CVE-2017-18221

MEDIUM

Description

The __munlock_pagevec function in mm/mlock.c in the Linux kernel before 4.11.4 allows local users to cause a denial of service (NR_MLOCK accounting corruption) via crafted use of mlockall and munlockall system calls.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=70feee0e1ef331b22cc51f383d532a0d043fbdcc

http://www.securityfocus.com/bid/103321

https://github.com/torvalds/linux/commit/70feee0e1ef331b22cc51f383d532a0d043fbdcc

https://usn.ubuntu.com/3655-1/

https://usn.ubuntu.com/3655-2/

https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.4

Details

Source: MITRE

Published: 2018-03-07

Updated: 2018-05-31

Type: CWE-20

Risk Information

CVSS v2.0

Base Score: 4.9

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3.0

Base Score: 5.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM