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).
Priority
Medium
CVSS 3 base score: 5.5
Status
| Package | Release | Status |
|---|---|---|
|
linux Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(4.13.0-17.20)
|
|
|
Patches: Introduced by 21e726c4a3625a1038e97795b7aad97109ba7e19 Fixed by 814fb7bb7db5433757d76f4c4502c96fc53b0b5e |
||
|
linux-armadaxp Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-aws Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(4.15.0-1001.1)
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(4.15.0-1002.2)
|
|
|
linux-euclid Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-flo Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(4.15.0-1001.1)
|
|
|
linux-gke Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-goldfish Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-grouper Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-hwe Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
|
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Released
(4.18.0-8.9~18.04.1)
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(4.15.0-1002.2)
|
|
|
linux-linaro-omap Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-linaro-shared Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-linaro-vexpress Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-lts-quantal Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-lts-raring Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-lts-saucy Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
| This package is not directly supported by the Ubuntu Security Team | ||
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-lts-utopic Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-lts-vivid Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-lts-wily Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-maguro Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-mako Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-manta Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(4.15.0-1002.3)
|
|
|
linux-qcm-msm Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
(4.13.0-1006.6)
|
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Not vulnerable
|
|
|
linux-ti-omap4 Launchpad, Ubuntu, Debian |
Upstream |
Released
(4.14~rc3)
|
| Ubuntu 18.04 LTS (Bionic Beaver) |
Does not exist
|
|
Notes
| Author | Note |
|---|---|
| sbeattie | requires a processor with the "xsave" feature but without the "xsaves" feature (e.g. Sandy Bridge through Broadwell for Intel. |
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