CVE catalog

CVE-2021-45931

harfbuzz: CVE-2021-45931

Severity: Low
Source: [NVD] · [CVE record]
EPSS: 1.84% · Oct 25, 2026

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).

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	harfbuzz	sid	`12.3.2-2`	not affected
Debian	harfbuzz	forky	`12.3.2-2`	not affected
Debian	harfbuzz	trixie	`10.2.0-1+deb13u1`	not affected
Debian	harfbuzz	bookworm	`6.0.0+dfsg-3`	not affected

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	harfbuzz	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	harfbuzz	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	harfbuzz	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	harfbuzz	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[gir1.2-harfbuzz-0.0]Not affected
Source package: [harfbuzz]
Details (2)
- 6.0.0+dfsg-3 · amd64 · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
- 6.0.0+dfsg-3 · arm64 · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
[libharfbuzz0b]Not affected
Source package: [harfbuzz]
Details (2)
- 6.0.0+dfsg-3 · amd64 · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
- 6.0.0+dfsg-3 · arm64 · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
[libharfbuzz-bin]Not affected
Source package: [harfbuzz]
Details (2)
- 6.0.0+dfsg-3 · amd64 · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
- 6.0.0+dfsg-3 · arm64 · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
[libharfbuzz-dev]Not affected
Source package: [harfbuzz]
Details (2)
- 6.0.0+dfsg-3 · amd64 · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
- 6.0.0+dfsg-3 · arm64 · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
[libharfbuzz-doc]Not affected
Source package: [harfbuzz]
Details (2)
- 6.0.0+dfsg-3 · all · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
- 6.0.0+dfsg-3 · all · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
[libharfbuzz-gobject0]Not affected
Source package: [harfbuzz]
Details (2)
- 6.0.0+dfsg-3 · amd64 · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
- 6.0.0+dfsg-3 · arm64 · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
[libharfbuzz-icu0]Not affected
Source package: [harfbuzz]
Details (2)
- 6.0.0+dfsg-3 · amd64 · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
- 6.0.0+dfsg-3 · arm64 · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
[libharfbuzz-subset0]Not affected
Source package: [harfbuzz]
Details (2)
- 6.0.0+dfsg-3 · amd64 · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm
- 6.0.0+dfsg-3 · arm64 · bookworm
  Not affected
  dsa · harfbuzz · debian · bookworm

Observed: Oct 23, 2026, 6:04:01 PM UTC

References

[https://security-tracker.debian.org/tracker/CVE-2021-45931]

[Debian Security Tracker] · [FIRST EPSS]