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[Bug 1549200] Re: CVE-2016-2549

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Steve Beattie <sbeattie@xxxxxxxxxx>
Date: Tue, 10 May 2016 22:06:55 -0000
Reply-to: Bug 1549200 <1549200@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Changed in: linux (Ubuntu Precise)
       Status: Fix Committed => Fix Released

** Changed in: linux-ti-omap4 (Ubuntu Precise)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1549200

Title:
  CVE-2016-2549

Status in linux package in Ubuntu:
  Invalid
Status in linux-armadaxp package in Ubuntu:
  Invalid
Status in linux-flo package in Ubuntu:
  New
Status in linux-goldfish package in Ubuntu:
  New
Status in linux-lts-quantal package in Ubuntu:
  Invalid
Status in linux-lts-raring package in Ubuntu:
  Invalid
Status in linux-lts-saucy package in Ubuntu:
  Invalid
Status in linux-lts-trusty package in Ubuntu:
  Invalid
Status in linux-lts-utopic package in Ubuntu:
  Invalid
Status in linux-lts-vivid package in Ubuntu:
  Invalid
Status in linux-lts-wily package in Ubuntu:
  Invalid
Status in linux-lts-xenial package in Ubuntu:
  Invalid
Status in linux-mako package in Ubuntu:
  New
Status in linux-manta package in Ubuntu:
  Invalid
Status in linux-raspi2 package in Ubuntu:
  Fix Committed
Status in linux-snapdragon package in Ubuntu:
  Invalid
Status in linux-ti-omap4 package in Ubuntu:
  Invalid
Status in linux source package in Precise:
  Fix Released
Status in linux-armadaxp source package in Precise:
  New
Status in linux-flo source package in Precise:
  Invalid
Status in linux-goldfish source package in Precise:
  Invalid
Status in linux-lts-quantal source package in Precise:
  Invalid
Status in linux-lts-raring source package in Precise:
  Invalid
Status in linux-lts-saucy source package in Precise:
  Invalid
Status in linux-lts-trusty source package in Precise:
  Fix Released
Status in linux-lts-utopic source package in Precise:
  Invalid
Status in linux-lts-vivid source package in Precise:
  Invalid
Status in linux-lts-wily source package in Precise:
  Invalid
Status in linux-lts-xenial source package in Precise:
  Invalid
Status in linux-mako source package in Precise:
  Invalid
Status in linux-manta source package in Precise:
  Invalid
Status in linux-raspi2 source package in Precise:
  Invalid
Status in linux-snapdragon source package in Precise:
  Invalid
Status in linux-ti-omap4 source package in Precise:
  Fix Released
Status in linux source package in Trusty:
  Fix Released
Status in linux-armadaxp source package in Trusty:
  Invalid
Status in linux-flo source package in Trusty:
  Invalid
Status in linux-goldfish source package in Trusty:
  Invalid
Status in linux-lts-quantal source package in Trusty:
  Invalid
Status in linux-lts-raring source package in Trusty:
  Invalid
Status in linux-lts-saucy source package in Trusty:
  Invalid
Status in linux-lts-trusty source package in Trusty:
  Invalid
Status in linux-lts-utopic source package in Trusty:
  Fix Released
Status in linux-lts-vivid source package in Trusty:
  Fix Released
Status in linux-lts-wily source package in Trusty:
  Fix Released
Status in linux-lts-xenial source package in Trusty:
  Fix Committed
Status in linux-mako source package in Trusty:
  Invalid
Status in linux-manta source package in Trusty:
  Invalid
Status in linux-raspi2 source package in Trusty:
  Invalid
Status in linux-snapdragon source package in Trusty:
  Invalid
Status in linux-ti-omap4 source package in Trusty:
  Invalid
Status in linux source package in Vivid:
  New
Status in linux-armadaxp source package in Vivid:
  New
Status in linux-flo source package in Vivid:
  New
Status in linux-goldfish source package in Vivid:
  New
Status in linux-lts-quantal source package in Vivid:
  New
Status in linux-lts-raring source package in Vivid:
  New
