CVE-2020-13844

Name: CVE-2020-13844
Creator: NVD / NIST
Published: 2020-06-08T23:15:10.047+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.50%

Last modified Jun 17, 2026

CVE-2020-13844 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Arm Armv8-A core implementations utilizing speculative execution past unconditional changes in control flow may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka "straight-line speculation.". EPSS estimates a 0.50% chance of exploitation in the next 30 days.

Description

Arm Armv8-A core implementations utilizing speculative execution past unconditional changes in control flow may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka "straight-line speculation."

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.50%

39.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-203

Affected Software

Vendor	Product	Versions
Arm	Cortex-A32 Firmware	All versions
Arm	Cortex-A35 Firmware	All versions
Arm	Cortex-A53 Firmware	All versions
Arm	Cortex-A57 Firmware	All versions
Arm	Cortex-A72 Firmware	All versions
Arm	Cortex-A73 Firmware	All versions
Arm	Cortex-A34 Firmware	All versions
Opensuse	Leap	15.1
Opensuse	Leap	15.2

References

http://lists.llvm.org/pipermail/llvm-dev/2020-June/142109.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00039.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00040.htmlMailing List, Third Party Advisory
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerabilityVendor Advisory
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/downloads/straight-line-speculationVendor Advisory
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/frequently-asked-questionsVendor Advisory
https://gcc.gnu.org/pipermail/gcc-patches/2020-June/547520.htmlPatch, Third Party Advisory
http://lists.llvm.org/pipermail/llvm-dev/2020-June/142109.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00039.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00040.htmlMailing List, Third Party Advisory
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerabilityVendor Advisory
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/downloads/straight-line-speculationVendor Advisory
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/frequently-asked-questionsVendor Advisory
https://gcc.gnu.org/pipermail/gcc-patches/2020-June/547520.htmlPatch, Third Party Advisory

Timeline

Published: Jun 8, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-13844?

How severe is CVE-2020-13844?

CVE-2020-13844 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.

How do I fix CVE-2020-13844?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-13844?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST