CVE-2017-18221

low-risk
Published 2018-03-07

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.

Do I need to act?

-
0.10% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (12)

Patch http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=70feee...
Third Party Advisory http://www.securityfocus.com/bid/103321
Patch https://github.com/torvalds/linux/commit/70feee0e1ef331b22cc51f383d532a0d043fbdc...
https://usn.ubuntu.com/3655-1/
https://usn.ubuntu.com/3655-2/
Release Notes https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.4
Patch http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=70feee...
Third Party Advisory http://www.securityfocus.com/bid/103321
Patch https://github.com/torvalds/linux/commit/70feee0e1ef331b22cc51f383d532a0d043fbdc...
https://usn.ubuntu.com/3655-1/
https://usn.ubuntu.com/3655-2/
Release Notes https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.4
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal