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CVE-2007-4137

20
FAUCET Score

CVE-2007-4137 describes an off-by-one error in the QUtf8Decoder::toUnicode function within Trolltech Qt 3, leading to a heap-based buffer overflow when processing a crafted Unicode string, which can cause a denial of service (crash). This vulnerability affects various Linux distributions including Conectiva, Gentoo, Mandrakesoft, Red Hat, and Ubuntu, in addition to Trolltech Qt itself. With a CVSS score of 7.5, it is considered highly severe, allowing unauthenticated attackers over the network to achieve partial confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.0CPE matchmatch criteria
cpe:2.3:a:trolltech:qt:3.0:*:*:*:*:*:*:*
3.0.3CPE matchmatch criteria
cpe:2.3:a:trolltech:qt:3.0.3:*:*:*:*:*:*:*
3.0.5CPE matchmatch criteria
cpe:2.3:a:trolltech:qt:3.0.5:*:*:*:*:*:*:*
3.1CPE matchmatch criteria
cpe:2.3:a:trolltech:qt:3.1:*:*:*:*:*:*:*
3.1.1CPE matchmatch criteria
cpe:2.3:a:trolltech:qt:3.1.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.34%
Probability of exploitation in next 30 days
EPSS Percentile
81.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0234 is in the 68th percentile among its peer group of 51,506 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, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 2.1Fixed in: qt-1:2.3.1-14.EL2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: qt-1:3.1.2-17.RHEL3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: qt-1:3.3.3-13.RHEL4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: qt-1:3.3.6-23.el5
View patch

Vendor Advisories (1)

redhatCVE-2007-4137Important

QT off by one buffer overflow

Sep 3, 2007

References

patches.sgi.com / support/free/security/advisories/20070901-01-P.asc
bugs.gentoo.org / show_bug.cgi
dist.trolltech.com / developer/download/175791_3.diff
dist.trolltech.com / developer/download/175791_4.diff
fedoranews.org / updates/FEDORA-2007-221.shtml
fedoranews.org / updates/FEDORA-2007-703.shtml
osvdb.org / 39384
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/26778
Vendor Advisory
secunia.com / advisories/26782
Vendor Advisory
secunia.com / advisories/26804
secunia.com / advisories/26811
Vendor Advisory
secunia.com / advisories/26857
secunia.com / advisories/26868
secunia.com / advisories/26882
secunia.com / advisories/26987
secunia.com / advisories/27053
secunia.com / advisories/27275
secunia.com / advisories/27382
secunia.com / advisories/27996
secunia.com / advisories/28021
security.gentoo.org / glsa/glsa-200710-28.xml
security.gentoo.org / glsa/glsa-200712-08.xml
securitytracker.com / id
issues.rpath.com / browse/RPL-1751
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11159
support.avaya.com / elmodocs2/security/ASA-2007-424.htm
trolltech.com / company/newsroom/announcements/press.2007-09-03.7564032119
debian.org / security/2007/dsa-1426
mandriva.com / security/advisories
novell.com / linux/security/advisories/2007_19_sr.html
redhat.com / support/errata/RHSA-2007-0883.html
securityfocus.com / archive/1/481498/100/0/threaded
securityfocus.com / bid/25657
ubuntu.com / usn/usn-513-1
vupen.com / english/advisories/2007/3144