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    CVE-2015-7813

    Xen 4.4.x, 4.5.x, and 4.6.x does not limit the number of printk console messages when reporting unimplemented hypercalls, which allows local guests to cause a denial of service via a sequence of (1) HYPERVISOR_physdev_op hypercalls, which are not properly handled in the do_physdev_op function in arch/arm/physdev.c, or (2) HYPERVISOR_hvm_op hypercalls, which are not properly handled in the do_hvm_op function in arch/arm/hvm.c.

    Published:Oct 29, 2015
    Last Modified:Apr 12, 2025
    EPS:Oct 30, 2015
    EPSS Score:0.00109
    CVSS Score:2.1

    Affected Products

    Vendor
    Xen
    Product
    Xen

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    CVE-2026-62437 (CVSS 6.5) — When guests are terminated, various pieces of cleanup need carrying out. The cleaning up of PCI devices which …
    CVE-2026-62434 (CVSS 5.3) — A guest started with Populated on Demand enabled (PoD) can attempt to reclaim pages which aren't regular guest…
    CVE-2026-62433 (CVSS 7.3) — Parts of the DM_OP handling code assumes the caller has provided the required number of buffers for the given …
    CVE-2026-62432 (CVSS 7.3) — The EVTCHNOP_expand_array hypercall checks for whether FIFO event channels are enabled, but without holding th…
    CVE-2026-62431 (CVSS 7.5) — The logic to handle periodic Viridian STIMERs performs a division with an unchecked user-controlled divisor va…
    CVE-2026-62430 (CVSS 7.5) — Accesses to the CMOS memory contents are done using an indirect IO port pair. Therefore Xen needs to cache th…
    CVE-2026-62429 (CVSS 6.5) — Accessing the vNUMA configuration data of a guest is still possible when domain destruction has already starte…
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    References

    http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171082.html
    http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171185.html
    http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171249.html
    http://www.debian.org/security/2015/dsa-3414
    http://www.securitytracker.com/id/1034029
    http://xenbits.xen.org/xsa/advisory-146.html
    https://security.gentoo.org/glsa/201604-03
    http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171082.html
    http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171185.html
    http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171249.html
    http://www.debian.org/security/2015/dsa-3414
    http://www.securitytracker.com/id/1034029
    http://xenbits.xen.org/xsa/advisory-146.html
    https://security.gentoo.org/glsa/201604-03

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High