CVE-2026-20216
Publication date 2 July 2026
Last updated 9 July 2026
Ubuntu priority
Description
A vulnerability in the InstallShield file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device. This vulnerability is due to improper handling of temporary resources during file scanning. An attacker could exploit this vulnerability by submitting a crafted InstallShield file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the ClamAV scanning process and temporarily consume available system resources, resulting in a DoS condition on the affected software.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| clamav | 26.04 LTS resolute |
Fixed 1.5.3+dfsg-0ubuntu0.26.04.1
|
| 24.04 LTS noble |
Fixed 1.5.3+dfsg-0ubuntu0.24.04.1
|
|
| 22.04 LTS jammy |
Fixed 1.5.3+dfsg-0ubuntu0.22.04.2
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
|
| 14.04 LTS trusty |
Needs evaluation
|
Notes
leosilva
Building ClamAV requires rust compiler >= 1.61 releases as bionic, xenial and trusty are not covered by that version of rustc. ClamAV new versions can't build in these releases anymore.
Severity score breakdown
CVSS version: CVSS v3.0
Base score
7.5 · High
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
Related Ubuntu Security Notices (USN)
- USN-8517-1
- ClamAV vulnerabilities
- 8 July 2026