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NVD / CVE Program· CNA redhat

CVE-2020-10768: 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…

MediumCVSS 5.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.39% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: linux (Debian:12) 5.7.6-1; linux-4.19 (Debian:9) 4.19.132-1~deb9u2; kernel-debug (openSUSE:Leap 15.1) 4.12.14-lp151.28.59.1.
  • Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to linux (Debian:12) 5.7.6-1; linux-4.19 (Debian:9) 4.19.132-1~deb9u2; kernel-debug (openSUSE:Leap 15.1) 4.12.14-lp151.28.59.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
Sep 15, 2020
Updated
Jun 16, 2026
EPSS
0.3% · 34th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CNA vs NVD score

NVD
5.5
CNA · redhat
5.5
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Kernel kernel

    • before 5.8-rc1affected

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernelbefore 5.8.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.7.6-15.7.6-1
Debian:9linux-4.19before 4.19.132-1~deb9u24.19.132-1~deb9u2
openSUSE:Leap 15.1kernel-debugbefore 4.12.14-lp151.28.59.14.12.14-lp151.28.59.1
openSUSE:Leap 15.1kernel-defaultbefore 4.12.14-lp151.28.59.14.12.14-lp151.28.59.1
openSUSE:Leap 15.1kernel-docsbefore 4.12.14-lp151.28.59.14.12.14-lp151.28.59.1
openSUSE:Leap 15.1kernel-kvmsmallbefore 4.12.14-lp151.28.59.14.12.14-lp151.28.59.1
openSUSE:Leap 15.1kernel-obs-buildbefore 4.12.14-lp151.28.59.14.12.14-lp151.28.59.1
openSUSE:Leap 15.1kernel-obs-qabefore 4.12.14-lp151.28.59.14.12.14-lp151.28.59.1
openSUSE:Leap 15.1kernel-sourcebefore 4.12.14-lp151.28.59.14.12.14-lp151.28.59.1
openSUSE:Leap 15.1kernel-symsbefore 4.12.14-lp151.28.59.14.12.14-lp151.28.59.1
openSUSE:Leap 15.1kernel-vanillabefore 4.12.14-lp151.28.59.14.12.14-lp151.28.59.1
openSUSE:Leap 15.2kernel-debugbefore 5.3.18-lp152.26.25.3.18-lp152.26.2
openSUSE:Leap 15.2kernel-defaultbefore 5.3.18-lp152.26.25.3.18-lp152.26.2
openSUSE:Leap 15.2kernel-default-basebefore 5.3.18-lp152.26.2.lp152.8.2.25.3.18-lp152.26.2.lp152.8.2.2
openSUSE:Leap 15.2kernel-docsbefore 5.3.18-lp152.26.25.3.18-lp152.26.2
openSUSE:Leap 15.2kernel-kvmsmallbefore 5.3.18-lp152.26.25.3.18-lp152.26.2
openSUSE:Leap 15.2kernel-obs-buildbefore 5.3.18-lp152.26.25.3.18-lp152.26.2
openSUSE:Leap 15.2kernel-obs-qabefore 5.3.18-lp152.26.25.3.18-lp152.26.2
openSUSE:Leap 15.2kernel-preemptbefore 5.3.18-lp152.26.25.3.18-lp152.26.2
openSUSE:Leap 15.2kernel-sourcebefore 5.3.18-lp152.26.25.3.18-lp152.26.2
openSUSE:Leap 15.2kernel-symsbefore 5.3.18-lp152.26.25.3.18-lp152.26.2
Red Hat:enterprise_linux:8::baseosbpftoolbefore 0:4.18.0-193.13.2.el8_20:4.18.0-193.13.2.el8_2
Red Hat:enterprise_linux:8::baseosbpftool-debuginfobefore 0:4.18.0-193.13.2.el8_20:4.18.0-193.13.2.el8_2
Red Hat:enterprise_linux:8::baseoskernelbefore 0:4.18.0-193.13.2.el8_20:4.18.0-193.13.2.el8_2

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2020-10766Sep 15, 2020 · A logic bug flaw was found in Linux kernel before 5.8-rc1 in the implementation of SSBD.
    22Monitor
  • ← EarlierCVE-2020-10767Sep 15, 2020 · A flaw was found in the Linux kernel before 5.8-rc1 in the implementation of the Enhanced IBPB (Indirect Branch Prediction Barrier).
    22Monitor
  • Later →CVE-2020-14304Sep 15, 2020 · A memory disclosure flaw was found in the Linux kernel's ethernet drivers, in the way it read data from the EEPROM of the device.
    17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:linux5.7.6-1 · Debian:12Package registry (OSV)
debian:linux-4.194.19.132-1~deb9u2 · Debian:9Package registry (OSV)
opensuse:kernel-debug5.3.18-lp152.26.2 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-default5.3.18-lp152.26.2 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-default-base5.3.18-lp152.26.2.lp152.8.2.2 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-docs5.3.18-lp152.26.2 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-kvmsmall5.3.18-lp152.26.2 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-obs-build5.3.18-lp152.26.2 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-obs-qa5.3.18-lp152.26.2 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-preempt5.3.18-lp152.26.2 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-source5.3.18-lp152.26.2 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-syms5.3.18-lp152.26.2 · openSUSE:Leap 15.2Package registry (OSV)
opensuse:kernel-vanilla4.12.14-lp151.28.59.1 · openSUSE:Leap 15.1Package registry (OSV)
red hat:bpftool0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-abi-whitelists0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-devel0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-modules0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-modules-extra0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debuginfo0:4.18.0-193.13.2.el8_2 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
suse:kernel-azure4.12.14-16.19.1 · SUSE:Linux Enterprise Server 12 SP5Package registry (OSV)
suse:kernel-default4.12.14-122.26.1 · SUSE:Linux Enterprise High Availability Extension 12 SP5Package registry (OSV)
suse:kernel-default-base5.3.18-24.9.1.9.2.6 · SUSE:Linux Enterprise Module for Basesystem 15 SP2Package registry (OSV)
suse:kernel-docs4.12.14-122.26.2 · SUSE:Linux Enterprise Software Development Kit 12 SP5Package registry (OSV)
suse:kernel-obs-build4.12.14-122.26.1 · SUSE:Linux Enterprise Software Development Kit 12 SP5Package registry (OSV)

+7

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: EPSS history · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-440 · Expected Behavior Violation

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records