potential uninitialized variable in kernel-security-keys CVE-2016-4470 critical

Tracked by Jolla

asked 2017-05-19 11:58:58 +0300

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updated 2017-05-19 11:58:58 +0300

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Description

The key_reject_and_link function in security/keys/key.c in the Linux kernel through 4.6.3 does not ensure that a certain data structure is initialized, which allows local users to cause a denial of service (system crash) via vectors involving a crafted keyctl request2 command. CVSSv3: 5.5 medium (attack range: local)

Upstream Patch is available.

File affected: kernel-adaptation-sbj-3.4.108.20161101.1/security/keys/key.c lines 573-579

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