---
title: CVE-2026-20213
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2026-20213
---

# CVE-2026-20213

Publication date 2 July 2026

Last updated 9 July 2026

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2026-20213#impact-score)

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## Description

A vulnerability in the PE 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 PE
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 PE content 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.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2026-20213#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| clamav | 26.04 LTS resolute | Fixed 1.5.3+dfsg-0ubuntu0.26.04.1 |
| 25.10 questing | Ignored end of life, was needs-triage |
| 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 |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Notes

---

### [leosilva](https://launchpad.net/~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

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | None |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20213)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-20213)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-20213)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-20213)

### Related Ubuntu Security Notices (USN)

+ [USN-8517-1](https://usn.ubuntu.com/USN-8517-1)
+ ClamAV vulnerabilities
+ 8 July 2026

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-20213>
* <https://blog.clamav.net/2026/07/clamav-153-and-145-security-patch.html>