USN-8229-2

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Source
https://ubuntu.com/security/notices/USN-8229-2
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8229-2.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8229-2
Upstream
Related
Published
2026-05-28T18:34:13Z
Modified
2026-05-29T10:59:19.228985104Z
Summary
sed vulnerability
Details

USN-8229-1 fixed a vulnerability in sed. This update provides the corresponding update for Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.

Original advisory 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:Pro:18.04:LTS / sed

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.4-2ubuntu0.1~esm1

Affected versions

4.*
4.4-1
4.4-2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "sed",
            "binary_version": "4.4-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V4",
                    "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"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-5958"
        }
    ],
    "ecosystem": "Ubuntu:Pro:18.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8229-2.json"

Ubuntu:Pro:20.04:LTS / sed

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.7-1ubuntu0.1~esm1

Affected versions

4.*
4.7-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "sed",
            "binary_version": "4.7-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "severity": [
                {
                    "type": "CVSS_V4",
                    "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"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2026-5958"
        }
    ],
    "ecosystem": "Ubuntu:Pro:20.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8229-2.json"