CVE-2004-0565

Floating point information leak in the context switch code for Linux 2.4.x only checks the MFH...

2.1 LowFix available

Floating point information leak in the context switch code for Linux 2.4.x only checks the MFH bit but does not verify the FPH owner, which allows local users to read register values of other processes by setting the MFH bit.

Exploit likelihood

0.44%Down 1.1 points since Feb 4, 2022

What each source reports

NVD Score used 2.1

Record: CVE-2004-0565
CVSS 2.0: 2.1 LowAV:L/AC:L/Au:N/C:P/I:N/A:N
Updated: 2026-11-02

CVE List No score

Record: CVE-2004-0565
Updated: 2026-11-02

EUVDEUVD-2004-0564 No score

Record: EUVD-2004-0564
Updated: 2026-11-03

GitHub AdvisoriesGHSA-g33f-v4ch-cw4g No score

Floating point information leak in the context switch code for Linux 2.4.x only checks the MFH...

Record: GHSA-g33f-v4ch-cw4g
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`kernel-source-2.4.16` Debian:3.0	before 2.4.16-1woody2	2.4.16-1woody2
`kernel-source-2.4.18` Debian:3.0	before 2.4.18-14.4, plus listed versions 2.4.18-14.3	2.4.18-14.4
`kernel-image-sparc-2.4` Debian:3.0	before 26woody1, plus listed versions 26	26woody1
`kernel-patch-2.4.19-mips` Debian:3.0	before 2.4.19-0.020911.1.woody5, plus listed versions 2.4.19-0.020911.1.woody4	2.4.19-0.020911.1.woody5
`kernel-source-2.4.19` Debian:3.0	before 2.4.19-4.woody3, plus listed versions 2.4.19-4.woody2	2.4.19-4.woody3
`kernel-source-2.4.17` Debian:3.0	before 2.4.17-1woody4, plus listed versions 2.4.17-1woody3	2.4.17-1woody4
`kernel` Red Hat:enterprise_linux:3::as	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-BOOT` Red Hat:enterprise_linux:3::as	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-debuginfo` Red Hat:enterprise_linux:3::as	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-doc` Red Hat:enterprise_linux:3::as	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL

Show 36 moreShow less

Affected packages
Package	Affected	Fixed
`kernel-hugemem` Red Hat:enterprise_linux:3::as	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-hugemem-unsupported` Red Hat:enterprise_linux:3::as	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-smp` Red Hat:enterprise_linux:3::as	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-smp-unsupported` Red Hat:enterprise_linux:3::as	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-source` Red Hat:enterprise_linux:3::as	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-unsupported` Red Hat:enterprise_linux:3::as	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel` Red Hat:enterprise_linux:3::desktop	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-BOOT` Red Hat:enterprise_linux:3::desktop	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-debuginfo` Red Hat:enterprise_linux:3::desktop	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-doc` Red Hat:enterprise_linux:3::desktop	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-hugemem` Red Hat:enterprise_linux:3::desktop	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-hugemem-unsupported` Red Hat:enterprise_linux:3::desktop	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-smp` Red Hat:enterprise_linux:3::desktop	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-smp-unsupported` Red Hat:enterprise_linux:3::desktop	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-source` Red Hat:enterprise_linux:3::desktop	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-unsupported` Red Hat:enterprise_linux:3::desktop	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel` Red Hat:enterprise_linux:3::es	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-BOOT` Red Hat:enterprise_linux:3::es	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-debuginfo` Red Hat:enterprise_linux:3::es	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-doc` Red Hat:enterprise_linux:3::es	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-hugemem` Red Hat:enterprise_linux:3::es	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-hugemem-unsupported` Red Hat:enterprise_linux:3::es	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-smp` Red Hat:enterprise_linux:3::es	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-smp-unsupported` Red Hat:enterprise_linux:3::es	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-source` Red Hat:enterprise_linux:3::es	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-unsupported` Red Hat:enterprise_linux:3::es	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel` Red Hat:enterprise_linux:3::ws	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-BOOT` Red Hat:enterprise_linux:3::ws	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-debuginfo` Red Hat:enterprise_linux:3::ws	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-doc` Red Hat:enterprise_linux:3::ws	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-hugemem` Red Hat:enterprise_linux:3::ws	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-hugemem-unsupported` Red Hat:enterprise_linux:3::ws	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-smp` Red Hat:enterprise_linux:3::ws	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-smp-unsupported` Red Hat:enterprise_linux:3::ws	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-source` Red Hat:enterprise_linux:3::ws	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL
`kernel-unsupported` Red Hat:enterprise_linux:3::ws	before 0:2.4.21-27.0.1.EL	0:2.4.21-27.0.1.EL

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2004-0565 is a low vulnerability (CVSS 2.1) in Gentoo Linux, published July 8, 2004. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.44%, the 38th percentile. Fixed in kernel-source-2.4.16 2.4.16-1woody2.

References

Show 47 moreShow less