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CVE-2009-4881

18
FAUCET Score

CVE-2009-4881 describes an integer overflow vulnerability in the GNU C Library's (glibc) __vstrfmon_l function, affecting glibc versions prior to 2.10.1. This flaw allows an unauthenticated attacker to trigger a denial of service (application crash) by providing a specially crafted format string. With a CVSS score of 5.0 (medium severity), it is relatively easy to exploit over a network, but only results in a denial of service. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.9CPE matchmatch criteria
cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*
1.00CPE matchmatch criteria
cpe:2.3:a:gnu:glibc:1.00:*:*:*:*:*:*:*
1.01CPE matchmatch criteria
cpe:2.3:a:gnu:glibc:1.01:*:*:*:*:*:*:*
1.02CPE matchmatch criteria
cpe:2.3:a:gnu:glibc:1.02:*:*:*:*:*:*:*
1.03CPE matchmatch criteria
cpe:2.3:a:gnu:glibc:1.03:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.02%
Probability of exploitation in next 30 days
EPSS Percentile
79.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0203 is in the 67th percentile among its peer group of 23,725 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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

Vendor Advisories (1)

redhatCVE-2009-4881

(32-bit): Integer overflow in the __vstrfmon_l function

Mar 25, 2008

References

security.gentoo.org / glsa/glsa-201011-01.xml
exchange.xforce.ibmcloud.com / vulnerabilities/59241
sources.redhat.com / bugzilla/show_bug.cgi
sourceware.org / git
debian.org / security/2010/dsa-2058
mandriva.com / security/advisories