util-linux: runuser tty hijack via TIOCSTI ioctl
Published Feb 7, 2017
8.6
HIGHCVSS 3.0
EPSS 0.39%
Description
runuser in util-linux allows local users to escape to the parent session via a crafted TIOCSTI ioctl call, which pushes characters to the terminal's input buffer.
Affected products
No data.
- 2.24.2-1
No data.
Red Hat Enterprise Linux 5
util-linux
Not affected
Red Hat Enterprise Linux 6
util-linux-ng
Not affected
Red Hat Enterprise Linux 7
util-linux
Will not fix
Red Hat Enterprise Linux 8
util-linux
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | util-linux | Not affected | n/a |
| Red Hat Enterprise Linux 6 | util-linux-ng | Not affected | n/a |
| Red Hat Enterprise Linux 7 | util-linux | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | util-linux | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the versions of util-linux as shipped with Red Hat Enterprise Linux 7. Red Hat Product Security has rated this issue as having Moderate security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
AV:L/AC:L/Au:N/C:C/I:C/A:C
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
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.39% (0.00386) | 30.23th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.39% (0.00386) | 30.16th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.16% (0.00158) | 34.08th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00890) | 30.33th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00890) | 28.64th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00890) | 26.62th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00890) | 12.04th | v2 (v2022.01.01) |
References (7)
- http://www.openwall.com/lists/oss-security/2016/02/27/1 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/02/27/2 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2016-2779 Vendor Advisory
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=815922 x_refsource_MISCIssue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1312852 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-2779
- https://www.cve.org/CVERecord?id=CVE-2016-2779
| Link | Providers | Tags |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2016/02/27/1 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| http://www.openwall.com/lists/oss-security/2016/02/27/2 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2016-2779 | Vendor Advisory | |
| https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=815922 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1312852 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-2779 | ||
| https://www.cve.org/CVERecord?id=CVE-2016-2779 |
Change history (0)
No recorded changes yet.