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    CVE-2018-10853

    A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest.

    Published:Jun 5, 2018
    Last Modified:Nov 21, 2024
    EPS:Sep 11, 2018
    EPSS Score:0.00048
    CVSS Score:7

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Extras Rt
    Vendor
    Redhat
    Product
    Rhel Tus

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00043.html
    https://access.redhat.com/errata/RHSA-2019:2029
    https://access.redhat.com/errata/RHSA-2019:2043
    https://access.redhat.com/errata/RHSA-2020:0036
    https://access.redhat.com/errata/RHSA-2020:0103
    https://access.redhat.com/errata/RHSA-2020:0179
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10853
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=129a72a0d3c8e139a04512325384fe5ac119e74
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c9fa24ca7c9c47605672916491f79e8ccacb9e6
    https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html
    https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html
    https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html
    https://usn.ubuntu.com/3777-1/
    https://usn.ubuntu.com/3777-2/
    https://www.openwall.com/lists/oss-security/2018/09/02/1
    http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00043.html
    https://access.redhat.com/errata/RHSA-2019:2029
    https://access.redhat.com/errata/RHSA-2019:2043
    https://access.redhat.com/errata/RHSA-2020:0036
    https://access.redhat.com/errata/RHSA-2020:0103
    https://access.redhat.com/errata/RHSA-2020:0179
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10853
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=129a72a0d3c8e139a04512325384fe5ac119e74
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c9fa24ca7c9c47605672916491f79e8ccacb9e6
    https://lists.debian.org/debian-lts-announce/2018/07/msg00015.html
    https://lists.debian.org/debian-lts-announce/2018/07/msg00016.html
    https://lists.debian.org/debian-lts-announce/2018/07/msg00020.html
    https://usn.ubuntu.com/3777-1/
    https://usn.ubuntu.com/3777-2/
    https://www.openwall.com/lists/oss-security/2018/09/02/1

    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