CVE catalog
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 executio
- Severity
- Medium · CVSS 6.9
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.62% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | gzip | sid | 1.14-1 | fixed |
| Debian | gzip | forky | 1.14-1 | fixed |
| Debian | gzip | trixie | 1.13-1+deb13u1 | fixed |
| Debian | gzip | bookworm | 1.12-1 | vulnerable |
| Cpe | gzip | Not reported | 1.12-1ubuntu3.2 | fixed |
| Cpe | gzip-win32 | Not reported | 1.12-1ubuntu3.2 | fixed |
| Cpe | gzip | Not reported | Not reported | vulnerable |
| Cpe | gzip | Not reported | Not reported | unknown |
| Cpe | gzip | Not reported | Not reported | unknown |
| Alpine | gzip | 3.21 | 1.13-r1 | fixed |
| Alpine | gzip | 3.22 | 1.14-r2 | fixed |
| Alpine | gzip | 3.23 | 1.14-r3 | fixed |
| Alpine | gzip | 3.24 | 1.14-r3 | fixed |
| Suse | gzip | linux enterprise server 16.0 | 1.13-160000.4.1 | fixed |
| Suse | gzip | linux enterprise server for sap applications 16.0 | 1.13-160000.4.1 | fixed |
| Ubuntu | gzip | pro | 1.10-0ubuntu3 | vulnerable |
| Ubuntu | gzip | pro | 1.10-0ubuntu4 | vulnerable |
| Ubuntu | gzip | pro | 1.10-0ubuntu4.1 | vulnerable |
| Ubuntu | gzip | pro | 1.10-0ubuntu4.1+esm1 | fixed |
| Ubuntu | gzip | 22.04 | 1.10-4ubuntu1 | vulnerable |
| Ubuntu | gzip | 22.04 | 1.10-4ubuntu2 | vulnerable |
| Ubuntu | gzip | 22.04 | 1.10-4ubuntu3 | vulnerable |
| Ubuntu | gzip | 22.04 | 1.10-4ubuntu4 | vulnerable |
| Ubuntu | gzip | 22.04 | 1.10-4ubuntu4.1 | vulnerable |
| Ubuntu | gzip | 22.04 | 1.10-4ubuntu4.2 | fixed |
| Ubuntu | gzip | 24.04 | 1.12-1ubuntu1 | vulnerable |
| Ubuntu | gzip | 24.04 | 1.12-1ubuntu2 | vulnerable |
| Ubuntu | gzip | 24.04 | 1.12-1ubuntu3 | vulnerable |
| Ubuntu | gzip | 24.04 | 1.12-1ubuntu3.1 | vulnerable |
| Ubuntu | gzip | 24.04 | 1.12-1ubuntu3.2 | fixed |
| Ubuntu | gzip | 25.10 | 1.13-1ubuntu3 | vulnerable |
| Ubuntu | gzip | 25.10 | 1.13-1ubuntu4 | vulnerable |
| Ubuntu | gzip | 26.04 | 1.13-1ubuntu4 | vulnerable |
| Ubuntu | gzip | 26.04 | 1.13-1ubuntu5 | vulnerable |
| Ubuntu | gzip | 26.04 | 1.14-1~exp2ubuntu1 | vulnerable |
| Ubuntu | gzip | 26.04 | 1.14-1~exp2ubuntu1.1 | fixed |
| Suse | gzip | linux micro 6.2 | 1.13-160000.4.1 | fixed |
| Suse | gzip | linux micro 6.0 | 1.13-3.1 | fixed |
| Suse | gzip | linux micro 6.1 | 1.13-slfo.1.1_4.1 | fixed |
| Opensuse | gzip | leap 16.0 | 1.13-160000.4.1 | fixed |
| Opensuse | gzip | tumbleweed | 1.14-3.1 | fixed |
| Suse | gzip | linux enterprise micro 5.3 | 1.10-150200.16.1 | fixed |
| Suse | gzip | linux enterprise micro 5.4 | 1.10-150200.16.1 | fixed |
| Suse | gzip | linux enterprise micro 5.5 | 1.10-150200.16.1 | fixed |
| Suse | gzip | linux enterprise module for basesystem 15 sp7 | 1.10-150200.16.1 | fixed |
| Suse | gzip | linux enterprise server ltss extended security 12 sp5 | 1.10-4.20.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | gzip | source | sid | 1.14-1 | not yet assigned | Not reported | [1141443] |
| Debian | gzip | source | forky | 1.14-1 | not yet assigned | Not reported | [1141443] |
| Debian | gzip | source | trixie | 1.13-1+deb13u1 | not yet assigned | Not reported | [1141443] |
| Debian | gzip | source | bookworm | (unfixed) | not yet assigned | Not reported | [1141443] |
| Cpe | gzip | cpe | Not reported | 1.12-1ubuntu3.2 | Not reported | Not reported | Not reported |
| Cpe | gzip-win32 | cpe | Not reported | 1.12-1ubuntu3.2 | Not reported | Not reported | Not reported |
| Alpine | gzip | apk | 3.21 | 1.13-r1 | Not reported | ALPINE-CVE-2026-41992 | Not reported |
| Alpine | gzip | apk | 3.22 | 1.14-r2 | Not reported | ALPINE-CVE-2026-41992 | Not reported |
| Alpine | gzip | apk | 3.23 | 1.14-r3 | Not reported | ALPINE-CVE-2026-41992 | Not reported |
| Alpine | gzip | apk | 3.24 | 1.14-r3 | Not reported | ALPINE-CVE-2026-41992 | Not reported |
| Suse | gzip | rpm | linux enterprise server 16.0 | 1.13-160000.4.1 | Not reported | SUSE-SU-2026:23550-1 | Not reported |
