UBUNTU-CVE-2026-3593

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Source
https://ubuntu.com/security/CVE-2026-3593
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3593.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-3593
Upstream
Downstream
Related
Published
2026-05-20T00:00:00Z
Modified
2026-05-29T10:45:34.583024670Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H CVSS Calculator
  • 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 - medium
Summary
[none]
Details

A use-after-free vulnerability exists within the DNS-over-HTTPS implementation. This issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions 9.18.0 through 9.18.48 and 9.18.11-S1 through 9.18.48-S1 are NOT affected.

References

Affected packages

Ubuntu:20.04:LTS / bind9-libs

Package

Name
bind9-libs
Purl
pkg:deb/ubuntu/bind9-libs?arch=source&distro=focal

Affected ranges

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

Affected versions

1:9.*
1:9.11.16+dfsg-3~build1
1:9.11.16+dfsg-3~ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1",
            "binary_name": "libbind9-161"
        },
        {
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1",
            "binary_name": "libdns-export1109"
        },
        {
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1",
            "binary_name": "libdns1109"
        },
        {
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1",
            "binary_name": "libirs-export161"
        },
        {
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1",
            "binary_name": "libirs161"
        },
        {
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1",
            "binary_name": "libisc-export1105"
        },
        {
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1",
            "binary_name": "libisc1105"
        },
        {
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1",
            "binary_name": "libisccc-export161"
        },
        {
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1",
            "binary_name": "libisccc161"
        },
        {
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1",
            "binary_name": "libisccfg-export163"
        },
        {
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1",
            "binary_name": "libisccfg163"
        },
        {
            "binary_version": "1:9.11.16+dfsg-3~ubuntu1",
            "binary_name": "liblwres161"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3593.json"

Ubuntu:22.04:LTS / bind9-libs

Package

Name
bind9-libs
Purl
pkg:deb/ubuntu/bind9-libs?arch=source&distro=jammy

Affected ranges

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

Affected versions

1:9.*
1:9.11.19+dfsg-2.1ubuntu1
1:9.11.19+dfsg-2.1ubuntu2
1:9.11.19+dfsg-2.1ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3",
            "binary_name": "libbind9-161"
        },
        {
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3",
            "binary_name": "libdns-export1110"
        },
        {
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3",
            "binary_name": "libdns1110"
        },
        {
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3",
            "binary_name": "libirs-export161"
        },
        {
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3",
            "binary_name": "libirs161"
        },
        {
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3",
            "binary_name": "libisc-export1105"
        },
        {
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3",
            "binary_name": "libisc1105"
        },
        {
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3",
            "binary_name": "libisccc-export161"
        },
        {
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3",
            "binary_name": "libisccc161"
        },
        {
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3",
            "binary_name": "libisccfg-export163"
        },
        {
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3",
            "binary_name": "libisccfg163"
        },
        {
            "binary_version": "1:9.11.19+dfsg-2.1ubuntu3",
            "binary_name": "liblwres161"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3593.json"

Ubuntu:25.10 / bind9

Package

Name
bind9
Purl
pkg:deb/ubuntu/bind9?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:9.20.11-1ubuntu2.4

Affected versions

1:9.*
1:9.20.4-3ubuntu1
1:9.20.4-3ubuntu2
1:9.20.4-3ubuntu3
1:9.20.9-2ubuntu1
1:9.20.10-1ubuntu1
1:9.20.11-1ubuntu1
1:9.20.11-1ubuntu2
1:9.20.11-1ubuntu2.1
1:9.20.11-1ubuntu2.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:9.20.11-1ubuntu2.4",
            "binary_name": "bind9"
        },
        {
            "binary_version": "1:9.20.11-1ubuntu2.4",
            "binary_name": "bind9-dnsutils"
        },
        {
            "binary_version": "1:9.20.11-1ubuntu2.4",
            "binary_name": "bind9-host"
        },
        {
            "binary_version": "1:9.20.11-1ubuntu2.4",
            "binary_name": "bind9-libs"
        },
        {
            "binary_version": "1:9.20.11-1ubuntu2.4",
            "binary_name": "bind9-utils"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3593.json"

Ubuntu:26.04:LTS / bind9

Package

Name
bind9
Purl
pkg:deb/ubuntu/bind9?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1:9.20.18-1ubuntu2.1

Affected versions

1:9.*
1:9.20.11-1ubuntu2
1:9.20.11-1ubuntu3
1:9.20.18-1ubuntu1
1:9.20.18-1ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1:9.20.18-1ubuntu2.1",
            "binary_name": "bind9"
        },
        {
            "binary_version": "1:9.20.18-1ubuntu2.1",
            "binary_name": "bind9-dnsutils"
        },
        {
            "binary_version": "1:9.20.18-1ubuntu2.1",
            "binary_name": "bind9-host"
        },
        {
            "binary_version": "1:9.20.18-1ubuntu2.1",
            "binary_name": "bind9-libs"
        },
        {
            "binary_version": "1:9.20.18-1ubuntu2.1",
            "binary_name": "bind9-utils"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-3593.json"