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DEBIAN-CVE-2026-103436

Type: advisorySource: OSV1 source record

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.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-103436

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-103436

apcupsd

Source reference: /affected/0/package/name

Affected versions
3.14.14-3.1

Source reference: /affected/0/versions

3.14.14-4

Source reference: /affected/0/versions

3.14.14-5

Source reference: /affected/0/versions

3.14.14-6

Source reference: /affected/0/versions

3.14.14-7

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

apcupsd

Source reference: /affected/1/package/name

Affected versions
3.14.14-5

Source reference: /affected/1/versions

3.14.14-6

Source reference: /affected/1/versions

3.14.14-7

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

apcupsd

Source reference: /affected/2/package/name

Affected versions
3.14.14-5

Source reference: /affected/2/versions

3.14.14-6

Source reference: /affected/2/versions

3.14.14-7

Source reference: /affected/2/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "apcupsd",
      "purl": "pkg:deb/debian/apcupsd?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "3.14.14-3.1",
      "3.14.14-4",
      "3.14.14-5",
      "3.14.14-6",
      "3.14.14-7"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-103436.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "apcupsd",
      "purl": "pkg:deb/debian/apcupsd?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "3.14.14-5",
      "3.14.14-6",
      "3.14.14-7"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-103436.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "apcupsd",
      "purl": "pkg:deb/debian/apcupsd?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "3.14.14-5",
      "3.14.14-6",
      "3.14.14-7"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-103436.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]
Related CVEs
CVE-2026-103436

Source reference: /upstream

Publisher severity

low

Source reference: /severity/0/score

Linked CVE context

These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.

CVE-2026-103436 · Low

apcupsd

Event
#72964 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement