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CVE-2016-4804

22
FAUCET Score

CVE-2016-4804 describes a heap-based buffer overflow and an out-of-bounds heap read vulnerability in dosfstools versions prior to 4.0, affecting products like Canonical and openSUSE. An attacker can exploit this by providing a crafted filesystem, leading to a denial of service (crash) in the read_fat or get_fat functions. With a CVSS score of 6.2 (Medium), it requires local access and has low attack complexity, resulting in high availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, indicating a low current threat level.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.0.28CPE matchmatch criteria
cpe:2.3:a:dosfstools_project:dosfstools:*:*:*:*:*:*:*:*
42.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
13.2CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
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:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.2MEDIUM

CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.5
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.45%
Probability of exploitation in next 30 days
EPSS Percentile
36.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0045 is in the 68th percentile among its peer group of 3,048 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

Patch Available

Vendor Patches (4)

github_advisorypatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: dosfstools
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: dosfstools
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: dosfstools

Vendor Advisories (1)

redhatCVE-2016-4804Low

dosfstools: Heap-buffer-overflows in read_fat() and get_fat() functions

May 14, 2016

References

lists.opensuse.org / opensuse-updates/2016-06/msg00001.html
lists.opensuse.org / opensuse-updates/2016-09/msg00014.html
blog.fuzzing-project.org / 44-dosfstools-fsck.vfat-Several-invalid-memory-accesses.html
Patch
github.com / dosfstools/dosfstools/commit/e8eff147e9da1185f9afd5b25948153a3b97cf52
github.com / dosfstools/dosfstools/issues/25
PatchVendor Advisory
github.com / dosfstools/dosfstools/issues/26
PatchVendor Advisory
lists.debian.org / debian-lts-announce/2020/05/msg00028.html
securityfocus.com / bid/90311
ubuntu.com / usn/USN-2986-1