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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
Description
The load_segment_descriptor implementation in arch/x86/kvm/emulate.c in the Linux kernel before 4.9.5 improperly emulates a "MOV SS, NULL selector" instruction, which allows guest OS users to cause a denial of service (guest OS crash) or gain guest OS privileges via a crafted application.
Metrics
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CVE Modified by Red Hat, Inc.5/14/2024 12:36:33 AM
Action
Type
Old Value
New Value
CVE Modified by Red Hat, Inc.2/12/2023 6:29:01 PM
Action
Type
Old Value
New Value
Removed
CVSS V2
Red Hat, Inc. (AV:A/AC:M/Au:S/C:P/I:P/A:P)
Removed
CVSS V3
Red Hat, Inc. AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Changed
Description
Linux kernel built with the Kernel-based Virtual Machine (CONFIG_KVM) support was vulnerable to an incorrect segment selector(SS) value error. The error could occur while loading values into the SS register in long mode. A user or process inside a guest could use this flaw to crash the guest, resulting in DoS or potentially escalate their privileges inside the guest.
The load_segment_descriptor implementation in arch/x86/kvm/emulate.c in the Linux kernel before 4.9.5 improperly emulates a "MOV SS, NULL selector" instruction, which allows guest OS users to cause a denial of service (guest OS crash) or gain guest OS privileges via a crafted application.
CVE Modified by Red Hat, Inc.2/02/2023 10:17:20 AM
Action
Type
Old Value
New Value
Added
CVSS V2
Red Hat, Inc. (AV:A/AC:M/Au:S/C:P/I:P/A:P)
Added
CVSS V3
Red Hat, Inc. AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Changed
Description
The load_segment_descriptor implementation in arch/x86/kvm/emulate.c in the Linux kernel before 4.9.5 improperly emulates a "MOV SS, NULL selector" instruction, which allows guest OS users to cause a denial of service (guest OS crash) or gain guest OS privileges via a crafted application.
Linux kernel built with the Kernel-based Virtual Machine (CONFIG_KVM) support was vulnerable to an incorrect segment selector(SS) value error. The error could occur while loading values into the SS register in long mode. A user or process inside a guest could use this flaw to crash the guest, resulting in DoS or potentially escalate their privileges inside the guest.
OR
*cpe:2.3:o:linux:linux_kernel:4.9.4:*:*:*:*:*:*:* (and previous)
Added
CVSS V2
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Added
CVSS V3
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added
CWE
CWE-264
Changed
Reference Type
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=33ab91103b3415e12457e3104f0e4517ce12d0f3 No Types Assigned
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=33ab91103b3415e12457e3104f0e4517ce12d0f3 Third Party Advisory, Issue Tracking
Changed
Reference Type
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.5 No Types Assigned