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.

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 AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2025:10699 advisory.

    * libxml: Heap use after free (UAF) leads to Denial of service (DoS) (CVE-2025-49794)
      * libxml: Type confusion leads to Denial of service (DoS) (CVE-2025-49796)
      * libxml2: Integer Overflow in xmlBuildQName() Leads to Stack Buffer Overflow in libxml2 (CVE-2025-6021)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2025:10698 advisory.

    * libxml: Heap use after free (UAF) leads to Denial of service (DoS) (CVE-2025-49794)
      * libxml: Type confusion leads to Denial of service (DoS) (CVE-2025-49796)
      * libxml2: Integer Overflow in xmlBuildQName() Leads to Stack Buffer Overflow in libxml2 (CVE-2025-6021)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2025-10698 advisory.

    - Fix CVE-2025-6021 (RHEL-96498)
    - Fix CVE-2025-49794 (RHEL-96398)
    - Fix CVE-2025-49796 (RHEL-96424)

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

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2025-10699 advisory.

    - Fix CVE-2025-6021 (RHEL-96507)
    - Fix CVE-2025-49794 (RHEL-96405)

Tenable has extracted the preceding description block directly from the Oracle Linux 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 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:10698 advisory.

    The libxml2 library is a development toolbox providing the implementation of various XML standards.

    Security Fix(es):

    * libxml: Heap use after free (UAF) leads to Denial of service (DoS) (CVE-2025-49794)

    * libxml: Type confusion leads to Denial of service (DoS) (CVE-2025-49796)

    * libxml2: Integer Overflow in xmlBuildQName() Leads to Stack Buffer Overflow in libxml2 (CVE-2025-6021)

    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 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 multiple vulnerabilities as referenced in the RHSA-2025:10699 advisory.

    The libxml2 library is a development toolbox providing the implementation of various XML standards.

    Security Fix(es):

    * libxml: Heap use after free (UAF) leads to Denial of service (DoS) (CVE-2025-49794)

    * libxml: Type confusion leads to Denial of service (DoS) (CVE-2025-49796)

    * libxml2: Integer Overflow in xmlBuildQName() Leads to Stack Buffer Overflow in libxml2 (CVE-2025-6021)

    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 these issues 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 multiple vulnerabilities as referenced in the ELSA-2025-10630 advisory.

    - Fix CVE-2025-6021 (RHEL-96495)
    - Fix CVE-2025-49794 (RHEL-96395)
    - Fix CVE-2025-49795 (RHEL-96408)

Tenable has extracted the preceding description block directly from the Oracle Linux 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 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2025:10630 advisory.

    The libxml2 library is a development toolbox providing the implementation of various XML standards.

    Security Fix(es):

    * libxml: Heap use after free (UAF) leads to Denial of service (DoS) (CVE-2025-49794)

    * libxml: Null pointer dereference leads to Denial of service (DoS) (CVE-2025-49795)

    * libxml: Type confusion leads to Denial of service (DoS) (CVE-2025-49796)

    * libxml2: Integer Overflow in xmlBuildQName() Leads to Stack Buffer Overflow in libxml2 (CVE-2025-6021)

    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 these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
242016	SUSE SLES12 Security Update : libxml2 (SUSE-SU-2025:02294-1)	Nessus	SuSE Local Security Checks	low
242003	AlmaLinux 9 : libxml2 (ALSA-2025:10699)	Nessus	Alma Linux Local Security Checks	critical
241968	AlmaLinux 8 : libxml2 (ALSA-2025:10698)	Nessus	Alma Linux Local Security Checks	critical
241961	SUSE SLES15 / openSUSE 15 Security Update : libxml2 (SUSE-SU-2025:02275-1)	Nessus	SuSE Local Security Checks	low
241688	Oracle Linux 8 : libxml2 (ELSA-2025-10698)	Nessus	Oracle Linux Local Security Checks	critical
241674	SUSE SLED15 / SLES15 Security Update : libxml2 (SUSE-SU-2025:02260-1)	Nessus	SuSE Local Security Checks	low
241670	Oracle Linux 9 : libxml2 (ELSA-2025-10699)	Nessus	Oracle Linux Local Security Checks	critical
241659	RHEL 8 : libxml2 (RHSA-2025:10698)	Nessus	Red Hat Local Security Checks	critical
241658	RHEL 9 : libxml2 (RHSA-2025:10699)	Nessus	Red Hat Local Security Checks	critical
241634	Oracle Linux 10 : libxml2 (ELSA-2025-10630)	Nessus	Oracle Linux Local Security Checks	critical
241600	RHEL 10 : libxml2 (RHSA-2025:10630)	Nessus	Red Hat Local Security Checks	critical

Detections

Analytics

CVE-2025-49796

critical

Tenable Plugins

low

critical

critical

low

critical

low

critical

critical

critical

critical

critical