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Vulnerability · Published Dec 3, 2020 · Assigned by redhat

CVE-2020-14381

High 7.8

In plain English

A high-severity use-after-free in kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.8%top 42.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official description

A flaw was found in the Linux kernel’s futex implementation. This flaw allows a local attacker to corrupt system memory or escalate their privileges when creating a futex on a filesystem that is about to be unmounted. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8kernel-tools-libs-devel4.18.0-240.el8ALSA-2020:4431
Debian:12linux5.5.13-1DEBIAN-CVE-2020-14381
Debian:13linux5.5.13-1DEBIAN-CVE-2020-14381
Debian:14linux5.5.13-1DEBIAN-CVE-2020-14381
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2020-14381
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2020-14381
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2020-14381
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2020-14381

Affected products (as reported)

VendorProductVersions
n/a kernel Linux kernel 5.6-rc6

Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References