DEBIAN-CVE-2026-41992
GNU gzip contains a global buffer overflow vulnerability in the LZH decompression logic caused by improper reuse of shared global state between different decompression formats within a single execution. GNU gzip maintains a global array that is shared across the LZ77, LZW, and LZH decompression routines and is not reinitialized between files processed in the same invocation. By decompressing a specially crafted LZW file followed by a specially crafted LZH file in a single gzip -d command, an attacker can poison the shared global state and subsequently trigger an out‑of‑bounds read in the LZH decoder. The LZH decompression logic follows stale values left in the shared array, causing reads past the end of the allocated global buffer. This issue has been fixed in commits 63dbf6b3b9e6e781df1a6a64e609b10e23969681 and e7378c2d421be6a286922374425680bbe9ad8b7d.
DEBIAN-CVE-2026-41992
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-2026-41992
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-2026-41992.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-2026-41992.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-2026-41992.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56079 · Revision 1
- Added to Heist Feed
- Publisher date