What is CVE-2011-5321?

CVE-2011-5321 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2011-5321 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2011-5321?

CVE-2011-5321 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2011-5321?

No patch is currently available for CVE-2011-5321. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2011-5321 actively exploited?

CVE-2011-5321 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2011-5321

Medium

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.

Package Linux Kernel

Published 2016-05-02

Last modified 2026-05-06

CVSS version 3.0

Patch available

Awaiting data

CVSS 3.0 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

The following references provide additional information about CVE-2011-5321 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
http://rhn.redhat.com/errata/RHSA-2015-1221.html
Kernel.org
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1.1
Openwall
http://www.openwall.com/lists/oss-security/2015/03/13/17
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=1201887
Kernel patch commit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c290f8358acaeffd8e0c551ddcc24d1206143376
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/c290f8358acaeffd8e0c551ddcc24d1206143376
Patch

Details

CVE ID CVE-2011-5321

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.0

Published 2016-05-02

Modified 2026-05-06

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2011-5321?

CVE-2011-5321 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2011-5321 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2011-5321?

CVE-2011-5321 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.0). The vector string is CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2011-5321?

No patch is currently available for CVE-2011-5321. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2011-5321 actively exploited?

No — CVE-2011-5321 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.