CVE-2021-31916

MEDIUM

Linux Kernel < 5.12 - Out-of-Bounds Write

Title source: rule
STIX 2.1

Description

An out-of-bounds (OOB) memory write flaw was found in list_devices in drivers/md/dm-ioctl.c in the Multi-device driver module in the Linux kernel before 5.12. A bound check failure allows an attacker with special user (CAP_SYS_ADMIN) privilege to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.

References (5)

Core 5
Core References
Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1946965
Mailing List, Third Party Advisory x_refsource_misc
https://seclists.org/oss-sec/2021/q1/268
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

Scores

CVSS v3 6.7
EPSS 0.0011
EPSS Percentile 28.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (4)
debian/debian_linux 9.0
linux/linux_kernel < 5.12
redhat/enterprise_linux 7.0
redhat/enterprise_linux 8.0
Published May 06, 2021
Tracked Since Feb 18, 2026