| Suse | gzip | rpm | linux enterprise server for sap applications 16.0 | 1.13-160000.4.1 | Not reported | SUSE-SU-2026:23550-1 | Not reported |
| Ubuntu | gzip | deb | pro | 1.10-0ubuntu4.1+esm1 | Not reported | UBUNTU-CVE-2026-41992 | Not reported |
| Ubuntu | gzip | deb | 22.04 | 1.10-4ubuntu4.2 | Not reported | UBUNTU-CVE-2026-41992 | Not reported |
| Ubuntu | gzip | deb | 24.04 | 1.12-1ubuntu3.2 | Not reported | UBUNTU-CVE-2026-41992 | Not reported |
| Ubuntu | gzip | deb | 26.04 | 1.14-1~exp2ubuntu1.1 | Not reported | UBUNTU-CVE-2026-41992 | Not reported |
| Suse | gzip | rpm | linux micro 6.2 | 1.13-160000.4.1 | Not reported | SUSE-SU-2026:23392-1 | Not reported |
| Suse | gzip | rpm | linux micro 6.0 | 1.13-3.1 | Not reported | SUSE-SU-2026:23363-1 | Not reported |
| Suse | gzip | rpm | linux micro 6.1 | 1.13-slfo.1.1_4.1 | Not reported | SUSE-SU-2026:23356-1 | Not reported |
| Opensuse | gzip | rpm | leap 16.0 | 1.13-160000.4.1 | Not reported | OPENSUSE-SU-2026:21666-1 | Not reported |
| Opensuse | gzip | rpm | tumbleweed | 1.14-3.1 | Not reported | OPENSUSE-SU-2026:11518-1 | Not reported |
| Suse | gzip | rpm | linux enterprise micro 5.3 | 1.10-150200.16.1 | Not reported | SUSE-SU-2026:3592-1 | Not reported |
| Suse | gzip | rpm | linux enterprise micro 5.4 | 1.10-150200.16.1 | Not reported | SUSE-SU-2026:3592-1 | Not reported |
| Suse | gzip | rpm | linux enterprise micro 5.5 | 1.10-150200.16.1 | Not reported | SUSE-SU-2026:3592-1 | Not reported |
| Suse | gzip | rpm | linux enterprise module for basesystem 15 sp7 | 1.10-150200.16.1 | Not reported | SUSE-SU-2026:3592-1 | Not reported |
| Suse | gzip | rpm | linux enterprise server ltss extended security 12 sp5 | 1.10-4.20.1 | Not reported | SUSE-SU-2026:3590-1 | Not reported |
Notes
[bookworm] gzip: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [gzip]Affected
Details (2)
1.12-1· amd64 · bookwormAffected
nvd · gzip · debian · bookworm; nvd · gzip · debian · 12
1.12-1· arm64 · bookwormAffected
nvd · gzip · debian · bookworm; nvd · gzip · debian · 12
- [gzip-win32]Affected
Source package: [gzip]
Details (2)
1.12-1· all · bookwormAffected
nvd · gzip · debian · bookworm; nvd · gzip · debian · 12
1.12-1· all · bookwormAffected
nvd · gzip · debian · bookworm; nvd · gzip · debian · 12
[Debian 13 (Trixie)]
- [gzip]Affected
Details (2)
1.13-1· amd64 · trixieAffected · Fixed:
1.13-1+deb13u1nvd · gzip · debian · 13
1.13-1· arm64 · trixieAffected · Fixed:
1.13-1+deb13u1nvd · gzip · debian · 13
[openSUSE Tumbleweed]
Observed:
References
- [http://www.openwall.com/lists/oss-security/2026/08/23/1]
- [http://www.openwall.com/lists/oss-security/2026/08/25/1]
- [http://www.openwall.com/lists/oss-security/2026/08/27/2]
- [https://cert.pl/en/posts/2026/04/CVE-2026-41991/]
- [https://cgit.git.savannah.gnu.org/cgit/gzip.git/commit/?id=63dbf6b3b9e6e781df1a6a64e609b10e23969681]
- [https://cgit.git.savannah.gnu.org/cgit/gzip.git/commit/?id=e7378c2d421be6a286922374425680bbe9ad8b7d]
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_3590-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-41992]
- [https://osv.dev/vulnerability/ALPINE-CVE-2026-41992]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-41992]
- [https://osv.dev/vulnerability/SUSE-SU-2026:23356-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:23363-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:23392-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:23550-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3590-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3592-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-41992]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11518-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:21666-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-41992]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41992.json]
- [https://ubuntu.com/security/notices/USN-8512-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2126.json]
- [https://www.gnu.org/software/gzip/]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]