CVE-2017-16528

Description

sound/core/seq_device.c in the Linux kernel before 4.13.4 allows local users to cause a denial of service (snd_rawmidi_dev_seq_free use-after-free and system crash) or possibly have unspecified other impact via a crafted USB device.

CVSS Metrics

• v3.1•MEDIUM•Score: 6.6CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
• v2.0•HIGH•Score: 7.2AV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 0.11%• Percentile: 30%

Techniques & Countermeasures

• CWE-416•Use After Free

  The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

• canonical•ubuntu_linux

  14.04 | 16.04

• linux•linux_kernel

  ≥ 3.19, < 4.1.47 | ≥ 4.2, < 4.4.99 | ≥ 4.5, < 4.9.63 | ≥ 4.10, < 4.13.4

References (4)

• https://usn.ubuntu.com/3619-2/
• https://github.com/torvalds/linux/commit/fc27fe7e8deef2f37cba3f2be2d52b6ca5eb9d57
• https://groups.google.com/d/msg/syzkaller/kuZzDHGkQu8/5du20rZEAAAJ
• https://usn.ubuntu.com/3619-1/