UBUNTU-CVE-2026-89092

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Source
https://ubuntu.com/security/CVE-2026-89092
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89092.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-89092
Upstream
  • CVE-2026-89092
Published
2026-09-14T00:00:00Z
Modified
2026-09-14T11:17:33Z
Severity
  • 4.2 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

The nscd service in the GNU C Library 2.3.4 onwards may crash due to a stack overflow when a malicious DNS server returns too large a response for a DNS query, resulting in degraded DNS resolution for the system. Exploitation of this bug needs a system that has nscd enabled and using an untrusted DNS server for name resolution, with the compromised DNS server being capable of processing records large enough to result in a stack overflow in an nscd thread stack.  During experimentation, bind 9 was unable to handle large records, but that could change in future or with a different name server.  In typical installations, nscd is executed in an isolated context as its own user without a shell, due to which any compromise of that service is isolated. There is a remote possibility of nscd cache corruption if an attacker manages to get the stack pointer into a desired point in the heap, potentially resulting in other caches in nscd being overwritten with corrupt data through the stack overflow, until the buggy code path eventually results in a crash. Finally, a crash in nscd may result in performance degradation when resolving names, but it does not result in a denial of service.

References

Affected packages

Ubuntu:22.04:LTS
glibc

Package

Name
glibc
Purl
pkg:deb/ubuntu/glibc?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*
2.34-0ubuntu3
2.35-0ubuntu1
2.35-0ubuntu3
2.35-0ubuntu3.1
2.35-0ubuntu3.3
2.35-0ubuntu3.4
2.35-0ubuntu3.5
2.35-0ubuntu3.6
2.35-0ubuntu3.7
2.35-0ubuntu3.8
2.35-0ubuntu3.9
2.35-0ubuntu3.10
2.35-0ubuntu3.11
2.35-0ubuntu3.12
2.35-0ubuntu3.13
2.35-0ubuntu3.14
2.35-0ubuntu3.15

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "glibc-source",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "libc-devtools",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "libc6-prof",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "libc6-s390",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.35-0ubuntu3.15"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.35-0ubuntu3.15"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89092.json"
Ubuntu:24.04:LTS
glibc

Package

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

Affected ranges

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

Affected versions

2.*
2.38-1ubuntu6
2.38-3ubuntu1
2.39-0ubuntu1
2.39-0ubuntu2
2.39-0ubuntu6
2.39-0ubuntu8
2.39-0ubuntu8.1
2.39-0ubuntu8.2
2.39-0ubuntu8.3
2.39-0ubuntu8.4
2.39-0ubuntu8.5
2.39-0ubuntu8.6
2.39-0ubuntu8.7
2.39-0ubuntu8.8
2.39-0ubuntu8.9

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "glibc-source",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "libc-devtools",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "libc6-s390",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.39-0ubuntu8.9"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.39-0ubuntu8.9"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89092.json"
Ubuntu:26.04:LTS
glibc

Package

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

Affected ranges

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

Affected versions

2.*
2.42-0ubuntu3
2.42-2ubuntu1
2.42-2ubuntu2
2.42-2ubuntu4
2.42-2ubuntu5
2.43-2ubuntu1
2.43-2ubuntu2
2.43-2ubuntu2.3
2.43-2ubuntu2.4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "glibc-source",
            "binary_version": "2.43-2ubuntu2.4"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.43-2ubuntu2.4"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.43-2ubuntu2.4"
        },
        {
            "binary_name": "libc-devtools",
            "binary_version": "2.43-2ubuntu2.4"
        },
        {
            "binary_name": "libc-gconv-modules-extra",
            "binary_version": "2.43-2ubuntu2.4"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.43-2ubuntu2.4"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.43-2ubuntu2.4"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.43-2ubuntu2.4"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.43-2ubuntu2.4"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.43-2ubuntu2.4"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.43-2ubuntu2.4"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.43-2ubuntu2.4"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.43-2ubuntu2.4"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.43-2ubuntu2.4"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.43-2ubuntu2.4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89092.json"
Ubuntu:Pro:14.04:LTS
eglibc

Package

Name
eglibc
Purl
pkg:deb/ubuntu/eglibc?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

