CVE-2016-2549

Bug #1549200 reported by Steve Beattie on 2016-02-24
256
This bug affects 1 person
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-armadaxp (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-flo (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-goldfish (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-lts-quantal (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-lts-raring (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-lts-saucy (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-lts-trusty (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-lts-utopic (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-lts-vivid (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-lts-wily (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-lts-xenial (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-mako (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-manta (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-raspi2 (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-snapdragon (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned
linux-ti-omap4 (Ubuntu)
Medium
Unassigned
Precise
Medium
Unassigned
Trusty
Medium
Unassigned
Vivid
Undecided
Unassigned
Wily
Medium
Unassigned
Xenial
Medium
Unassigned
Yakkety
Medium
Unassigned

Bug Description

sound/core/hrtimer.c in the Linux kernel before 4.4.1 does not prevent recursive callback access, which allows local users to cause a denial of service (deadlock) via a crafted ioctl call. However, the previous fix is still insufficient: it may still cause a lockup when the ALSA timer instance reprograms itself in its callback. Then it invokes the start function even in snd_timer_interrupt() that is called in hrtimer callback itself, results in a CPU stall. This is no hypothetical problem but actually triggered by syzkaller fuzzer.

Break-Fix: - 2ba1fe7a06d3624f9a7586d672b55f08f7c670f3

CVE References

Steve Beattie (sbeattie) wrote :

