CVE-2017-15537
Published: 17 October 2017
The x86/fpu (Floating Point Unit) subsystem in the Linux kernel before 4.13.5, when a processor supports the xsave feature but not the xsaves feature, does not correctly handle attempts to set reserved bits in the xstate header via the ptrace() or rt_sigreturn() system call, allowing local users to read the FPU registers of other processes on the system, related to arch/x86/kernel/fpu/regset.c and arch/x86/kernel/fpu/signal.c.
From the Ubuntu Security Team
Dmitry Vyukov discovered that the Floating Point Unit (fpu) subsystem in the Linux kernel did not properly handle attempts to set reserved bits in a task's extended state (xstate) area. A local attacker could use this to cause a denial of service (system crash).
Notes
Author | Note |
---|---|
sbeattie | requires a processor with the "xsave" feature but without the "xsaves" feature (e.g. Sandy Bridge through Broadwell for Intel. |
Priority
Status
Package | Release | Status |
---|---|---|
linux-raspi2 Launchpad, Ubuntu, Debian |
xenial |
Released
(4.4.0-1076.84)
|
zesty |
Ignored
(end of life)
|
|
artful |
Released
(4.13.0-1006.6)
|
|
trusty |
Does not exist
|
|
bionic |
Not vulnerable
(4.13.0-1006.6)
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
artful |
Released
(4.4.0-1078.83)
|
trusty |
Does not exist
|
|
xenial |
Released
(4.4.0-1078.83)
|
|
zesty |
Released
(4.4.0-1078.83)
|
|
bionic |
Not vulnerable
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-ti-omap4 Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
linux Launchpad, Ubuntu, Debian |
artful |
Released
(4.13.0-17.20)
|
zesty |
Ignored
(end of life)
|
|
bionic |
Not vulnerable
(4.13.0-17.20)
|
|
upstream |
Released
(4.14~rc3)
|
|
trusty |
Not vulnerable
|
|
xenial |
Released
(4.4.0-98.121)
|
|
Patches: Introduced by 21e726c4a3625a1038e97795b7aad97109ba7e19 |
||
linux-armadaxp Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
bionic |
Does not exist
|
|
This package is not directly supported by the Ubuntu Security Team | ||
linux-aws Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Not vulnerable
(4.4.0-1002.2)
|
|
xenial |
Released
(4.4.0-1039.48)
|
|
zesty |
Does not exist
|
|
bionic |
Not vulnerable
(4.15.0-1001.1)
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-azure Launchpad, Ubuntu, Debian |
trusty |
Not vulnerable
(4.15.0-1023.24~14.04.1)
|
xenial |
Released
(4.13.0-1005.7)
|
|
zesty |
Does not exist
|
|
bionic |
Not vulnerable
(4.15.0-1002.2)
|
|
upstream |
Released
(4.14~rc3)
|
|
artful |
Does not exist
|
|
linux-euclid Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
xenial |
Ignored
(was needed ESM criteria)
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-flo Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
xenial |
Ignored
(abandoned)
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-gcp Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
xenial |
Released
(4.13.0-1002.5)
|
|
zesty |
Does not exist
|
|
bionic |
Not vulnerable
(4.15.0-1001.1)
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-gke Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
xenial |
Released
(4.4.0-1033.33)
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
xenial |
Ignored
(end of life, was needed)
|
|
zesty |
Ignored
(end of life)
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-grouper Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-hwe Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
xenial |
Released
(4.13.0-26.29~16.04.2)
|
|
zesty |
Does not exist
|
|
bionic |
Not vulnerable
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
xenial |
Released
(4.13.0-26.29~16.04.2)
|
|
zesty |
Does not exist
|
|
bionic |
Released
(4.18.0-8.9~18.04.1)
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-kvm Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
xenial |
Released
(4.4.0-1009.14)
|
|
zesty |
Does not exist
|
|
bionic |
Not vulnerable
(4.15.0-1002.2)
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-linaro-omap Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-linaro-shared Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-linaro-vexpress Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
linux-lts-quantal Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
This package is not directly supported by the Ubuntu Security Team | ||
linux-lts-raring Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-lts-saucy Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
This package is not directly supported by the Ubuntu Security Team | ||
linux-lts-trusty Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Ignored
(end of life, was needs-triage)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
(trusty was ignored [end of standard support])
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Released
(4.4.0-98.121~14.04.1)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-maguro Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-mako Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
xenial |
Ignored
(abandoned)
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-manta Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
(trusty was ignored [abandoned])
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
bionic |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-oem Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
trusty |
Does not exist
|
|
xenial |
Not vulnerable
(4.13.0-1008.9)
|
|
zesty |
Does not exist
|
|
bionic |
Not vulnerable
(4.15.0-1002.3)
|
|
upstream |
Released
(4.14~rc3)
|
|
linux-qcm-msm Launchpad, Ubuntu, Debian |
artful |
Does not exist
|
bionic |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(4.14~rc3)
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.5 |
Attack vector | Local |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15537
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=814fb7bb7db5433757d76f4c4502c96fc53b0b5e
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5
- https://github.com/torvalds/linux/commit/814fb7bb7db5433757d76f4c4502c96fc53b0b5e
- https://ubuntu.com/security/notices/USN-3469-1
- https://ubuntu.com/security/notices/USN-3469-2
- https://ubuntu.com/security/notices/USN-3487-1
- NVD
- Launchpad
- Debian