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Vulnerability · Published May 10, 2021 · Assigned by talos

CVE-2020-28588

Medium 4.0

In plain English

A medium-severity security flaw 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 1.1% (higher than 66% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.0)4.0Medium
Exploit odds (30 days)1.1%top 34.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

An information disclosure vulnerability exists in the /proc/pid/syscall functionality of Linux Kernel 5.1 Stable and 5.4.66. More specifically, this issue has been introduced in v5.1-rc4 (commit 631b7abacd02b88f4b0795c08b54ad4fc3e7c7c0) and is still present in v5.10-rc4, so it’s likely that all versions in between are affected. An attacker can read /proc/pid/syscall to trigger this vulnerability, which leads to the kernel leaking memory contents.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.9.15-1DEBIAN-CVE-2020-28588
Debian:13linux5.9.15-1DEBIAN-CVE-2020-28588
Debian:14linux5.9.15-1DEBIAN-CVE-2020-28588
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2020-28588
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2020-28588
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2020-28588

Affected products (as reported)

VendorProductVersions
n/a Linux Kernel Linux Kernel v5.10-rc4,Linux Kernel v5.4.66,Linux Kernel v5.9.8

Weakness: CWE-681 · Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References