CVE-2016-2549

tags: added: kernel-cve-tracking-bug
information type: Public → Public Security
Changed in linux-lts-trusty (Ubuntu Wily):
status: New → Invalid
Changed in linux-lts-trusty (Ubuntu Xenial):
status: New → Invalid
Changed in linux-lts-trusty (Ubuntu Trusty):
status: New → Invalid
Changed in linux-lts-wily (Ubuntu Precise):
status: New → Invalid
Changed in linux-lts-wily (Ubuntu Wily):
status: New → Invalid
Changed in linux-lts-wily (Ubuntu Xenial):
status: New → Invalid
Changed in linux-lts-quantal (Ubuntu Wily):
status: New → Invalid
Changed in linux-lts-quantal (Ubuntu Xenial):
status: New → Invalid
Changed in linux-lts-quantal (Ubuntu Trusty):
status: New → Invalid
Changed in linux-ti-omap4 (Ubuntu Wily):
status: New → Invalid
Changed in linux-ti-omap4 (Ubuntu Xenial):
status: New → Invalid
Changed in linux-ti-omap4 (Ubuntu Trusty):
status: New → Invalid
Changed in linux-lts-raring (Ubuntu Wily):
status: New → Invalid
Changed in linux-lts-raring (Ubuntu Xenial):
status: New → Invalid
Changed in linux-lts-raring (Ubuntu Trusty):
status: New → Invalid
Changed in linux-armadaxp (Ubuntu Wily):
status: New → Invalid
Changed in linux-armadaxp (Ubuntu Xenial):
status: New → Invalid
Changed in linux-armadaxp (Ubuntu Trusty):
status: New → Invalid
Changed in linux-lts-xenial (Ubuntu Precise):
status: New → Invalid
Changed in linux-lts-xenial (Ubuntu Wily):
status: New → Invalid
Changed in linux-lts-xenial (Ubuntu Xenial):
status: New → Invalid
Changed in linux-lts-saucy (Ubuntu Wily):
status: New → Invalid
Changed in linux-lts-saucy (Ubuntu Xenial):
status: New → Invalid
Changed in linux-lts-saucy (Ubuntu Trusty):
status: New → Invalid
Changed in linux-manta (Ubuntu Precise):
status: New → Invalid
Changed in linux-lts-vivid (Ubuntu Precise):
status: New → Invalid
Changed in linux-lts-vivid (Ubuntu Wily):
status: New → Invalid
Changed in linux-lts-vivid (Ubuntu Xenial):
status: New → Invalid
Changed in linux-raspi2 (Ubuntu Precise):
status: New → Invalid
Changed in linux-raspi2 (Ubuntu Trusty):
status: New → Invalid
Changed in linux-mako (Ubuntu Precise):
status: New → Invalid
Changed in linux-lts-utopic (Ubuntu Precise):
status: New → Invalid
Changed in linux-lts-utopic (Ubuntu Wily):
status: New → Invalid
Changed in linux-lts-utopic (Ubuntu Xenial):
status: New → Invalid
Changed in linux-goldfish (Ubuntu Precise):
status: New → Invalid
Changed in linux-flo (Ubuntu Precise):
status: New → Invalid
description: updated
Changed in linux-lts-trusty (Ubuntu Precise):
importance: Undecided → Medium
Changed in linux-lts-trusty (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-lts-trusty (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-lts-trusty (Ubuntu Trusty):
importance: Undecided → Medium
Changed in linux-lts-wily (Ubuntu Precise):
importance: Undecided → Medium
Changed in linux-lts-wily (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-lts-wily (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-lts-wily (Ubuntu Trusty):
importance: Undecided → Medium
Changed in linux-lts-quantal (Ubuntu Precise):
status: New → Invalid
importance: Undecided → Medium
Changed in linux-lts-quantal (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-lts-quantal (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-lts-quantal (Ubuntu Trusty):
importance: Undecided → Medium
Changed in linux (Ubuntu Precise):
importance: Undecided → Medium
Changed in linux (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux (Ubuntu Trusty):
importance: Undecided → Medium
Changed in linux-ti-omap4 (Ubuntu Precise):
importance: Undecided → Medium
Changed in linux-ti-omap4 (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-ti-omap4 (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-ti-omap4 (Ubuntu Trusty):
importance: Undecided → Medium
Changed in linux-lts-raring (Ubuntu Precise):
status: New → Invalid
importance: Undecided → Medium
Changed in linux-lts-raring (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-lts-raring (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-lts-raring (Ubuntu Trusty):
importance: Undecided → Medium
Changed in linux-armadaxp (Ubuntu Precise):
importance: Undecided → Medium
Changed in linux-armadaxp (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-armadaxp (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-armadaxp (Ubuntu Trusty):
importance: Undecided → Medium
Changed in linux-lts-xenial (Ubuntu Precise):
importance: Undecided → Medium
Changed in linux-lts-xenial (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-lts-xenial (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-lts-xenial (Ubuntu Trusty):
importance: Undecided → Medium
Changed in linux-lts-saucy (Ubuntu Precise):
status: New → Invalid
importance: Undecided → Medium
Changed in linux-lts-saucy (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-lts-saucy (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-lts-saucy (Ubuntu Trusty):
importance: Undecided → Medium
Changed in linux-manta (Ubuntu Precise):
importance: Undecided → Medium
Changed in linux-manta (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-manta (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-manta (Ubuntu Trusty):
status: New → Invalid
importance: Undecided → Medium
Changed in linux-lts-vivid (Ubuntu Precise):
importance: Undecided → Medium
Changed in linux-lts-vivid (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-lts-vivid (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-lts-vivid (Ubuntu Trusty):
importance: Undecided → Medium
Changed in linux-raspi2 (Ubuntu Precise):
importance: Undecided → Medium
Changed in linux-raspi2 (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-raspi2 (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-raspi2 (Ubuntu Trusty):
importance: Undecided → Medium
Steve Beattie (sbeattie) on 2016-02-24
Changed in linux-mako (Ubuntu Precise):
importance: Undecided → Medium
Changed in linux-mako (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-mako (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-mako (Ubuntu Trusty):
status: New → Invalid
importance: Undecided → Medium
Changed in linux-lts-utopic (Ubuntu Precise):
importance: Undecided → Medium
Changed in linux-lts-utopic (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-lts-utopic (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-lts-utopic (Ubuntu Trusty):
importance: Undecided → Medium
Changed in linux-goldfish (Ubuntu Precise):
importance: Undecided → Medium
Changed in linux-goldfish (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-goldfish (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-goldfish (Ubuntu Trusty):
status: New → Invalid
importance: Undecided → Medium
Changed in linux-flo (Ubuntu Precise):
importance: Undecided → Medium
Changed in linux-flo (Ubuntu Wily):
importance: Undecided → Medium
Changed in linux-flo (Ubuntu Xenial):
importance: Undecided → Medium
Changed in linux-flo (Ubuntu Trusty):
status: New → Invalid
importance: Undecided → Medium
Steve Beattie (sbeattie) on 2016-03-03
Changed in linux-lts-trusty (Ubuntu Precise):
status: New → Fix Committed
Changed in linux-lts-wily (Ubuntu Trusty):
status: New → Fix Committed
Changed in linux (Ubuntu Wily):
status: New → Fix Committed
Changed in linux (Ubuntu Xenial):
status: New → Invalid
Changed in linux (Ubuntu Trusty):
status: New → Fix Committed
Changed in linux-lts-xenial (Ubuntu Trusty):
status: New → Fix Committed
Changed in linux-lts-vivid (Ubuntu Trusty):
status: New → Fix Committed
Changed in linux-raspi2 (Ubuntu Wily):
status: New → Fix Committed
Changed in linux-raspi2 (Ubuntu Xenial):
status: New → Fix Committed
Changed in linux-lts-utopic (Ubuntu Trusty):
status: New → Fix Committed
Steve Beattie (sbeattie) on 2016-03-15
Changed in linux-lts-trusty (Ubuntu Precise):
status: Fix Committed → Fix Released
Changed in linux (Ubuntu Trusty):
status: Fix Committed → Fix Released
Changed in linux-lts-vivid (Ubuntu Trusty):
status: Fix Committed → Fix Released
Changed in linux-lts-utopic (Ubuntu Trusty):
status: Fix Committed → Fix Released
Steve Beattie (sbeattie) on 2016-03-18
Changed in linux-lts-wily (Ubuntu Trusty):
status: Fix Committed → Fix Released
Changed in linux (Ubuntu Wily):
status: Fix Committed → Fix Released
Changed in linux-raspi2 (Ubuntu Wily):
status: Fix Committed → Fix Released
Steve Beattie (sbeattie) on 2016-04-05
Changed in linux (Ubuntu Precise):
status: New → Fix Committed
Steve Beattie (sbeattie) on 2016-04-19
Changed in linux-manta (Ubuntu Xenial):
status: New → Invalid
Steve Beattie (sbeattie) on 2016-04-27
Changed in linux-ti-omap4 (Ubuntu Precise):
status: New → Fix Committed
Steve Beattie (sbeattie) on 2016-05-06
Changed in linux-snapdragon (Ubuntu Precise):
status: New → Invalid
importance: Undecided → Medium
Changed in linux-snapdragon (Ubuntu Wily):
status: New → Invalid
importance: Undecided → Medium
Changed in linux-snapdragon (Ubuntu Xenial):
status: New → Invalid
importance: Undecided → Medium
Changed in linux-snapdragon (Ubuntu Yakkety):
status: New → Invalid
importance: Undecided → Medium
Changed in linux-snapdragon (Ubuntu Trusty):
status: New → Invalid
importance: Undecided → Medium
description: updated
Steve Beattie (sbeattie) on 2016-05-10
Changed in linux (Ubuntu Precise):
status: Fix Committed → Fix Released
Changed in linux-ti-omap4 (Ubuntu Precise):
status: Fix Committed → Fix Released
Steve Beattie (sbeattie) on 2016-05-13
Changed in linux-armadaxp (Ubuntu Precise):
status: New → Fix Released

