Medium severity6.7NVD Advisory· Published May 6, 2021· Updated Jun 17, 2026

CVE-2021-31916

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

208

Linux/Linux kerneldescription
Linux/Kernelllm-fuzzy
Range: <5.12
osv-coords206 versions
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pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-preempt&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/kernel-preempt&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-source-azure&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-syms-azure&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-vanilla&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2015.3 pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP2 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pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/kernel-source&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/kernel-source&distro=SUSE%20OpenStack%20Cloud%209 pkg:rpm/suse/kernel-source&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/kernel-source&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP2 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP3 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP2 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP3 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-syms&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/kernel-syms&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP2 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP3 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCL pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%209 pkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/kernel-syms&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209 pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2012%20SP5 pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP2 pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP3 pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/kernel-vanilla&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_41&distro=HPE%20Helion%20OpenStack%208 pkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_41&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSS pkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_41&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_41&distro=SUSE%20OpenStack%20Cloud%208 pkg:rpm/suse/kgraft-patch-SLE12-SP3_Update_41&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208 pkg:rpm/suse/kgraft-patch-SLE12-SP4_Update_23&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP4 pkg:rpm/suse/kgraft-patch-SLE12-SP5_Update_26&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2012%20SP5
< 4.18.0-348.el8+ 205 more
- (no CPE)range: < 4.18.0-348.el8
- (no CPE)range: < 5.3.18-59.37.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 5.3.18-38.31.1
- (no CPE)range: < 5.3.18-lp152.106.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 5.3.18-lp152.106.1.lp152.8.52.1
- (no CPE)range: < 5.3.18-59.37.2.18.23.3
- (no CPE)range: < 5.3.18-lp152.106.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 5.3.18-lp152.106.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 5.3.18-lp152.106.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 5.3.18-lp152.106.1
- (no CPE)range: < 5.3.18-59.37.3
- (no CPE)range: < 5.3.18-lp152.106.1
- (no CPE)range: < 5.3.18-59.37.1
- (no CPE)range: < 5.3.18-lp152.106.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 5.3.18-38.31.1
- (no CPE)range: < 5.3.18-lp152.106.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 5.3.18-38.31.1
- (no CPE)range: < 5.3.18-lp152.106.1
- (no CPE)range: < 5.3.18-59.37.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 5.3.18-18.75.1
- (no CPE)range: < 5.3.18-38.31.1
- (no CPE)range: < 4.12.14-16.80.1
- (no CPE)range: < 4.12.14-16.80.1
- (no CPE)range: < 5.3.18-24.96.1.9.44.1
- (no CPE)range: < 5.3.18-59.37.2.18.23.3
- (no CPE)range: < 5.3.18-24.96.1.9.44.1
- (no CPE)range: < 5.3.18-59.37.2.18.23.3
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.103.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 5.3.18-24.96.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.103.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 5.3.18-24.96.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 5.3.18-24.96.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 5.3.18-24.96.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 5.3.18-24.96.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 4.4.121-92.161.1
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.103.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.103.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-122.103.1
- (no CPE)range: < 5.3.18-24.96.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 5.3.18-24.96.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-122.103.1
- (no CPE)range: < 1-3.3.1
- (no CPE)range: < 1-5.3.1
- (no CPE)range: < 1-7.3.2
- (no CPE)range: < 1-1.3.1
- (no CPE)range: < 4.12.14-197.102.1
- (no CPE)range: < 4.12.14-197.102.1
- (no CPE)range: < 4.12.14-197.102.1
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 5.3.18-24.96.1
- (no CPE)range: < 5.3.18-59.37.3
- (no CPE)range: < 4.12.14-197.102.1
- (no CPE)range: < 4.12.14-197.102.1
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 4.12.14-150.78.2
- (no CPE)range: < 4.12.14-197.102.1
- (no CPE)range: < 4.12.14-122.103.1
- (no CPE)range: < 5.3.18-24.96.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 5.3.18-24.96.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 5.3.18-24.96.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 4.12.14-10.70.2
- (no CPE)range: < 5.3.18-62.3
- (no CPE)range: < 5.3.18-65.2
- (no CPE)range: < 5.3.18-62.2
- (no CPE)range: < 5.3.18-65.2
- (no CPE)range: < 4.12.14-10.70.2
- (no CPE)range: < 5.3.18-62.2
- (no CPE)range: < 5.3.18-65.2
- (no CPE)range: < 5.3.18-18.75.1
- (no CPE)range: < 5.3.18-38.31.1
- (no CPE)range: < 4.12.14-16.80.1
- (no CPE)range: < 4.12.14-16.80.1
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 5.3.18-24.96.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 5.3.18-24.96.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 4.4.121-92.161.1
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.103.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.103.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-10.70.2
- (no CPE)range: < 5.3.18-62.3
- (no CPE)range: < 5.3.18-65.2
- (no CPE)range: < 5.3.18-18.75.1
- (no CPE)range: < 5.3.18-38.31.1
- (no CPE)range: < 4.12.14-16.80.1
- (no CPE)range: < 4.12.14-16.80.1
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 5.3.18-24.96.1
- (no CPE)range: < 5.3.18-59.37.1
- (no CPE)range: < 4.4.121-92.161.1
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.103.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-122.103.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.4.180-94.150.1
- (no CPE)range: < 4.12.14-95.83.2
- (no CPE)range: < 4.12.14-10.70.2
- (no CPE)range: < 5.3.18-62.1
- (no CPE)range: < 5.3.18-65.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 5.3.18-59.37.2
- (no CPE)range: < 4.12.14-197.102.2
- (no CPE)range: < 4.12.14-150.78.1
- (no CPE)range: < 1-4.3.1
- (no CPE)range: < 1-4.3.1
- (no CPE)range: < 1-4.3.1
- (no CPE)range: < 1-4.3.1
- (no CPE)range: < 1-4.3.1
- (no CPE)range: < 1-6.3.1
- (no CPE)range: < 1-8.5.1

Patches

Vulnerability mechanics

References

bugzilla.redhat.com/show_bug.cginvdIssue TrackingPatchThird Party Advisory
github.com/torvalds/linux/commit/4edbe1d7bcffcd6269f3b5eb63f710393ff2ec7anvdPatchThird Party Advisory
lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlnvdMailing ListThird Party Advisory
lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlnvdMailing ListThird Party Advisory
seclists.org/oss-sec/2021/q1/268nvdMailing ListThird Party Advisory

News mentions

No linked articles in our index yet.

cvss	0.436
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000