CVE-2015-7891

Public Exploit

Description

Race condition in the ioctl implementation in the Samsung Graphics 2D driver (aka /dev/fimg2d) in Samsung devices with Android L(5.0/5.1) allows local users to trigger memory errors by leveraging definition of g2d_lock and g2d_unlock lock macros as no-ops, aka SVE-2015-4598.

References

Link	Tags
http://www.securityfocus.com/bid/77335	vdb entry third party advisory
https://bugs.chromium.org/p/project-zero/issues/detail?id=492	issue tracking third party advisory
https://www.exploit-db.com/exploits/38557/	exploit vdb entry third party advisory
http://packetstormsecurity.com/files/134107/Samsung-Fimg2d-FIMG2D_BITBLT_BLIT-Ioctl-Concurrency-Flaw.html	exploit vdb entry third party advisory
http://security.samsungmobile.com/smrupdate.html#SMR-OCT-2015	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2015-7891?: CVE-2015-7891 has been scored as a high severity vulnerability.
How to fix CVE-2015-7891?: To fix CVE-2015-7891, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-7891 being actively exploited in the wild?: It is possible that CVE-2015-7891 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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Description

Category

CWE-362 – Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

References

Frequently Asked Questions