USN-8229-1

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Source
https://ubuntu.com/security/notices/USN-8229-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8229-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8229-1
Upstream
Related
Published
2026-05-04T12:24:18Z
Modified
2026-05-20T16:04:03.111048743Z
Summary
sed vulnerability
Details

Michał Majchrowicz and Marcin Wyczechowski discovered that sed incorrectly handled symbolic links when performing in-place edits. A local attacker could possibly use this issue to overwrite arbitrary files.

References

Affected packages

Ubuntu:22.04:LTS / sed

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.8-1ubuntu2.1

Affected versions

4.*
4.7-1ubuntu1
4.7-1ubuntu2
4.8-1ubuntu1
4.8-1ubuntu2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "4.8-1ubuntu2.1",
            "binary_name": "sed"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-5958",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8229-1.json"

Ubuntu:24.04:LTS / sed

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.9-2ubuntu0.24.04.1

Affected versions

4.*
4.9-1
4.9-2
4.9-2build1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "4.9-2ubuntu0.24.04.1",
            "binary_name": "sed"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-5958",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8229-1.json"

Ubuntu:25.10 / sed

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.9-2ubuntu0.25.10.1

Affected versions

4.*
4.9-2build1
4.9-2build2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "4.9-2ubuntu0.25.10.1",
            "binary_name": "sed"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-5958",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:25.10"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8229-1.json"

Ubuntu:26.04:LTS / sed

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.9-2ubuntu1

Affected versions

4.*
4.9-2build2
4.9-2build3

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "4.9-2ubuntu1",
            "binary_name": "sed"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-5958",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8229-1.json"