Certain instructions need intercepting and emulating by Xen. In some cases Xen emulates the instruction by replaying it, using an executable stub. Some instructions may raise an exception, which is supposed to be handled gracefully. Certain replayed instructions have additional logic to set up and recover the changes to the arithmetic flags. For replayed instructions where the flags recovery logic is used, the metadata for exception handling was incorrect, preventing Xen from handling the the exception gracefully, treating it as fatal instead.

fedora FEDORA-2025-d2a821d9d1: xen-4.19.3-1.fc41

vendor_unpatched cve-2025-27465: Unpatched CVEs for Debian Linux, Ubuntu Linux (cve-2025-27465)

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-ddaa63a0f5 advisory.

    update to xen-4.19.3     includes patches for     x86: Incorrect stubs exception handling for flags recovery [XSA-470,     CVE-2025-27465]     x86: Transitive Scheduler Attacks [XSA-471, CVE-2024-36350,     CVE-2024-36357]

Tenable has extracted the preceding description block directly from the Fedora 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 a vulnerability as referenced in the SUSE- SU-2025:02471-1 advisory.

    - CVE-2025-27465: Fixed incorrect stubs exception handling for flags recovery (XSA-470) (bsc#1244644)
    - Fixed more AMD transient execution attacks (XSA-471) (bsc#1246112)

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 SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:02325-1 advisory.

    - CVE-2024-36350, CVE-2024-36357: More AMD transient execution attacks (bsc#1246112, XSA-471)
    - CVE-2025-27465: Incorrect stubs exception handling for flags recovery (bsc#1244644, XSA-470)

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 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:02326-1 advisory.

    Security fixes:

    - CVE-2024-28956: Fixed Intel CPU: Indirect Target Selection (ITS) (XSA-469) (bsc#1243117)
    - CVE-2024-53241: Fixed Xen hypercall page unsafe against speculative attacks (XSA-466) (bsc#1234282)
    - CVE-2025-1713: Fixed deadlock potential with VT-d and legacy PCI device pass-through (XSA-467)     (bsc#1238043)
    - CVE-2024-36350, CVE-2024-36357: More AMD transient execution attacks (bsc#1246112, XSA-471)
    - CVE-2025-27465: Incorrect stubs exception handling for flags recovery (bsc#1244644, XSA-470)

    Other fixes:

    - Upstream bug fixes (bsc#1027519)

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 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:02319-1 advisory.

    - CVE-2024-36350, CVE-2024-36357: More AMD transient execution attacks (bsc#1246112, XSA-471)
    - CVE-2025-27465: Incorrect stubs exception handling for flags recovery (bsc#1244644, XSA-470)

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-2025:02316-1 advisory.

    - CVE-2024-36350, CVE-2024-36357: More AMD transient execution attacks (bsc#1246112, XSA-471)
    - CVE-2025-27465: Incorrect stubs exception handling for flags recovery (bsc#1244644, XSA-470)

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-2025:02315-1 advisory.

    - Update to Xen 4.20.1
    - CVE-2024-36350, CVE-2024-36357: More AMD transient execution attacks (bsc#1246112, XSA-471)
    - CVE-2025-27465: Incorrect stubs exception handling for flags recovery (bsc#1244644, XSA-470)

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.

According to its self-reported version number, the Xen hypervisor installed on the remote host is affected by a DoS vulnerability where An unprivileged guest can cause a hypervisor crash, causing a Denial of Service (DoS) of the entire host.

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
245578	Fedora 42 : xen (2025-ddaa63a0f5)	Nessus	Fedora Local Security Checks	medium
242655	SUSE SLES12 Security Update : xen (SUSE-SU-2025:02471-1)	Nessus	SuSE Local Security Checks	medium
242225	SUSE SLES15 Security Update : xen (SUSE-SU-2025:02325-1)	Nessus	SuSE Local Security Checks	medium
242214	SUSE SLES15 Security Update : xen (SUSE-SU-2025:02326-1)	Nessus	SuSE Local Security Checks	medium
242155	SUSE SLES15 Security Update : xen (SUSE-SU-2025:02319-1)	Nessus	SuSE Local Security Checks	medium
242153	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : xen (SUSE-SU-2025:02316-1)	Nessus	SuSE Local Security Checks	medium
242152	SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2025:02315-1)	Nessus	SuSE Local Security Checks	medium
241980	Citrix XenServer DOS (XSA-470)	Nessus	Misc.	high

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