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Vulnerability record · CVE-2020-13844 · published 8 June 2020

CVE-2020-13844: Arm cortex-a32 firmware observable discrepancy vulnerability

Arm · Cortex A32 Firmware

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."

5.5 CVSS 3.1 Medium EPSS 0.49% · top 60.4% CWE-203 · Observable discrepancy
5.5CVSS 3.1 base score, v2 2.1
0.49%EPSS exploitation probability, 30 days
NoNot in CISA KEV
8Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

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."

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

Affected products

8 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2022-48251Arm cortex-a53 firmware observable discrepancy vulnerabilityThe AES instructions on the ARMv8 platform do not have an algorithm that is "intrinsically resistant" to side-channel attacks. NOTE: the vendor repor…EPSS 0.83%5.6CVE-2022-23960Xen vulnerabilityCertain Arm Cortex and Neoverse processors through 2022-03-08 do not properly restrict cache speculation, aka Spectre-BHB. An attacker can leverage t…EPSS 0.50%5.1CVE-2024-10929Arm cortex-a57 firmware observable discrepancy vulnerabilityIn certain circumstances, an issue in Arm Cortex-A57, Cortex-A72 (revisions before r1p0), Cortex-A73 and Cortex-A75 may allow an adversary to gain a …EPSS 0.17%4.7CVE-2022-25368Amperecomputing ampere altra max firmware vulnerabilitySpectre BHB is a variant of Spectre-v2 in which malicious code uses the shared branch history (stored in the CPU BHB) to influence mispredicted branc…EPSS 0.30%5.3CVE-2024-39891Twilio Authy API phone number enumeration via observable discrepancyAn unauthenticated endpoint in the Twilio Authy API, reachable through Authy Android before 25.1.0 and Authy iOS before 26.1.0, accepted streams of p…KEVEPSS 1.7%analysed

Source: NIST National Vulnerability Database (record CVE-2020-13844), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.