UBUNTU-CVE-2026-41992

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Source
https://ubuntu.com/security/CVE-2026-41992
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41992.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-41992
Upstream
  • CVE-2026-41992
Downstream
Related
Published
2026-06-29T12:16:00Z
Modified
2026-07-06T20:30:59.127897385Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

GNU gzip contains a global buffer overflow vulnerability in the LZH decompression logic caused by improper reuse of shared global state between different decompression formats within a single execution. GNU gzip maintains a global array that is shared across the LZ77, LZW, and LZH decompression routines and is not reinitialized between files processed in the same invocation. By decompressing a specially crafted LZW file followed by a specially crafted LZH file in a single gzip -d command, an attacker can poison the shared global state and subsequently trigger an out‑of‑bounds read in the LZH decoder. The LZH decompression logic follows stale values left in the shared array, causing reads past the end of the allocated global buffer. This issue has been fixed in the commit 63dbf6b3b9e6e781df1a6a64e609b10e23969681

References

Affected packages

Ubuntu:18.04:LTS
gzip

Package

Name
gzip
Purl
pkg:deb/ubuntu/gzip?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.6-5ubuntu1
1.6-5ubuntu1.1
1.6-5ubuntu1.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gzip",
            "binary_version": "1.6-5ubuntu1.2"
        },
        {
            "binary_name": "gzip-win32",
            "binary_version": "1.6-5ubuntu1.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41992.json"
Ubuntu:20.04:LTS
gzip

Package

Name
gzip
Purl
pkg:deb/ubuntu/gzip?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*
1.10-0ubuntu3
1.10-0ubuntu4
1.10-0ubuntu4.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gzip",
            "binary_version": "1.10-0ubuntu4.1"
        },
        {
            "binary_name": "gzip-win32",
            "binary_version": "1.10-0ubuntu4.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41992.json"
Ubuntu:22.04:LTS
gzip

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.10-4ubuntu4.2

Affected versions

1.*
1.10-4ubuntu1
1.10-4ubuntu2
1.10-4ubuntu3
1.10-4ubuntu4
1.10-4ubuntu4.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gzip",
            "binary_version": "1.10-4ubuntu4.2"
        },
        {
            "binary_name": "gzip-win32",
            "binary_version": "1.10-4ubuntu4.2"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41992.json"
Ubuntu:24.04:LTS
gzip

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.12-1ubuntu3.2

Affected versions

1.*
1.12-1ubuntu1
1.12-1ubuntu2
1.12-1ubuntu3
1.12-1ubuntu3.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gzip",
            "binary_version": "1.12-1ubuntu3.2"
        },
        {
            "binary_name": "gzip-win32",
            "binary_version": "1.12-1ubuntu3.2"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41992.json"
Ubuntu:25.10
gzip

Package

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

Affected ranges

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

Affected versions

1.*
1.13-1ubuntu3
1.13-1ubuntu4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gzip",
            "binary_version": "1.13-1ubuntu4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41992.json"
Ubuntu:26.04:LTS
gzip

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.14-1~exp2ubuntu1.1

Affected versions

1.*
1.13-1ubuntu4
1.13-1ubuntu5
1.14-1~exp2ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gzip",
            "binary_version": "1.14-1~exp2ubuntu1.1"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41992.json"
Ubuntu:Pro:14.04:LTS
gzip

Package

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

Affected ranges

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

Affected versions

1.*
1.6-2ubuntu1
1.6-3ubuntu1
1.6-3ubuntu1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gzip",
            "binary_version": "1.6-3ubuntu1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41992.json"
Ubuntu:Pro:16.04:LTS
gzip

Package

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

Affected ranges

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

Affected versions

1.*
1.6-4ubuntu1
1.6-4ubuntu1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gzip",
            "binary_version": "1.6-4ubuntu1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41992.json"