This bug was nominated against a series that is no longer supported, ie vivid. The bug task representing the vivid nomination is being closed as Won't Fix.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu Vivid):
status: New → Won't Fix
Andy Whitcroft (apw) on 2017-10-17
Changed in linux-armadaxp (Ubuntu Vivid):
status: New → Won't Fix
Andy Whitcroft (apw) on 2017-10-17
Changed in linux-flo (Ubuntu Vivid):
status: New → Won't Fix
Andy Whitcroft (apw) on 2017-10-17
Changed in linux-goldfish (Ubuntu Vivid):
status: New → Won't Fix
Andy Whitcroft (apw) on 2017-10-17
Changed in linux-lts-quantal (Ubuntu Vivid):
status: New → Won't Fix
Andy Whitcroft (apw) on 2017-10-17
Changed in linux-lts-trusty (Ubuntu Vivid):
status: New → Won't Fix
Andy Whitcroft (apw) on 2017-10-17
Changed in linux-lts-utopic (Ubuntu Vivid):
status: New → Won't Fix
Andy Whitcroft (apw) on 2017-10-17
Changed in linux-lts-vivid (Ubuntu Vivid):
status: New → Won't Fix
Andy Whitcroft (apw) on 2017-10-17
Changed in linux-mako (Ubuntu Vivid):
status: New → Won't Fix
Andy Whitcroft (apw) on 2017-10-17
Changed in linux-raspi2 (Ubuntu Vivid):
status: New → Won't Fix
Andy Whitcroft (apw) on 2017-10-17
Changed in linux-ti-omap4 (Ubuntu Vivid):
status: New → Won't Fix
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