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CVE-2004-0491

The linux-2.4.21-mlock.patch in Red Hat Enterprise Linux 3 does not properly maintain the mlock...

2.1 Low

The linux-2.4.21-mlock.patch in Red Hat Enterprise Linux 3 does not properly maintain the mlock page count when one process unlocks pages that belong to another process, which allows local users to mlock more memory than specified by the rlimit.

Exploit likelihood

0.36%Down 0.7 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 2.1

The linux-2.4.21-mlock.patch in Red Hat Enterprise Linux 3 does not properly maintain the mlock page count when one process unlocks pages that belong to another process, which allows local users to mlock more memory than specified by the rlimit.

Record
CVE-2004-0491
CVSS 2.0
2.1 LowAV:L/AC:L/Au:N/C:N/I:P/A:N
Updated
2026-11-02
CVE List No score

The linux-2.4.21-mlock.patch in Red Hat Enterprise Linux 3 does not properly maintain the mlock page count when one process unlocks pages that belong to another process, which allows local users to mlock more memory than specified by the rlimit.

Record
CVE-2004-0491
Updated
2026-11-02
EUVDEUVD-2004-0490 No score

The linux-2.4.21-mlock.patch in Red Hat Enterprise Linux 3 does not properly maintain the mlock page count when one process unlocks pages that belong to another process, which allows local users to mlock more memory than specified by the rlimit.

Record
EUVD-2004-0490
Updated
2026-11-03
GitHub AdvisoriesGHSA-f79w-jc47-24f4 No score

The linux-2.4.21-mlock.patch in Red Hat Enterprise Linux 3 does not properly maintain the mlock...

The linux-2.4.21-mlock.patch in Red Hat Enterprise Linux 3 does not properly maintain the mlock page count when one process unlocks pages that belong to another process, which allows local users to mlock more memory than specified by the rlimit.

Record
GHSA-f79w-jc47-24f4
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
kernel
Red Hat:enterprise_linux:3::as
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-BOOT
Red Hat:enterprise_linux:3::as
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-debuginfo
Red Hat:enterprise_linux:3::as
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-doc
Red Hat:enterprise_linux:3::as
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-hugemem
Red Hat:enterprise_linux:3::as
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-hugemem-unsupported
Red Hat:enterprise_linux:3::as
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-smp
Red Hat:enterprise_linux:3::as
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-smp-unsupported
Red Hat:enterprise_linux:3::as
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-source
Red Hat:enterprise_linux:3::as
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-unsupported
Red Hat:enterprise_linux:3::as
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
Show 30 moreShow less
Affected packages
PackageAffectedFixed
kernel
Red Hat:enterprise_linux:3::desktop
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-BOOT
Red Hat:enterprise_linux:3::desktop
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-debuginfo
Red Hat:enterprise_linux:3::desktop
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-doc
Red Hat:enterprise_linux:3::desktop
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-hugemem
Red Hat:enterprise_linux:3::desktop
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-hugemem-unsupported
Red Hat:enterprise_linux:3::desktop
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-smp
Red Hat:enterprise_linux:3::desktop
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-smp-unsupported
Red Hat:enterprise_linux:3::desktop
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-source
Red Hat:enterprise_linux:3::desktop
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-unsupported
Red Hat:enterprise_linux:3::desktop
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel
Red Hat:enterprise_linux:3::es
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-BOOT
Red Hat:enterprise_linux:3::es
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-debuginfo
Red Hat:enterprise_linux:3::es
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-doc
Red Hat:enterprise_linux:3::es
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-hugemem
Red Hat:enterprise_linux:3::es
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-hugemem-unsupported
Red Hat:enterprise_linux:3::es
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-smp
Red Hat:enterprise_linux:3::es
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-smp-unsupported
Red Hat:enterprise_linux:3::es
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-source
Red Hat:enterprise_linux:3::es
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-unsupported
Red Hat:enterprise_linux:3::es
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel
Red Hat:enterprise_linux:3::ws
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-BOOT
Red Hat:enterprise_linux:3::ws
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-debuginfo
Red Hat:enterprise_linux:3::ws
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-doc
Red Hat:enterprise_linux:3::ws
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-hugemem
Red Hat:enterprise_linux:3::ws
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-hugemem-unsupported
Red Hat:enterprise_linux:3::ws
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-smp
Red Hat:enterprise_linux:3::ws
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-smp-unsupported
Red Hat:enterprise_linux:3::ws
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-source
Red Hat:enterprise_linux:3::ws
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL
kernel-unsupported
Red Hat:enterprise_linux:3::ws
From an advisory covering 3 CVEs
 before 0:2.4.21-32.0.1.EL
0:2.4.21-32.0.1.EL

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2004-0491 is a low vulnerability (CVSS 2.1) in Redhat Enterprise Linux, published December 31, 2004. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.36%, the 30th percentile. No source names a fixed version.

References

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