HIGH
w3m: Null pointer dereference in formUpdateBuffer in form.c
Published Jan 25, 2018
7.5
HIGHCVSS 3.0
EPSS 4.39%
Description
w3m through 0.5.3 is prone to a NULL pointer dereference flaw in formUpdateBuffer in form.c.
Affected products
No data.
Configuration 2
OR
- 12.04
- 14.04
- 16.04
- 17.10
No data.
Red Hat Enterprise Linux 5
w3m
Will not fix
Red Hat Enterprise Linux 6
w3m
Will not fix
Red Hat Enterprise Linux 8
w3m
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | w3m | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | w3m | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | w3m | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
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
1 other source (Red Hat) ▾
3.3 LOW Red Hat
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact Low
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
4.39% 0.04391
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.04391
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 4.39% (0.04391) | 91.02th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.44% (0.04436) | 90.11th | v5 (v2026.06.15) |
| Apr 13, 2026 | 0.52% (0.00523) | 66.92th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.68% (0.00682) | 80.22th | v3 (v2023.03.01) |
| Feb 27, 2024 | 0.68% (0.00682) | 79.44th | v3 (v2023.03.01) |
| Aug 20, 2023 | 0.68% (0.00682) | 77.43th | v3 (v2023.03.01) |
| Jun 17, 2023 | 0.97% (0.00965) | 81.13th | v3 (v2023.03.01) |
| May 8, 2023 | 1.38% (0.01375) | 84.24th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.67% (0.01674) | 85.68th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.11% (0.01108) | 55.18th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.11% (0.01108) | 53.57th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.11% (0.01108) | 51.54th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.11% (0.01108) | 29.61th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.66% (0.01659) | 34.20th | v1 |
| Jan 6, 2022 | 1.66% (0.01659) | 33.50th | v1 |
| Sep 1, 2021 | 1.66% (0.01659) | 73.96th | v1 |
| Apr 14, 2021 | 1.66% (0.01659) | 0.00th | v1 |
Weaknesses (2)
References (11)
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00028.html vendor-advisoryx_refsource_SUSE
- http://www.securityfocus.com/bid/102846 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-6197 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1539151 Issue Tracking
- https://github.com/tats/w3m/commit/7fdc83b0364005a0b5ed869230dd81752ba022e8 x_refsource_CONFIRMPatchThird Party Advisory
- https://github.com/tats/w3m/issues/89 x_refsource_CONFIRMExploitPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/04/msg00025.html mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2018-6197
- https://usn.ubuntu.com/3555-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3555-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-6197
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00028.html | vendor-advisoryx_refsource_SUSE | |
| http://www.securityfocus.com/bid/102846 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2018-6197 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1539151 | Issue Tracking | |
| https://github.com/tats/w3m/commit/7fdc83b0364005a0b5ed869230dd81752ba022e8 | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://github.com/tats/w3m/issues/89 | x_refsource_CONFIRMExploitPatchThird Party Advisory | |
| https://lists.debian.org/debian-lts-announce/2020/04/msg00025.html | mailing-listx_refsource_MLIST | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-6197 | ||
| https://usn.ubuntu.com/3555-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://usn.ubuntu.com/3555-2/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2018-6197 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jan 25, 2018
Updated Aug 5, 2024
Reserved Jan 24, 2018
Link CVE-2018-6197
CISA Vulnrichment
Updated n/a