Skip to content
Fencer Vulns
medium 6.2

CVE-2016-2543 json

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…

published 2016-04-27 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-3619

cvss
6.2
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits
0
none known

Summary

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.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.4.2-1

debian advisories DEBIAN-CVE-2016-2543

  • linux Ubuntu 14.04 LTS 3.13.0-83.127
  • linux-lts-wily Ubuntu 14.04 LTS 4.2.0-30.35~14.04.1
  • linux-lts-vivid Ubuntu 14.04 LTS 3.19.0-56.62~14.04.1
  • linux-lts-utopic Ubuntu 14.04 LTS 3.16.0-67.87~14.04.1

ubuntu advisories UBUNTU-CVE-2016-2543

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-ec2 SLES 11 SP3-LTSS, OpenStack Cloud 5, Manager Proxy 2.1 +1 more 3.0.101-0.47.79.1
  • kernel-xen SLES 11 SP3-LTSS, OpenStack Cloud 5, Manager Proxy 2.1 +1 more 3.0.101-0.47.79.1
  • kernel-syms SLES 11 SP3-LTSS, OpenStack Cloud 5, Manager Proxy 2.1 +1 more 3.0.101-0.47.79.1
  • kernel-trace SLES 11 SP3-LTSS, OpenStack Cloud 5, Manager Proxy 2.1 +1 more 3.0.101-0.47.79.1
  • kernel-bigsmp SLES 11 SP3-LTSS, OpenStack Cloud 5, Manager Proxy 2.1 +1 more 3.0.101-0.47.79.1
  • kernel-source SLES 11 SP3-LTSS, OpenStack Cloud 5, Manager Proxy 2.1 +1 more 3.0.101-0.47.79.1
  • kernel-default SLES 11 SP3-LTSS, OpenStack Cloud 5, Manager Proxy 2.1 +1 more 3.0.101-0.47.79.1
  • kernel-rt SLE Real Time 11 SP4 3.0.101.rt130-51.1

suse advisories SUSE-SU-2016:2074-1SUSE-SU-2016:1203-1SUSE-SU-2016:1102-1SUSE-SU-2016:0911-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-2543 updated cvss 4.7

kernel: sound: GPF in snd_seq_fifo_clear

  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 6.2 CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.