take reference on channels netns in kernel-ppp CVE-2016-4805 critical

Tracked by Jolla (In progress)

asked 2017-05-11 15:03:43 +0300

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updated 2017-05-11 15:03:43 +0300

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Description
Use-after-free vulnerability in drivers/net/ppp/ppp_generic.c in the Linux kernel before 4.5.2 allows local users to cause a denial of service (memory corruption and system crash, or spinlock) or possibly have unspecified other impact by removing a network namespace, related to the ppp_register_net_channel and ppp_unregister_channel functions. CVSSv3:7.8 high (attack range: local)

Upstream Patch is available.

file affected: kernel-adaptation-sbj-3.4.108.20161101.1/drivers/net/ppp/ppp_generic.c lines 2177-2183; 2274-2279

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