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CVE-2018-6197

26
FAUCET Score

CVE-2018-6197 describes a NULL pointer dereference vulnerability in w3m through version 0.5.3, affecting Canonical and Tats distributions of w3m and Ubuntu Linux. This high-severity flaw (CVSS 7.5) can be exploited remotely with low complexity, leading to a denial of service. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.5.3CPE matchmatch criteria
cpe:2.3:a:tats:w3m:*:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
16.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
17.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.39%
Probability of exploitation in next 30 days
EPSS Percentile
90.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0439 is in the 83rd percentile among its peer group of 51,485 CVEs.

Social Chatter

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 (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: w3m
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: w3m

Vendor Advisories (1)

redhatCVE-2018-6197Low

w3m: Null pointer dereference in formUpdateBuffer in form.c

Jan 26, 2018

References

lists.opensuse.org / opensuse-security-announce/2019-04/msg00028.html
github.com / tats/w3m/commit/7fdc83b0364005a0b5ed869230dd81752ba022e8
PatchThird Party Advisory
github.com / tats/w3m/issues/89
ExploitPatchThird Party Advisory
lists.debian.org / debian-lts-announce/2020/04/msg00025.html
usn.ubuntu.com / 3555-1
Third Party Advisory
usn.ubuntu.com / 3555-2
Third Party Advisory
securityfocus.com / bid/102846
Third Party AdvisoryVDB Entry