CVE-2020-10766
MEDIUMLinux Kernel < 5.8.0 - Speculative Execution Mitigation Bypass via SSBD Logic Flaw
Title source: llmDescription
A logic bug flaw was found in Linux kernel before 5.8-rc1 in the implementation of SSBD. A bug in the logic handling allows an attacker with a local account to disable SSBD protection during a context switch when additional speculative execution mitigations are in place. This issue was introduced when the per task/process conditional STIPB switching was added on top of the existing SSBD switching. The highest threat from this vulnerability is to confidentiality.
References (2)
Core 2
Core References
Issue Tracking, Third Party Advisory x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10766
Patch, Vendor Advisory x_refsource_misc
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dbbe2ad02e9df26e372f38cc3e70dab9222c832e
Scores
CVSS v3
5.5
EPSS
0.0047
EPSS Percentile
38.1%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Details
CWE
CWE-440
Status
published
Products (1)
linux/linux_kernel
< 5.8.0
Published
Sep 15, 2020
Tracked Since
Feb 18, 2026