Description
libass 0.15.x before 0.15.1 has a heap-based buffer overflow in decode_chars (called from decode_font and process_text) because the wrong integer data type is used for subtraction.
References (5)
Core 5
Core References
Third Party Advisory x_refsource_misc
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libass/OSV-2020-2099.yaml
Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26674
Patch, Third Party Advisory x_refsource_misc
https://github.com/libass/libass/commit/017137471d0043e0321e377ed8da48e45a3ec632
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6JUXFQUJ32GWG5E46A63DFDCYJAF3VU6/
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202208-13
Scores
CVSS v3
7.8
EPSS
0.0031
EPSS Percentile
54.3%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Details
CWE
CWE-787
Status
published
Products (2)
fedoraproject/fedora
34
libass_project/libass
0.15.0 - 0.15.1
Published
Jul 20, 2021
Tracked Since
Feb 18, 2026