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CVE-2020-10768

MEDIUM
5.5
CVSS Score
Published: September 15, 2020 at 11:13 PM UTC
Updated: June 17, 2026 at 02:48 AM UTC
2 products affected across 2 vendorsLinux KernelLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.4%

Description

A flaw was found in the Linux Kernel before 5.8-rc1 in the prctl() function, where it can be used to enable indirect branch speculation after it has been disabled. This call incorrectly reports it as being 'force disabled' when it is not and opens the system to Spectre v2 attacks. The highest threat from this vulnerability is to confidentiality.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
v < 5.8.0
Affected range stops below 5.8.0, so it looks safe — our inference, not a vendor statement
Linux Kernel· Linux Kernel
60%
v < 5.8-rc1
Affected range stops below 5.8-rc1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMIssue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10768
x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4d8df8cbb9156b0a0ab3f802b80cb5db57acc0bf

CVSS

5.5MEDIUMredhat
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-440NVD-CWE-noinfo

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