DEBIAN-CVE-2026-41991
GNU gzip contains a vulnerability in the gzexe utility related to insecure temporary file handling. When the mktemp utility is not available in the user’s PATH, gzexe falls back to constructing a temporary file path based solely on the process ID (PID). This predictable filename is created without exclusive access or existence checks. A local attacker can pre‑create the predicted temporary file path as a symbolic link pointing to an arbitrary file writable by the victim. When gzexe runs, it follows the symlink and overwrites the target file, resulting in a time‑of‑check to time‑of‑use (TOCTOU) condition that allows arbitrary file overwrite. This issue has been fixed in the commit 4e6f8b24ab823146ab8776f0b7fe486ab34d4269
DEBIAN-CVE-2026-41991
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-2026-41991
gzip
Source reference: /affected/0/package/name
- Affected versions
- 1.12-1
Source reference:
/affected/0/versions1.12-1.1Source reference:
/affected/0/versions1.12-1.2Source reference:
/affected/0/versions1.13-1Source reference:
/affected/0/versions1.13.56~e549-1~exp1Source reference:
/affected/0/versions1.14-1Source reference:
/affected/0/versions1.14-1~exp1Source reference:
/affected/0/versions1.14-1~exp2Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
gzip
Source reference: /affected/1/package/name
- Affected versions
- 1.13-1
Source reference:
/affected/1/versions - Fixed versions
- 1.13-1+deb13u1
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
gzip
Source reference: /affected/2/package/name
- Affected versions
- 1.13-1
Source reference:
/affected/2/versions1.13.56~e549-1~exp1Source reference:
/affected/2/versions1.14-1~exp1Source reference:
/affected/2/versions1.14-1~exp2Source reference:
/affected/2/versions - Fixed versions
- 1.14-1
Source reference:
/affected/2/ranges - 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": "gzip",
"purl": "pkg:deb/debian/gzip?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"1.12-1",
"1.12-1.1",
"1.12-1.2",
"1.13-1",
"1.13.56~e549-1~exp1",
"1.14-1",
"1.14-1~exp1",
"1.14-1~exp2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-41991.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.13-1+deb13u1"
}
]
}
],
"package": {
"name": "gzip",
"purl": "pkg:deb/debian/gzip?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"1.13-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-41991.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.14-1"
}
]
}
],
"package": {
"name": "gzip",
"purl": "pkg:deb/debian/gzip?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.13-1",
"1.13.56~e549-1~exp1",
"1.14-1~exp1",
"1.14-1~exp2"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-41991.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56081 · Revision 1
- Added to Heist Feed
- Publisher date