CVE-2026-0943 Null dereference in HarfBuzz::Shaper
A null pointer dereference in the bundled HarfBuzz library allows attackers to cause a denial of service in Perl applications using HarfBuzz::Shaper.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-0943?
CVE-2026-0943 is a high-severity vulnerability in JV HarfBuzz::Shaper, published on 19 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
HarfBuzz::Shaper versions before 0.032 for Perl contains a bundled library with a null pointer dereference vulnerability.
Versions before 0.032 contain HarfBuzz 8.4.0 or earlier bundled as hb_src.tar.gz in the source tarball, which is affected by CVE-2026-22693.
Which versions are affected by CVE-2026-0943?
It affects 1 product.
Products include Jv Harfbuzz\.
How do I fix CVE-2026-0943?
No fix has been published for CVE-2026-0943 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-0943 being exploited?
There is no known exploitation of CVE-2026-0943 in the wild and no public exploit code.
Sources
Also known as GHSA-hmr2-524c-vv28, UBUNTU-CVE-2026-0943.