOS-SA-2025-2017)	Nessus	Huawei Local Security Checks	low
261844	EulerOS 2.0 SP10 : libxml2 (EulerOS-SA-2025-2077)	Nessus	Huawei Local Security Checks	low
253468	TencentOS Server 4: libxml2 (TSSA-2025:0653)	Nessus	Tencent Local Security Checks	low
247785	Linux Distros Unpatched Vulnerability : CVE-2025-6170	Nessus	Misc.	low
243026	Azure Linux 3.0 Security Update: libxml2 (CVE-2025-6170)	Nessus	Azure Linux Local Security Checks	low
243023	CBL Mariner 2.0 Security Update: libxml2 (CVE-2025-6170)	Nessus	MarinerOS Local Security Checks	low
242881	Debian dla-4251 : libxml2 - security update	Nessus	Debian Local Security Checks	low
242308	SUSE SLES15 Security Update : libxml2 (SUSE-SU-2025:02355-1)	Nessus	SuSE Local Security Checks	low
242154	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : libxml2 (SUSE-SU-2025:02314-1)	Nessus	SuSE Local Security Checks	low
242145	Slackware Linux 15.0 libxml2 Multiple Vulnerabilities (SSA:2025-196-02)	Nessus	Slackware Local Security Checks	low
242135	Slackware Linux 15.0 / current libxml2 Multiple Vulnerabilities (SSA:2025-196-01)	Nessus	Slackware Local Security Checks	low
242030	FreeBSD : libxml2 -- multiple vulnerabilities (abbc8912-5efa-11f0-ae84-99047d0a6bcc)	Nessus	FreeBSD Local Security Checks	low
242016	SUSE SLES12 Security Update : libxml2 (SUSE-SU-2025:02294-1)	Nessus	SuSE Local Security Checks	low
241961	SUSE SLES15 / openSUSE 15 Security Update : libxml2 (SUSE-SU-2025:02275-1)	Nessus	SuSE Local Security Checks	low
241674	SUSE SLED15 / SLES15 Security Update : libxml2 (SUSE-SU-2025:02260-1)	Nessus	SuSE Local Security Checks	low

Detections

Analytics

CVE-2025-6170

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Tenable Plugins

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