Status in linux-lts-saucy source package in Vivid:
  New
Status in linux-lts-trusty source package in Vivid:
  New
Status in linux-lts-utopic source package in Vivid:
  New
Status in linux-lts-vivid source package in Vivid:
  New
Status in linux-lts-wily source package in Vivid:
  New
Status in linux-lts-xenial source package in Vivid:
  New
Status in linux-mako source package in Vivid:
  New
Status in linux-manta source package in Vivid:
  New
Status in linux-raspi2 source package in Vivid:
  New
Status in linux-snapdragon source package in Vivid:
  New
Status in linux-ti-omap4 source package in Vivid:
  New
Status in linux source package in Wily:
  Fix Released
Status in linux-armadaxp source package in Wily:
  Invalid
Status in linux-flo source package in Wily:
  New
Status in linux-goldfish source package in Wily:
  New
Status in linux-lts-quantal source package in Wily:
  Invalid
Status in linux-lts-raring source package in Wily:
  Invalid
Status in linux-lts-saucy source package in Wily:
  Invalid
Status in linux-lts-trusty source package in Wily:
  Invalid
Status in linux-lts-utopic source package in Wily:
  Invalid
Status in linux-lts-vivid source package in Wily:
  Invalid
Status in linux-lts-wily source package in Wily:
  Invalid
Status in linux-lts-xenial source package in Wily:
  Invalid
Status in linux-mako source package in Wily:
  New
Status in linux-manta source package in Wily:
  New
Status in linux-raspi2 source package in Wily:
  Fix Released
Status in linux-snapdragon source package in Wily:
  Invalid
Status in linux-ti-omap4 source package in Wily:
  Invalid
Status in linux source package in Xenial:
  Invalid
Status in linux-armadaxp source package in Xenial:
  Invalid
Status in linux-flo source package in Xenial:
  New
Status in linux-goldfish source package in Xenial:
  New
Status in linux-lts-quantal source package in Xenial:
  Invalid
Status in linux-lts-raring source package in Xenial:
  Invalid
Status in linux-lts-saucy source package in Xenial:
  Invalid
Status in linux-lts-trusty source package in Xenial:
  Invalid
Status in linux-lts-utopic source package in Xenial:
  Invalid
Status in linux-lts-vivid source package in Xenial:
  Invalid
Status in linux-lts-wily source package in Xenial:
  Invalid
Status in linux-lts-xenial source package in Xenial:
  Invalid
Status in linux-mako source package in Xenial:
  New
Status in linux-manta source package in Xenial:
  Invalid
Status in linux-raspi2 source package in Xenial:
  Fix Committed
Status in linux-snapdragon source package in Xenial:
  Invalid
Status in linux-ti-omap4 source package in Xenial:
  Invalid
Status in linux source package in Yakkety:
  Invalid
Status in linux-armadaxp source package in Yakkety:
  Invalid
Status in linux-flo source package in Yakkety:
  New
Status in linux-goldfish source package in Yakkety:
  New
Status in linux-lts-quantal source package in Yakkety:
  Invalid
Status in linux-lts-raring source package in Yakkety:
  Invalid
Status in linux-lts-saucy source package in Yakkety:
  Invalid
Status in linux-lts-trusty source package in Yakkety:
  Invalid
Status in linux-lts-utopic source package in Yakkety:
  Invalid
Status in linux-lts-vivid source package in Yakkety:
  Invalid
Status in linux-lts-wily source package in Yakkety:
  Invalid
Status in linux-lts-xenial source package in Yakkety:
  Invalid
Status in linux-mako source package in Yakkety:
  New
Status in linux-manta source package in Yakkety:
  Invalid
Status in linux-raspi2 source package in Yakkety:
  Fix Committed
Status in linux-snapdragon source package in Yakkety:
  Invalid
Status in linux-ti-omap4 source package in Yakkety:
  Invalid

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

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References

[Bug 1549200] [NEW] CVE-2016-2549
From: Steve Beattie, 2016-02-24