CVE-2020-24994: High severity Libass Project Libass vulnerability
Last updated 26 August 2025
Other sources
Stack overflow in the parsetag function in libass/assparse.c in libass before 0.15.0 allows remote attackers to cause a denial of service or remote code execution via a crafted file.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/libassto a version that resolves this vulnerability.Fixed in 1:0.17.1-1Fixed in 1:0.17.1-1+deb12u1Fixed in 1:0.17.3-1+deb13u1Fixed in 1:0.17.5-1 - Upgrade
Upgrade
libassto a version that resolves this vulnerability.Fixed in 0.15.0
Event History
Frequently Asked Questions
What is CVE-2020-24994?
CVE-2020-24994 is a vulnerability in libass before version 0.15.0 that allows remote attackers to cause a denial of service or remote code execution.
What is the severity of CVE-2020-24994?
The severity of CVE-2020-24994 is high with a CVSS score of 8.8.
How can the CVE-2020-24994 vulnerability be exploited?
CVE-2020-24994 can be exploited remotely by sending a crafted file to the vulnerable system.
How can I fix CVE-2020-24994?
To fix CVE-2020-24994, update libass to version 0.15.0 or later.
Where can I find more information about CVE-2020-24994?
You can find more information about CVE-2020-24994 in the references provided: [Reference 1](https://github.com/libass/libass/commit/6835731c2fe4164a0c50bc91d12c43b2a2b4e), [Reference 2](https://github.com/libass/libass/issues/422), [Reference 3](https://github.com/libass/libass/issues/422#issuecomment-806002919)