What’s Vulnerable › Vulnerabilities
CVE-2021-3612
- Severity: high (CVSS 7.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-07-09 · updated 2026-06-17
- Weakness: CWE-20
Description
An out-of-bounds memory write flaw was found in the Linux kernel's joystick devices subsystem in versions before 5.9-rc1, in the way the user calls ioctl JSIOCSBTNMAP. This flaw allows a local user to crash the system or possibly escalate their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Affected products
- Debian Linux: 9.0
- Fedoraproject Fedora: 34
- Linux kernel: before 5.9.0 — fixed in 5.9.0
- NetApp Cloud Backup: all versions
- NetApp H300E Firmware: all versions
- NetApp H300S Firmware: all versions
- NetApp H410C Firmware: all versions
- NetApp H410S Firmware: all versions
- NetApp H500E Firmware: all versions
- NetApp H500S Firmware: all versions
- NetApp H700E Firmware: all versions
- NetApp H700S Firmware: all versions
- NetApp Solidfire Baseboard Management Controller Firmware: all versions
- Oracle Communications Cloud Native Core Binding Support Function: 22.1.3
- Oracle Communications Cloud Native Core Network Exposure Function: 22.1.1
- Oracle Communications Cloud Native Core Policy: 22.2.0
- Red Hat Enterprise Linux: 7.0, 8.0
How to fix
Upgrade to a fixed version: Linux kernel 5.9.0. Check the vendor advisory for mitigations.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1974079
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YKGI562LFV5MESTMVTCG5RORSBT6NGBN/
- https://lore.kernel.org/linux-input/20210620120030.1513655-1-avlarkin82%40gmail.com/
- https://security.netapp.com/advisory/ntap-20210805-0005/
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1974079
- https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
- https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YKGI562LFV5MESTMVTCG5RORSBT6NGBN/
- https://lore.kernel.org/linux-input/20210620120030.1513655-1-avlarkin82%40gmail.com/
Get alerted when CVE-2021-3612 or the next vulnerability affects your stack