kernel: Kernel memory disclosure and crash in tty layer
Published Feb 8, 2016
6.8
MEDIUMCVSS 3.0
EPSS 0.38%
Description
Race condition in the tty_ioctl function in drivers/tty/tty_io.c in the Linux kernel through 4.4.1 allows local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free and system crash) by making a TIOCGETD ioctl call during processing of a TIOCSETD ioctl call.
Affected products
No data.
- ≤ 4.4.1
No data.
Red Hat Enterprise Linux 5
kernel
Will not fix
Red Hat Enterprise Linux 6
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel-rt
Will not fix
Red Hat Enterprise MRG 2
realtime-kernel
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Will not fix | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects kernels in Red Hat Enterprise Linux 5, 6 and 7. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
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:N/UI:N/S:U/C:L/I:N/A:H
AV:L/AC:L/Au:N/C:P/I:N/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 | 0.38% (0.00382) | 29.85th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.38% (0.00382) | 29.82th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.02% (0.00023) | 3.64th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.16% (0.00158) | 53.58th | v3 (v2023.03.01) |
| Aug 22, 2023 | 0.16% (0.00158) | 51.64th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.11% (0.00111) | 42.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.69% (0.02686) | 82.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.69% (0.02686) | 81.17th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.69% (0.02686) | 62.66th | v2 (v2022.01.01) |
References (32)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5c17c861a357e9458001f021a7afa7aab9937439 x_refsource_CONFIRMVendor Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176464.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176484.html vendor-advisoryx_refsource_FEDORA
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html vendor-advisoryx_refsource_SUSE
- http://source.android.com/security/bulletin/2016-07-01.html x_refsource_CONFIRM
- http://www.debian.org/security/2016/dsa-3448 vendor-advisoryx_refsource_DEBIAN
- http://www.debian.org/security/2016/dsa-3503 vendor-advisoryx_refsource_DEBIAN
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html x_refsource_CONFIRM
- http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html x_refsource_CONFIRM
- http://www.securityfocus.com/bid/82950 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id/1035695 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/USN-2929-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2929-2 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2930-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2930-2 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2930-3 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2932-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2948-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2948-2 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2967-1 vendor-advisoryx_refsource_UBUNTU
- http://www.ubuntu.com/usn/USN-2967-2 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2016-0723 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1296253 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/5c17c861a357e9458001f021a7afa7aab9937439 x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2016-0723
- https://security-tracker.debian.org/tracker/CVE-2016-0723 x_refsource_CONFIRM
- https://support.f5.com/csp/article/K43650115 x_refsource_CONFIRM
- https://www.cve.org/CVERecord?id=CVE-2016-0723
Change history (0)
No recorded changes yet.