CVE-2014-4654

Severity: medium (CVSS 4.6 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2014-07-03 · updated 2026-06-17
Weakness: CWE-416

Description

The snd_ctl_elem_add function in sound/core/control.c in the ALSA control implementation in the Linux kernel before 3.15.2 does not check authorization for SNDRV_CTL_IOCTL_ELEM_REPLACE commands, which allows local users to remove kernel controls and cause a denial of service (use-after-free and system crash) by leveraging /dev/snd/controlCX access for an ioctl call.

Affected products

Canonical Ubuntu Linux: 12.04
Linux kernel: before 3.15.2 — fixed in 3.15.2
SUSE Linux Enterprise Server: 10-sp4

How to fix

Upgrade to a fixed version: Linux kernel 3.15.2. Check the vendor advisory for mitigations.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=82262a46627bebb0febcc26664746c25cef08563
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00020.html
http://rhn.redhat.com/errata/RHSA-2014-1083.html
http://secunia.com/advisories/59434
http://secunia.com/advisories/59777
http://secunia.com/advisories/60545
http://secunia.com/advisories/60564
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.15.2
http://www.openwall.com/lists/oss-security/2014/06/26/6
http://www.securityfocus.com/bid/68162
http://www.ubuntu.com/usn/USN-2334-1
http://www.ubuntu.com/usn/USN-2335-1

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