libvncserver: integer overflow in vcSetXCutTextProc in VNConsole.c
Published Feb 19, 2018
9.8
CRITICALCVSS 3.0
EPSS 2.28%
Description
An issue was discovered in vcSetXCutTextProc() in VNConsole.c in LinuxVNC and VNCommand from the LibVNC/vncterm distribution through 0.9.10. Missing sanitization of the client-specified message length may cause integer overflow or possibly have unspecified other impact via a specially crafted VNC packet.
Affected products
No data.
- ≤ 0.9.10
No data.
Red Hat Enterprise Linux 6
libvncserver
Not affected
Red Hat Enterprise Linux 7
libvncserver
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | libvncserver | Not affected | n/a |
| Red Hat Enterprise Linux 7 | libvncserver | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of libvncserver as shipped with Red Hat Enterprise Linux 6 and 7.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.28% (0.02280) | 82.51th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.36% (0.02360) | 81.51th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.32% (0.00315) | 70.61th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.32% (0.00315) | 69.52th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.32% (0.00315) | 65.57th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Sep 2, 2022 | 0.95% (0.00954) | 34.50th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00954) | 32.50th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.83% (0.00833) | 24.58th | v1 |
| Jan 6, 2022 | 0.83% (0.00833) | 23.96th | v1 |
| Sep 1, 2021 | 0.83% (0.00833) | 57.50th | v1 |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
References (7)
- http://openwall.com/lists/oss-security/2018/02/18/2 x_refsource_MISCMailing List
- https://access.redhat.com/security/cve/CVE-2018-7226 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1549172 Issue Tracking
- https://github.com/LibVNC/vncterm/issues/6 x_refsource_MISCPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-7226
- https://security.gentoo.org/glsa/201908-05 vendor-advisoryx_refsource_GENTOO
- https://www.cve.org/CVERecord?id=CVE-2018-7226
| Link | Providers | Tags |
|---|---|---|
| http://openwall.com/lists/oss-security/2018/02/18/2 | x_refsource_MISCMailing List | |
| https://access.redhat.com/security/cve/CVE-2018-7226 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1549172 | Issue Tracking | |
| https://github.com/LibVNC/vncterm/issues/6 | x_refsource_MISCPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-7226 | ||
| https://security.gentoo.org/glsa/201908-05 | vendor-advisoryx_refsource_GENTOO | |
| https://www.cve.org/CVERecord?id=CVE-2018-7226 |
Change history (0)
No recorded changes yet.