VDB
DEBIAN-CVE-2026-22693
DEBIAN-CVE-2026-22693
PUBLISHED
CVSS 5.300000190734863 MEDIUM
HarfBuzz is a text shaping engine. Prior to version 12.3.0, a null pointer dereference vulnerability exists in the SubtableUnicodesCache::create function located in src/hb-ot-cmap-table.hh. The function fails to check if hb_malloc returns NULL before using placement new to construct an object at the returned pointer address. When hb_malloc fails to allocate memory (which can occur in low-memory conditions or when using custom allocators that simulate allocation failures), it returns NULL. The code then attempts to call the constructor on this null pointer using placement new syntax, resulting in undefined behavior and a Segmentation Fault. This issue has been patched in version 12.3.0.
Risk Scores
CVSS 3.1
5.300000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | harfbuzz | 12.3.0-3, 12.3.0-2, 12.3.0-1 |
| Debian:11 | harfbuzz | 5.3.1-1, 5.3.1-2, 6.0.0+dfsg-1 |
| Debian:12 | harfbuzz | 12.3.0-3, 12.2.0-1, 12.3.0-1 |
| Debian:13 | harfbuzz | 12.1.0-1, 10.2.0-1, 0 |
Exploit Intelligence
- CPANSA-HarfBuzz-Shaper.yml (github-poc)
- harfbuzz.yml (github-poc)
Timeline
- Jan 10, 2026 CVE Published
- May 16, 2026 CVE Updated