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CVE-2011-5321

The tty_open function in drivers/tty/tty_io.c in the Linux kernel before 3.1.1 mishandles a...

5.5 MediumFix available

The tty_open function in drivers/tty/tty_io.c in the Linux kernel before 3.1.1 mishandles a driver-lookup failure, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via crafted access to a device file under the /dev/pts directory.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.37%Down 0.7 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 5.5

The tty_open function in drivers/tty/tty_io.c in the Linux kernel before 3.1.1 mishandles a driver-lookup failure, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via crafted access to a device file under the /dev/pts directory.

Record
CVE-2011-5321
CVSS 3.0
5.5 MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
4.9 MediumAV:L/AC:L/Au:N/C:N/I:N/A:C
Updated
2026-11-02
CVE List No score

The tty_open function in drivers/tty/tty_io.c in the Linux kernel before 3.1.1 mishandles a driver-lookup failure, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via crafted access to a device file under the /dev/pts directory.

Record
CVE-2011-5321
Updated
2026-11-02
EUVDEUVD-2011-5220 No score

The tty_open function in drivers/tty/tty_io.c in the Linux kernel before 3.1.1 mishandles a driver-lookup failure, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via crafted access to a device file under the /dev/pts directory.

Record
EUVD-2011-5220
Updated
2026-11-03
GitHub AdvisoriesGHSA-w32m-rx9f-gjv3 5.5

The tty_open function in drivers/tty/tty_io.c in the Linux kernel before 3.1.1 mishandles a...

The tty_open function in drivers/tty/tty_io.c in the Linux kernel before 3.1.1 mishandles a driver-lookup failure, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via crafted access to a device file under the /dev/pts directory.

Record
GHSA-w32m-rx9f-gjv3
CVSS 3.0
5.5 MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV 5.5

The tty_open function in drivers/tty/tty_io.c in the Linux kernel before 3.1.1 mishandles a driver-lookup failure, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via crafted access to a device file under the /dev/pts directory.

Record
CVE-2011-5321
CVSS 3.0
5.5 MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2011-5321 5.5

The tty_open function in drivers/tty/tty_io.c in the Linux kernel before 3.1.1 mishandles a driver-lookup failure, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via crafted access to a device file under the /dev/pts directory.

Record
DEBIAN-CVE-2011-5321
CVSS 3.0
5.5 MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2011-5321 5.5

The tty_open function in drivers/tty/tty_io.c in the Linux kernel before 3.1.1 mishandles a driver-lookup failure, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via crafted access to a device file under the /dev/pts directory.

Record
UBUNTU-CVE-2011-5321
CVSS 3.0
5.5 MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
linux
Debian:12
 before 3.2.20-1
3.2.20-1
linux
Debian:13
 before 3.2.20-1
3.2.20-1
linux
Debian:14
 before 3.2.20-1
3.2.20-1
linux-2.6
Debian:6.0
 before 2.6.32-48squeeze12, plus listed versions
2.6.32-302.6.32-30+m68k.52.6.32-312.6.32-31~bpo50+12.6.32-32
Show 33 moreShow less
2.6.32-332.6.32-342.6.32-34squeeze12.6.32-352.6.32-35squeeze12.6.32-35squeeze22.6.32-35~bpo50+12.6.32-362.6.32-372.6.32-382.6.32-392.6.32-39squeeze12.6.32-402.6.32-412.6.32-41squeeze22.6.32-422.6.32-432.6.32-442.6.32-452.6.32-462.6.32-46squeeze12.6.32-472.6.32-482.6.32-48squeeze12.6.32-48squeeze102.6.32-48squeeze112.6.32-48squeeze32.6.32-48squeeze42.6.32-48squeeze52.6.32-48squeeze62.6.32-48squeeze72.6.32-48squeeze82.6.32-48squeeze9
2.6.32-48squeeze12
kernel
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-abi-whitelists
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debug
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debug-debuginfo
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debug-devel
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debuginfo
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
Show 63 moreShow less
Affected packages
PackageAffectedFixed
kernel-debuginfo-common-i686
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debuginfo-common-x86_64
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-devel
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-doc
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-firmware
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-headers
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
perf
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
perf-debuginfo
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
python-perf-debuginfo
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
python-perf
Red Hat:enterprise_linux:6::client
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-abi-whitelists
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debug
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debug-debuginfo
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debug-devel
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debuginfo
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debuginfo-common-x86_64
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-devel
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-doc
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-firmware
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-headers
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
perf
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
perf-debuginfo
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
python-perf-debuginfo
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
python-perf
Red Hat:enterprise_linux:6::computenode
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-abi-whitelists
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-bootwrapper
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debug
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debug-debuginfo
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debug-devel
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debuginfo
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debuginfo-common-i686
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debuginfo-common-ppc64
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debuginfo-common-s390x
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debuginfo-common-x86_64
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-devel
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-doc
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-firmware
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-headers
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-kdump
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-kdump-debuginfo
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-kdump-devel
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
perf
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
perf-debuginfo
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
python-perf-debuginfo
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
python-perf
Red Hat:enterprise_linux:6::server
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-abi-whitelists
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debug
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debug-debuginfo
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debug-devel
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debuginfo
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debuginfo-common-i686
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-debuginfo-common-x86_64
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-devel
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-doc
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-firmware
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
kernel-headers
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
perf
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
perf-debuginfo
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
python-perf-debuginfo
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6
python-perf
Red Hat:enterprise_linux:6::workstation
 before 0:2.6.32-504.30.3.el6
0:2.6.32-504.30.3.el6

History

History
RecordedChangedSources
affected
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2011-5321 is a medium vulnerability (CVSS 5.5) in Linux Kernel, published June 14, 2015. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.37%, the 31st percentile. Fixed in linux 3.2.20-1.

References

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