CVE-2021-45931 Memory corruption in n/a

What is CVE-2021-45931?

CVE-2021-45931 is a medium-severity memory corruption vulnerability in Fedoraproject Fedora, published on 31 Dec 2021. 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

HarfBuzz 2.9.0 has an out-of-bounds write in hb_bit_set_invertible_t::set (called from hb_sparseset_t<hb_bit_set_invertible_t>::set and hb_set_copy).

Weakness: CWE-787

Which versions are affected by CVE-2021-45931?

It affects 2 products.

Products include Fedoraproject Fedora, Harfbuzz Project Harfbuzz.

How do I fix CVE-2021-45931?

No fix has been published for CVE-2021-45931 yet. Limit exposure of the affected software until one is available.

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

Is CVE-2021-45931 being exploited?

There is no known exploitation of CVE-2021-45931 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

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

Also known as GHSA-77w9-6m5g-vpj2.