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redhatRedHatRHSA-2012:1589
HistoryDec 18, 2012 - 12:00 a.m.

(RHSA-2012:1589) Low: kernel security and bug fix update

2012-12-1800:00:00
access.redhat.com
16

1.2 Low

CVSS2

Access Vector

LOCAL

Access Complexity

HIGH

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:L/AC:H/Au:N/C:N/I:N/A:P

0.0005 Low

EPSS

Percentile

13.3%

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

This update fixes the following security issue:

  • A flaw was found in the way the Linux kernel’s dl2k driver, used by
    certain D-Link Gigabit Ethernet adapters, restricted IOCTLs. A local,
    unprivileged user could use this flaw to issue potentially harmful IOCTLs,
    which could cause Ethernet adapters using the dl2k driver to malfunction
    (for example, losing network connectivity). (CVE-2012-2313, Low)

Red Hat would like to thank Stephan Mueller for reporting this issue.

This update also fixes the following bug:

  • The kernel allows high priority real time tasks, such as tasks scheduled
    with the SCHED_FIFO policy, to be throttled. Previously, the CPU stop tasks
    were scheduled as high priority real time tasks and could be thus throttled
    accordingly. However, the replenishment timer, which is responsible for
    clearing a throttle flag on tasks, could be pending on the just disabled
    CPU. This could lead to the situation that the throttled tasks were never
    scheduled to run. Consequently, if any of such tasks was needed to complete
    the CPU disabling, the system became unresponsive. This update introduces a
    new scheduler class, which gives a task the highest possible system
    priority and such a task cannot be throttled. The stop-task scheduling
    class is now used for the CPU stop tasks, and the system shutdown completes
    as expected in the scenario described. (BZ#876077)

Users should upgrade to these updated packages, which contain backported
patches to correct these issues. The system must be rebooted for this
update to take effect.

1.2 Low

CVSS2

Access Vector

LOCAL

Access Complexity

HIGH

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:L/AC:H/Au:N/C:N/I:N/A:P

0.0005 Low

EPSS

Percentile

13.3%

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