UBUNTU-CVE-2026-103436

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Source
https://ubuntu.com/security/CVE-2026-103436
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103436.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-103436
Upstream
Published
2026-10-02T00:00:00Z
Modified
2026-10-02T22:30:17Z
Severity
  • 3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

apcupsd through 3.14.14 discloses uninitialized stack memory in getupsvar() in src/cgi/upsfetch.c (used by upsstats.cgi, multimon.cgi, and upsfstats.cgi. On the single-field path, when the matched STATUS line has fewer than three whitespace-separated tokens, sscanf("%*s %*s %s", answer) performs no assignment but the function returns success, and thus the caller prints the uninitialized destination buffer into the HTTP response.

References

Affected packages

Ubuntu:16.04:LTS
apcupsd

Package

Name
apcupsd
Purl
pkg:deb/ubuntu/apcupsd?arch=source&distro=xenial

Affected ranges

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

Affected versions

3.*
3.14.12-1.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "apcupsd",
            "binary_version":  "3.14.12-1.1"
        },
        {
            "binary_name":  "apcupsd-cgi",
            "binary_version":  "3.14.12-1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103436.json"
Ubuntu:18.04:LTS
apcupsd

Package

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

Affected ranges

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

Affected versions

3.*
3.14.14-0.3
3.14.14-1
3.14.14-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "apcupsd",
            "binary_version":  "3.14.14-2"
        },
        {
            "binary_name":  "apcupsd-cgi",
            "binary_version":  "3.14.14-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103436.json"
Ubuntu:20.04:LTS
apcupsd

Package

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

Affected ranges

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

Affected versions

3.*
3.14.14-3
3.14.14-3build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "apcupsd",
            "binary_version":  "3.14.14-3build1"
        },
        {
            "binary_name":  "apcupsd-cgi",
            "binary_version":  "3.14.14-3build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103436.json"
Ubuntu:22.04:LTS
apcupsd

Package

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

Affected ranges

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

Affected versions

3.*
3.14.14-3.1
3.14.14-3.1build1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "apcupsd",
            "binary_version":  "3.14.14-3.1build1"
        },
        {
            "binary_name":  "apcupsd-cgi",
            "binary_version":  "3.14.14-3.1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103436.json"
Ubuntu:24.04:LTS
apcupsd

Package

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

Affected ranges

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

Affected versions

3.*
3.14.14-3.1build1
3.14.14-3.1build2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "apcupsd",
            "binary_version":  "3.14.14-3.1build2"
        },
        {
            "binary_name":  "apcupsd-cgi",
            "binary_version":  "3.14.14-3.1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103436.json"
Ubuntu:26.04:LTS
apcupsd

Package

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

Affected ranges

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

Affected versions

3.*
3.14.14-5
3.14.14-6
3.14.14-7

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "apcupsd",
            "binary_version":  "3.14.14-7"
        },
        {
            "binary_name":  "apcupsd-cgi",
            "binary_version":  "3.14.14-7"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-103436.json"