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CVE-2004-0491

11
FAUCET Score

CVE-2004-0491 describes a flaw in the linux-2.4.21-mlock.patch for Red Hat Enterprise Linux 3. This vulnerability allows local users to bypass memory limits by manipulating the mlock page count, specifically when one process unlocks pages belonging to another. With a CVSS score of 2.1, this is a low-severity issue, requiring local access and user interaction to achieve a partial integrity impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:3.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

2.1LOW

AV:L/AC:L/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 33rd percentile among its peer group of 2,096 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.6 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: kernel-0:2.4.21-32.0.1.EL
View patch

Vendor Advisories (1)

redhatCVE-2004-0491Moderate

security flaw

Jun 21, 2004

References

patches.sgi.com / support/free/security/advisories/20060402-01-U
marc.info
bugzilla.redhat.com / bugzilla/show_bug.cgi
secunia.com / advisories/19607
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10672
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1117
redhat.com / support/errata/RHSA-2005-472.html
securityfocus.com / bid/13769