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CVE-2015-1803

25
FAUCET Score

CVE-2015-1803 is a denial-of-service vulnerability in X.Org libXfont, affecting versions before 1.4.9 and 1.5.x before 1.5.1, including various Debian and Ubuntu distributions. A remote authenticated attacker can trigger a NULL pointer dereference and crash, potentially leading to arbitrary code execution, by providing a malformed BDF font file. This vulnerability has a high CVSS score of 8.5, indicating a severe risk with network access, medium attack complexity, and complete impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
10.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:lts:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
14.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

8.5HIGH

AV:N/AC:M/Au:S/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
SINGLE
Exploitability Score
6.8
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.90%
Probability of exploitation in next 30 days
EPSS Percentile
91.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0490 is in the 90th percentile among its peer group of 1,162 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 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 (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libXfont-0:1.4.5-5.el6_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libXfont-0:1.4.7-3.ael7b_1
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libXfont

Vendor Advisories (1)

redhatCVE-2015-1803Low

libXfont: crash on invalid read in bdfReadCharacters

Mar 17, 2015

References

advisories.mageia.org / MGASA-2015-0113.html
lists.fedoraproject.org / pipermail/package-announce/2015-March/152497.html
lists.fedoraproject.org / pipermail/package-announce/2015-March/152838.html
lists.opensuse.org / opensuse-security-announce/2015-03/msg00032.html
lists.opensuse.org / opensuse-security-announce/2015-04/msg00002.html
lists.opensuse.org / opensuse-security-announce/2015-04/msg00005.html
rhn.redhat.com / errata/RHSA-2015-1708.html
security.gentoo.org / glsa/201507-21
debian.org / security/2015/dsa-3194
mandriva.com / security/advisories
oracle.com / technetwork/topics/security/bulletinapr2015-2511959.html
oracle.com / technetwork/topics/security/cpujul2015-2367936.html
securityfocus.com / bid/73280
securitytracker.com / id/1031935
ubuntu.com / usn/USN-2536-1
x.org / wiki/Development/Security/Advisory-2015-03-17
Vendor Advisory