CVE catalog

CVE-2016-7970

libass: CVE-2016-7970

Severity: High · CVSS 7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Dec 13, 2016, 8:19:14 AM UTC
Source: [NVD] · [CVE record]
EPSS: 4.66% · Oct 25, 2026

Buffer overflow in the calc_coeff function in libass/ass_blur.c in libass before 0.13.4 allows remote attackers to cause a denial of service via unspecified vectors.

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	libass	sid	`1:0.17.5-1`	fixed
Debian	libass	forky	`1:0.17.5-1`	fixed
Debian	libass	trixie	`1:0.17.3-1+deb13u1`	fixed
Debian	libass	bookworm	`1:0.17.1-1`	fixed
Debian	libass	bookworm-security	`1:0.17.1-1+deb12u1`	fixed
Alpine	libass	3.10	`0.13.4-r0`	fixed
Alpine	libass	3.11	`0.13.4-r0`	fixed
Alpine	libass	3.3	`0.13.4-r0`	fixed
Alpine	libass	3.4	`0.13.4-r0`	fixed
Alpine	libass	3.5	`0.13.4-r0`	fixed
Alpine	libass	3.6	`0.13.4-r0`	fixed
Alpine	libass	3.7	`0.13.4-r0`	fixed
Alpine	libass	3.8	`0.13.4-r0`	fixed
Alpine	libass	3.9	`0.13.4-r0`	fixed
Ubuntu	libass	pro	`0.12.3-2`	vulnerable
Ubuntu	libass	pro	`0.13.0-1`	vulnerable
Ubuntu	libass	pro	`0.13.1-1`	vulnerable
Ubuntu	libass	pro	`0.13.1-1ubuntu0.1~esm1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libass	source	sid	`0.13.4-1`	not yet assigned	Not reported	Not reported
Debian	libass	source	forky	`0.13.4-1`	not yet assigned	Not reported	Not reported
Debian	libass	source	trixie	`0.13.4-1`	not yet assigned	Not reported	Not reported
Debian	libass	source	bookworm	`0.13.4-1`	not yet assigned	Not reported	Not reported
Alpine	libass	apk	3.10	`0.13.4-r0`	Not reported	ALPINE-CVE-2016-7970	Not reported
Alpine	libass	apk	3.11	`0.13.4-r0`	Not reported	ALPINE-CVE-2016-7970	Not reported
Alpine	libass	apk	3.3	`0.13.4-r0`	Not reported	ALPINE-CVE-2016-7970	Not reported
Alpine	libass	apk	3.4	`0.13.4-r0`	Not reported	ALPINE-CVE-2016-7970	Not reported
Alpine	libass	apk	3.5	`0.13.4-r0`	Not reported	ALPINE-CVE-2016-7970	Not reported
Alpine	libass	apk	3.6	`0.13.4-r0`	Not reported	ALPINE-CVE-2016-7970	Not reported
Alpine	libass	apk	3.7	`0.13.4-r0`	Not reported	ALPINE-CVE-2016-7970	Not reported
Alpine	libass	apk	3.8	`0.13.4-r0`	Not reported	ALPINE-CVE-2016-7970	Not reported
Alpine	libass	apk	3.9	`0.13.4-r0`	Not reported	ALPINE-CVE-2016-7970	Not reported
Ubuntu	libass	deb	pro	`0.13.1-1ubuntu0.1~esm1`	Not reported	UBUNTU-CVE-2016-7970	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libass9]Fixed
Source package: [libass]
Details (2)
- 1:0.17.1-1 · amd64 · bookworm
  Fixed · Fixed: 0.13.4-1
  dsa · libass · debian · bookworm; dsa · libass · debian · 12
- 1:0.17.1-1 · arm64 · bookworm
  Fixed · Fixed: 0.13.4-1
  dsa · libass · debian · bookworm; dsa · libass · debian · 12
[libass-dev]Fixed
Source package: [libass]
Details (2)
- 1:0.17.1-1 · amd64 · bookworm
  Fixed · Fixed: 0.13.4-1
  dsa · libass · debian · bookworm; dsa · libass · debian · 12
- 1:0.17.1-1 · arm64 · bookworm
  Fixed · Fixed: 0.13.4-1
  dsa · libass · debian · bookworm; dsa · libass · debian · 12

[Debian 13 (Trixie)]

[libass9]Fixed
Source package: [libass]
Details (2)
- 1:0.17.3-1+deb13u1 · amd64 · trixie
  Fixed · Fixed: 0.13.4-1
  dsa · libass · debian · 13
- 1:0.17.3-1+deb13u1 · arm64 · trixie
  Fixed · Fixed: 0.13.4-1
  dsa · libass · debian · 13
[libass-dev]Fixed
Source package: [libass]
Details (2)
- 1:0.17.3-1+deb13u1 · amd64 · trixie
  Fixed · Fixed: 0.13.4-1
  dsa · libass · debian · 13
- 1:0.17.3-1+deb13u1 · arm64 · trixie
  Fixed · Fixed: 0.13.4-1
  dsa · libass · debian · 13

Observed: Oct 23, 2026, 5:23:20 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]