CVE-2021-46242 Use after free in n/a

High 8.8 Published 21 Jan 2022 Updated 4 Aug 2024

A heap-use-after-free vulnerability in the HDF5 library allows attackers to execute arbitrary code or cause a denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2021-46242?

CVE-2021-46242 is a high-severity use after free vulnerability in Hdfgroup Hdf5, published on 21 Jan 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

HDF5 v1.13.1-1 was discovered to contain a heap-use-after free via the component H5AC_unpin_entry.

Weakness: CWE-416

Which versions are affected by CVE-2021-46242?

It affects 1 product.

Products include Hdfgroup Hdf5.

How do I fix CVE-2021-46242?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2021-46242 being exploited?

There is no known exploitation of CVE-2021-46242 in the wild and no public exploit code.

All Hdfgroup Hdf5 vulnerabilities

Sources

Also known as DEBIAN-CVE-2021-46242, ECHO-8d02-7a22-e43e, GHSA-x9pw-hh7v-wjpf, ROOT-OS-DEBIAN-12-CVE-2021-46242, UBUNTU-CVE-2021-46242.