Description
HarfBuzz before 1.0.4 allows remote attackers to cause a denial of service (invalid read of two bytes and application crash) because of GPOS and GSUB table mishandling, related to hb-ot-layout-gpos-table.hh, hb-ot-layout-gsub-table.hh, and hb-ot-layout-gsubgpos-private.hh.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | harfbuzz | 1.2.6-1 | — |
| Debian 13 | harfbuzz | 1.2.6-1 | — |
| Debian 12 | harfbuzz | 1.2.6-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | harfbuzz | 1.0.1-1ubuntu0.1+esm1 | USN-5746-1 |
Advisories 1
- USN-5746-1 harfbuzz vulnerability Ubuntu Security Notices (USN) · Jun 25, 2026