CVE-2020-28588 Information disclosure in Linux Kernel

What is CVE-2020-28588?

CVE-2020-28588 is a medium-severity vulnerability in Linux kernel, published on 10 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.

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.

Weakness: CWE-681

Which versions are affected by CVE-2020-28588?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2020-28588?

Apply the vendor's patch.

Is CVE-2020-28588 being exploited?

There is no known exploitation of CVE-2020-28588 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2020-28588, GHSA-xxv6-ggg8-68mq, UBUNTU-CVE-2020-28588.