USN-8496-2

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Source
https://ubuntu.com/security/notices/USN-8496-2
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8496-2.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8496-2
Related
Published
2026-07-03T18:49:32Z
Modified
2026-07-04T02:00:06.067223032Z
Summary
cifs-utils regression
Details

USN-8496-1 fixed a vulnerability in cifs-utils. Unfortunately, the fix introduced a regression with Kerberos mounts. This update reverts the security update until a complete fix is available.

We apologize for the inconvenience.

Original advisory details:

It was discovered that cifs-utils incorrectly dropped root privileges before looking up user information. A local attacker could possibly use this issue to execute arbitrary code as the root user.

References

Affected packages

Ubuntu:22.04:LTS / cifs-utils

Package

Name
cifs-utils
Purl
pkg:deb/ubuntu/cifs-utils?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:6.14-1ubuntu0.5

Affected versions

2:6.*
2:6.11-3.1
2:6.14-1
2:6.14-1build1
2:6.14-1ubuntu0.1
2:6.14-1ubuntu0.2
2:6.14-1ubuntu0.3
2:6.14-1ubuntu0.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "cifs-utils",
            "binary_version": "2:6.14-1ubuntu0.5"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [],
    "ecosystem": "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8496-2.json"

Ubuntu:24.04:LTS / cifs-utils

Package

Name
cifs-utils
Purl
pkg:deb/ubuntu/cifs-utils?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:7.0-2ubuntu0.4

Affected versions

2:7.*
2:7.0-2
2:7.0-2build1
2:7.0-2ubuntu0.1
2:7.0-2ubuntu0.2
2:7.0-2ubuntu0.3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "cifs-utils",
            "binary_version": "2:7.0-2ubuntu0.4"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [],
    "ecosystem": "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8496-2.json"

Ubuntu:25.10 / cifs-utils

Package

Name
cifs-utils
Purl
pkg:deb/ubuntu/cifs-utils?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:7.4-1ubuntu0.25.10.2

Affected versions

2:7.*
2:7.2-2
2:7.3-1
2:7.4-1
2:7.4-1ubuntu0.25.10.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "cifs-utils",
            "binary_version": "2:7.4-1ubuntu0.25.10.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8496-2.json"
cves_map 
{
    "cves": [],
    "ecosystem": "Ubuntu:25.10"
}

Ubuntu:26.04:LTS / cifs-utils

Package

Name
cifs-utils
Purl
pkg:deb/ubuntu/cifs-utils?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:7.4-1ubuntu0.26.04.2

Affected versions

2:7.*
2:7.4-1
2:7.4-1build1
2:7.4-1ubuntu0.26.04.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "cifs-utils",
            "binary_version": "2:7.4-1ubuntu0.26.04.2"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [],
    "ecosystem": "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8496-2.json"