Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Security Advisory secalert@redhat.com Red Hat Security Response Team RHSA-2012:1282 Final 1 1 2012-09-19T17:20:00Z Current version 2012-09-19T17:20:00Z 2012-09-19T17:20:00Z Red Hat rhsa-to-cvrf 1.0.1484 2012-09-19T18:05:01Z Updated kernel-rt packages that fix one security issue, several bugs, and add enhancements are now available for Red Hat Enterprise MRG 2.2. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issue: * It was found that a deadlock could occur in the Out of Memory (OOM) killer. A process could trigger this deadlock by consuming a large amount of memory, and then causing request_module() to be called. A local, unprivileged user could use this flaw to cause a denial of service (excessive memory consumption). (CVE-2012-4398, Moderate) Red Hat would like to thank Tetsuo Handa for reporting this issue. The kernel-rt packages have been upgraded to upstream version 3.2, which provides a number of bug fixes and enhancements over the previous version. (BZ#798421) This update also fixes various bugs and adds enhancements. Documentation for these changes will be available shortly from the Technical Notes document linked to in the References section. Users should upgrade to these updated kernel-rt packages, which correct this issue, fix these bugs, and add these enhancements. The system must be rebooted for this update to take effect. Please see https://www.redhat.com/footer/terms-of-use.html Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate https://rhn.redhat.com/errata/RHSA-2012-1282.html https://rhn.redhat.com/errata/RHSA-2012-1282.html https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_MRG/2/html/Technical_Notes/sec-Red_Hat_Enterprise_Linux_6.html#RHSA-2012-1282 https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_MRG/2/html/Technical_Notes/sec-Red_Hat_Enterprise_Linux_6.html#RHSA-2012-1282 https://bugzilla.redhat.com/show_bug.cgi?id=725799 https://bugzilla.redhat.com/show_bug.cgi?id=725799 https://bugzilla.redhat.com/show_bug.cgi?id=786083 https://bugzilla.redhat.com/show_bug.cgi?id=786083 https://bugzilla.redhat.com/show_bug.cgi?id=798421 https://bugzilla.redhat.com/show_bug.cgi?id=798421 https://bugzilla.redhat.com/show_bug.cgi?id=798423 https://bugzilla.redhat.com/show_bug.cgi?id=798423 https://bugzilla.redhat.com/show_bug.cgi?id=799385 https://bugzilla.redhat.com/show_bug.cgi?id=799385 https://bugzilla.redhat.com/show_bug.cgi?id=799386 https://bugzilla.redhat.com/show_bug.cgi?id=799386 https://bugzilla.redhat.com/show_bug.cgi?id=799389 https://bugzilla.redhat.com/show_bug.cgi?id=799389 https://bugzilla.redhat.com/show_bug.cgi?id=799391 https://bugzilla.redhat.com/show_bug.cgi?id=799391 https://bugzilla.redhat.com/show_bug.cgi?id=799399 https://bugzilla.redhat.com/show_bug.cgi?id=799399 https://bugzilla.redhat.com/show_bug.cgi?id=814689 https://bugzilla.redhat.com/show_bug.cgi?id=814689 https://bugzilla.redhat.com/show_bug.cgi?id=815937 https://bugzilla.redhat.com/show_bug.cgi?id=815937 https://bugzilla.redhat.com/show_bug.cgi?id=825344 https://bugzilla.redhat.com/show_bug.cgi?id=825344 https://bugzilla.redhat.com/show_bug.cgi?id=834583 https://bugzilla.redhat.com/show_bug.cgi?id=834583 https://bugzilla.redhat.com/show_bug.cgi?id=842680 https://bugzilla.redhat.com/show_bug.cgi?id=842680 MRG Realtime for RHEL 6 Server v.2 kernel-rt-3.2.23-rt37.56.el6rt.src.rpm rt-firmware-1.0-3.el6_3.src.rpm kernel-rt-3.2.23-rt37.56.el6rt as a component of MRG Realtime for RHEL 6 Server v.2 rt-firmware-1.0-3.el6_3 as a component of MRG Realtime for RHEL 6 Server v.2 It was found that a deadlock could occur in the Out of Memory (OOM) killer. A process could trigger this deadlock by consuming a large amount of memory, and then causing request_module() to be called. A local, unprivileged user could use this flaw to cause a denial of service (excessive memory consumption). 2012-05-07T00:00:00Z 2012-03-23T00:00:00Z CVE-2012-4398 6Server-MRG-Realtime-2:kernel-rt-3.2.23-rt37.56.el6rt 6Server-MRG-Realtime-2:rt-firmware-1.0-3.el6_3 Moderate 4.7 AV:L/AC:M/Au:N/C:N/I:N/A:C Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258 To install kernel packages manually, use "rpm -ivh [package]". Do not use "rpm -Uvh" as that will remove the running kernel binaries from your system. You may use "rpm -e" to remove old kernels after determining that the new kernel functions properly on your system. https://rhn.redhat.com/errata/RHSA-2012-1282.html https://www.redhat.com/security/data/cve/CVE-2012-4398.html CVE-2012-4398 https://bugzilla.redhat.com/show_bug.cgi?id=853474 bz#853474: CVE-2012-4398 kernel: request_module() OOM local DoS Red Hat would like to thank Tetsuo Handa for reporting this issue.