CVE-2020-27815 Memory corruption in Linux Kernel

What is CVE-2020-27815?

CVE-2020-27815 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 26 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.

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.

Weakness: CWE-787, CWE-119

Which versions are affected by CVE-2020-27815?

It affects 12 products.

Products include Debian Debian Linux, Linux kernel, Netapp Aff A250 Firmware, Netapp Fas500f Firmware, Netapp H300e Firmware, Netapp H300s Firmware and 6 more.

How do I fix CVE-2020-27815?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2020-27815 being exploited?

There is no known exploitation of CVE-2020-27815 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

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• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

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

Also known as AZL-31148, AZL-34856, DEBIAN-CVE-2020-27815, UBUNTU-CVE-2020-27815.