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Vulnerability · Published May 26, 2021 · Assigned by redhat

CVE-2020-27815

High 7.8

In plain English

A high-severity memory corruption in Linux 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 56% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.8%top 43.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC

Official description

A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the ability to set extended attributes to panic the system, causing memory corruption or escalating privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.10.4-1DEBIAN-CVE-2020-27815
Debian:13linux5.10.4-1DEBIAN-CVE-2020-27815
Debian:14linux5.10.4-1DEBIAN-CVE-2020-27815
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2020-27815
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2020-27815
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2020-27815

Affected products (as reported)

VendorProductVersions
n/a Linux Kernel 5.9.6

Weakness: CWE-119

References