UBUNTU-CVE-2021-22945

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Source
https://ubuntu.com/security/CVE-2021-22945
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-22945.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-22945
Upstream
Downstream
Related
Published
2021-09-15T00:00:00Z
Modified
2025-09-08T16:46:59Z
Severity
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it again.

References

Affected packages

Ubuntu:22.04:LTS / curl

Package

Name
curl
Purl
pkg:deb/ubuntu/curl@7.74.0-1.3ubuntu2?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7.74.0-1.3ubuntu2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "curl",
            "binary_version": "7.74.0-1.3ubuntu2"
        },
        {
            "binary_name": "libcurl3-gnutls",
            "binary_version": "7.74.0-1.3ubuntu2"
        },
        {
            "binary_name": "libcurl3-nss",
            "binary_version": "7.74.0-1.3ubuntu2"
        },
        {
            "binary_name": "libcurl4",
            "binary_version": "7.74.0-1.3ubuntu2"
        },
        {
            "binary_name": "libcurl4-gnutls-dev",
            "binary_version": "7.74.0-1.3ubuntu2"
        },
        {
            "binary_name": "libcurl4-nss-dev",
            "binary_version": "7.74.0-1.3ubuntu2"
        },
        {
            "binary_name": "libcurl4-openssl-dev",
            "binary_version": "7.74.0-1.3ubuntu2"
        }
    ]
}