CVE-2016-2543

Description

The snd_seq_ioctl_remove_events function in sound/core/seq/seq_clientmgr.c in the Linux kernel before 4.4.1 does not verify FIFO assignment before proceeding with FIFO clearing, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via a crafted ioctl call.

6.2

CVSS

Severity: Medium

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.05%

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Affected: n/a n/a

References

Link	Tags
http://www.ubuntu.com/usn/USN-2930-1	vendor advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=030e2c78d3a91dd0d27fef37e91950dde333eba1	vendor advisory
http://www.ubuntu.com/usn/USN-2967-1	vendor advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.1	vendor advisory
http://www.ubuntu.com/usn/USN-2930-2	vendor advisory
https://github.com/torvalds/linux/commit/030e2c78d3a91dd0d27fef37e91950dde333eba1	patch vendor advisory
http://www.debian.org/security/2016/dsa-3503	vendor advisory
http://www.ubuntu.com/usn/USN-2967-2	vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1311554
http://www.openwall.com/lists/oss-security/2016/01/19/1	mailing list
http://www.ubuntu.com/usn/USN-2930-3	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html	vendor advisory
http://www.securityfocus.com/bid/83377	vdb entry
http://www.ubuntu.com/usn/USN-2929-1	vendor advisory
http://www.ubuntu.com/usn/USN-2932-1	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html	vendor advisory
http://www.ubuntu.com/usn/USN-2931-1	vendor advisory
http://www.securitytracker.com/id/1035304	vdb entry
http://www.ubuntu.com/usn/USN-2929-2	vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-2543?: CVE-2016-2543 has been scored as a medium severity vulnerability.
How to fix CVE-2016-2543?: To fix CVE-2016-2543, 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-2016-2543 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2016-2543 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.