CVE-2011-5321
Kernel: tty: driver reference leakage in tty_open
Severity
ModerateRed Hat Product Security
CVSS 2.0
Review impact separately from score.
Published · October 12, 2011
Updated · November 21, 2025
Description
A NULL pointer dereference flaw was found in the way the Linux kernel's virtual console implementation handled reference counting when accessing pseudo-terminal device files (/dev/pts/*). A local, unprivileged attacker could use this flaw to crash the system.
Statement
This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5, 7 and Red Hat Enterprise MRG 2.
This issue affects the version of Linux kernel as shipped with Red Hat Enterprise Linux 6. Future kernel updates for Red Hat Enterprise Linux 6 may address this issue.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 2.0 · 4.7AV:L/AC:M/Au:N/C:N/I:N/A:C
CWE not specified