CVE-2016-2543

medium

Published 2016-04-27 · Modified 2026-05-06

CVSS v3

6.2

CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2

4.9

VIR risk

6.2

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.

Predictions

Exploit likelihood

62%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2016-2543

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — https://github.com/torvalds/linux/commit/030e2c78d3a91dd0d27fef37e91950dde333eba1

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.1

vendor Authored 2026-05-27

Vendor advisory: cve@mitre.org — http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=030e2c78d3a91dd0d27fef37e91950dde333eba1

OS impact

OS	Version	Status	Fixed in
debian	bookworm	fixed	`4.4.2-1`
debian	bullseye	fixed	`4.4.2-1`
debian	forky	fixed	`4.4.2-1`
debian	sid	fixed	`4.4.2-1`
debian	trixie	fixed	`4.4.2-1`
linux-kernel		affected

References

Verify integrity in audit chain (admin only). AS-IS.