When guests are terminated, various pieces of cleanup need carrying out. The cleaning up of PCI devices which were assigned to guests, and the associated removal of tracking structures for IRQs used by the devices occurs relatively early in the process. Unfortunately after that point the guest about to be terminated could cause its device model (DM) to re-establish such tracking structures, by having it bind one or more IRQs anew. While some of those tracking structures would still be cleaned up later on, at least one would not be.

The remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4089-1 advisory.

    - CVE-2026-62437: x86: DMs may cause mem leak by IRQ binding (bsc#1276838).
    - CVE-2026-79602: x86: improper handling of HVM emulation return codes (bsc#1276839).

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-2026:4090-1 advisory.

    Update to version 4.20.3 (jsc#PED-8907).

    Security issues fixed:

    - CVE-2026-42493: x86 shadow paging is deprecated (bsc#1271528).
    - CVE-2026-42494,CVE-2026-42495,CVE-2026-62423,CVE-2026-62424,CVE-2026-62425: buffer overruns in     libfsimage iso9660       handling (bsc#1271530).
    - CVE-2026-62426,CVE-2026-62427: sysctl and platform-op locks open to abuse (bsc#1271531).
    - CVE-2026-62428: grant-table: type confusion in grant-copy (bsc#1271532).
    - CVE-2026-62429: vNUMA domain cleanup may race other operations (bsc#1271534).
    - CVE-2026-62430: x86: Out-of-bounds read in vRTC emulation (bsc#1271535).
    - CVE-2026-62431: Viridian STIMER division by zero (bsc#1271536).
    - CVE-2026-62432: evtchn: Race between FIFO expand and reset (bsc#1271537).
    - CVE-2026-62433: correct buffer checks for DM_OP hypercalls (bsc#1271538).
    - CVE-2026-62434: PoD: Don't try to reclaim special pages (bsc#1271539).
    - CVE-2026-62437: x86: DMs may cause mem leak by IRQ binding (bsc#1276838).
    - CVE-2026-79602: x86: improper handling of HVM emulation return codes (bsc#1276839).
    - CVE-2026-79603: unconditionally do TLB flushing ahead of page scrubbing (bsc#1276841).
    - pygrub is only supported in de-privileged mode (bsc#1271947).

    Non security issue fixed:

    - Xen: Missing 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.

When guests are terminated, various pieces of cleanup need carrying out. The cleaning up of PCI devices which were assigned to guests, and the associated removal of tracking structures for IRQs used by the devices occurs relatively early in the process. Unfortunately after that point the guest about to be terminated could cause its device model (DM) to re-establish such tracking structures, by having it bind one or more IRQs anew. While some of those tracking structures would still be cleaned up later on, at least one would not be.

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.

  - When guests are terminated, various pieces of cleanup need carrying out. The cleaning up of PCI devices     which were assigned to guests, and the associated removal of tracking structures for IRQs used by the     devices occurs relatively early in the process. Unfortunately after that point the guest about to be     terminated could cause its device model (DM) to re-establish such tracking structures, by having it bind     one or more IRQs anew. While some of those tracking structures would still be cleaned up later on, at     least one would not be. (CVE-2026-62437)

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

ID	Name	Product	Family	Type	Severity
348461	SUSE SLES12: xen / xen-devel / xen-doc-html / xen-libs / xen-libs-32bit / etc (SUSE-SU-2026:4089-1)	Nessus	SuSE Local Security Checks	Local	high
348432	SUSE SLED15: xen / xen-devel / xen-libs / xen-tools / xen-tools-domU / etc (SUSE-SU-2026:4090-1)	Nessus	SuSE Local Security Checks	Local	high
344804	Xen: x86 DMs May Cause Mem Leak by IRQ Binding (XSA-509)	Nessus	Misc.	Local	medium
343922	Linux Distros Unpatched Vulnerability : CVE-2026-62437	Nessus	Misc.	Local	medium

Detections

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CVE-2026-62437

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Tenable Plugins

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medium

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