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

Affected versions

2.*
2.17-93ubuntu4
2.18-0ubuntu1
2.18-0ubuntu2
2.18-0ubuntu4
2.18-0ubuntu5
2.18-0ubuntu6
2.18-0ubuntu7
2.19-0ubuntu2
2.19-0ubuntu3
2.19-0ubuntu4
2.19-0ubuntu5
2.19-0ubuntu6
2.19-0ubuntu6.1
2.19-0ubuntu6.3
2.19-0ubuntu6.4
2.19-0ubuntu6.5
2.19-0ubuntu6.6
2.19-0ubuntu6.7
2.19-0ubuntu6.8
2.19-0ubuntu6.9
2.19-0ubuntu6.10
2.19-0ubuntu6.11
2.19-0ubuntu6.13
2.19-0ubuntu6.14
2.19-0ubuntu6.15
2.19-0ubuntu6.15+esm1
2.19-0ubuntu6.15+esm2
2.19-0ubuntu6.15+esm3
2.19-0ubuntu6.15+esm4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "eglibc-source",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-prof",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "multiarch-support",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.19-0ubuntu6.15+esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89092.json"
Ubuntu:Pro:16.04:LTS
glibc

Package

Name
glibc
Purl
pkg:deb/ubuntu/glibc?arch=source&distro=esm-infra%2Fxenial

Affected ranges

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

Affected versions

2.*
2.21-0ubuntu4
2.21-0ubuntu5
2.21-0ubuntu6
2.23-0ubuntu1
2.23-0ubuntu2
2.23-0ubuntu3
2.23-0ubuntu4
2.23-0ubuntu5
2.23-0ubuntu6
2.23-0ubuntu7
2.23-0ubuntu9
2.23-0ubuntu10
2.23-0ubuntu11
2.23-0ubuntu11.2
2.23-0ubuntu11.3
2.23-0ubuntu11.3+esm1
2.23-0ubuntu11.3+esm2
2.23-0ubuntu11.3+esm3
2.23-0ubuntu11.3+esm5
2.23-0ubuntu11.3+esm6
2.23-0ubuntu11.3+esm7
2.23-0ubuntu11.3+esm8
2.23-0ubuntu11.3+esm9

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "glibc-source",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "libc6-s390",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "multiarch-support",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.23-0ubuntu11.3+esm9"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89092.json"
Ubuntu:Pro:18.04:LTS
glibc

Package

Name
glibc
Purl
pkg:deb/ubuntu/glibc?arch=source&distro=esm-infra%2Fbionic

Affected ranges

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

Affected versions

2.*
2.26-0ubuntu2
2.26-0ubuntu2.1
2.27-0ubuntu2
2.27-0ubuntu3
2.27-3ubuntu1
2.27-3ubuntu1.2
2.27-3ubuntu1.3
2.27-3ubuntu1.4
2.27-3ubuntu1.5
2.27-3ubuntu1.6
2.27-3ubuntu1.6+esm1
2.27-3ubuntu1.6+esm2
2.27-3ubuntu1.6+esm3
2.27-3ubuntu1.6+esm4
2.27-3ubuntu1.6+esm5
2.27-3ubuntu1.6+esm6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "glibc-source",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc6-lse",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc6-s390",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "multiarch-support",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.27-3ubuntu1.6+esm6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89092.json"
Ubuntu:Pro:20.04:LTS
glibc

Package

Name
glibc
Purl
pkg:deb/ubuntu/glibc?arch=source&distro=esm-infra%2Ffocal

Affected ranges

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

Affected versions

2.*
2.30-0ubuntu2
2.30-0ubuntu3
2.31-0ubuntu5
2.31-0ubuntu6
2.31-0ubuntu7
2.31-0ubuntu9
2.31-0ubuntu9.1
2.31-0ubuntu9.2
2.31-0ubuntu9.3
2.31-0ubuntu9.7
2.31-0ubuntu9.9
2.31-0ubuntu9.12
2.31-0ubuntu9.14
2.31-0ubuntu9.15
2.31-0ubuntu9.16
2.31-0ubuntu9.17
2.31-0ubuntu9.18
2.31-0ubuntu9.18+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "glibc-source",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc-bin",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc-dev-bin",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc6",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc6-amd64",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc6-armel",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc6-dev-amd64",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc6-dev-armel",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc6-dev-i386",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc6-dev-s390",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc6-dev-x32",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc6-i386",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc6-lse",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc6-pic",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc6-prof",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc6-s390",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "libc6-x32",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "locales",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "locales-all",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        },
        {
            "binary_name": "nscd",
            "binary_version": "2.31-0ubuntu9.18+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-89092.json"