CVE-2020-13844

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-06-08 · updated 2026-06-17
Weakness: CWE-203

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."

Affected products

Arm Cortex-A32 Firmware: all versions
Arm Cortex-A34 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
openSUSE Leap: 15.1, 15.2

References

http://lists.llvm.org/pipermail/llvm-dev/2020-June/142109.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00039.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00040.html
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/downloads/straight-line-speculation
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/frequently-asked-questions
https://gcc.gnu.org/pipermail/gcc-patches/2020-June/547520.html
http://lists.llvm.org/pipermail/llvm-dev/2020-June/142109.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00039.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00040.html
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability
https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/downloads/straight-line-speculation

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