CVE-2026-20214
Publication date 2 July 2026
Last updated 9 July 2026
Ubuntu priority
Description
A vulnerability in the FSG file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition, or possibly other expanded impacts, resulting from memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in FSG files during scanning, which may result in an out-of-bounds buffer write. An attacker could exploit this vulnerability by submitting a crafted file that contains portable executable content compressed with FSG to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, 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