UBUNTU-CVE-2026-10536

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Source
https://ubuntu.com/security/CVE-2026-10536
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10536.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-10536
Upstream
Downstream
Published
2026-06-24T14:00:00Z
Modified
2026-07-10T02:26:17.547542568Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

A use-after-free vulnerability exists in libcurl when an application configures an HTTP/2 stream-dependency tree via CURLOPT_STREAM_DEPENDS or CURLOPT_STREAM_DEPENDS_E, subsequently invokes curl_easy_reset(), and finally terminates the handle with curl_easy_cleanup(). During this final cleanup phase, libcurl attempts to access and modify an internal structure that was already freed during the reset operation.

References

Affected packages

Ubuntu:24.04:LTS / curl

Package

Name
curl
Purl
pkg:deb/ubuntu/curl?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

8.*
8.2.1-1ubuntu3
8.2.1-1ubuntu3.1
8.4.0-2ubuntu1
8.5.0-2ubuntu1
8.5.0-2ubuntu2
8.5.0-2ubuntu8
8.5.0-2ubuntu9
8.5.0-2ubuntu10
8.5.0-2ubuntu10.1
8.5.0-2ubuntu10.2
8.5.0-2ubuntu10.3
8.5.0-2ubuntu10.4
8.5.0-2ubuntu10.5
8.5.0-2ubuntu10.6
8.5.0-2ubuntu10.7
8.5.0-2ubuntu10.8
8.5.0-2ubuntu10.9
8.5.0-2ubuntu10.10
8.5.0-2ubuntu10.11

Ecosystem specific 

{
    "priority_reason": "Upstream defined this as low severity",
    "binaries": [
        {
            "binary_name": "curl",
            "binary_version": "8.5.0-2ubuntu10.11"
        },
        {
            "binary_name": "libcurl3t64-gnutls",
            "binary_version": "8.5.0-2ubuntu10.11"
        },
        {
            "binary_name": "libcurl4t64",
            "binary_version": "8.5.0-2ubuntu10.11"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10536.json"

Ubuntu:25.10 / curl

Package

Name
curl
Purl
pkg:deb/ubuntu/curl?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

8.*
8.12.1-3ubuntu1
8.13.0-5ubuntu1
8.14.1-1ubuntu2
8.14.1-1ubuntu3
8.14.1-2ubuntu1
8.14.1-2ubuntu1.1
8.14.1-2ubuntu1.2
8.14.1-2ubuntu1.3
8.14.1-2ubuntu1.4
8.14.1-2ubuntu1.5

Ecosystem specific 

{
    "priority_reason": "Upstream defined this as low severity",
    "binaries": [
        {
            "binary_name": "curl",
            "binary_version": "8.14.1-2ubuntu1.5"
        },
        {
            "binary_name": "libcurl3t64-gnutls",
            "binary_version": "8.14.1-2ubuntu1.5"
        },
        {
            "binary_name": "libcurl4t64",
            "binary_version": "8.14.1-2ubuntu1.5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10536.json"

Ubuntu:26.04:LTS / curl

Package

Name
curl
Purl
pkg:deb/ubuntu/curl?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

8.*
8.14.1-2ubuntu1
8.17.0-1ubuntu1
8.18.0-1ubuntu1
8.18.0-1ubuntu2
8.18.0-1ubuntu2.1
8.18.0-1ubuntu2.2
8.18.0-1ubuntu2.3

Ecosystem specific 

{
    "priority_reason": "Upstream defined this as low severity",
    "binaries": [
        {
            "binary_name": "curl",
            "binary_version": "8.18.0-1ubuntu2.3"
        },
        {
            "binary_name": "libcurl3t64-gnutls",
            "binary_version": "8.18.0-1ubuntu2.3"
        },
        {
            "binary_name": "libcurl4t64",
            "binary_version": "8.18.0-1ubuntu2.3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-10536.json"