漏洞类别：RedHat
漏洞等级： 
漏洞信息
The kernel packages contain the Linux kernel, the core of any Linux operating system.
A race condition flaw was found in the N_HLDC Linux kernel driver when accessing n_hdlc.tbuf list that can lead to double free. A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system. (CVE-2017-2636, Important)
Affected Products
Red Hat Enterprise Linux Server - Extended Update Support 6.7 x86_64
Red Hat Enterprise Linux Server - Extended Update Support 6.7 i386
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 6.7 s390x
Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.7 ppc64
Red Hat Enterprise Linux EUS Compute Node 6.7 x86_64
漏洞危害
A local, unprivileged user able to set the HDLC line discipline on the tty device could use this flaw to increase their privileges on the system.
解决方案
Upgrade to the latest packages which contain a patch. Refer to Applying Package Updates to RHEL system for details.
Refer to Red Hat security advisory RHSA-2017:1233 to address this issue and obtain more information.
Patch:
Following are links for downloading patches to fix the vulnerabilities:
0day
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