CVE-2026-41992
Fixed in a distro release EPSS <1%CVSS 6.9
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.
Products: gnu gzip
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | gzip | 1.13-4.el10_2 |
| AlmaLinux 8 | gzip | 1.9-15.el8_10 |
| AlmaLinux 9 | gzip | 1.12-2.el9_8 |
| Alpine 3.21 | gzip | 1.13-r1 |
| Alpine 3.22 | gzip | 1.14-r2 |
| Alpine 3.23 | gzip | 1.14-r3 |
| Alpine 3.24 | gzip | 1.14-r3 |
| Debian 12 | gzip | no fix |
| Debian 13 | gzip | 1.13-1+deb13u1 |
| Debian 14 | gzip | 1.14-1 |
| Red Hat Enterprise Linux 10.2 | gzip | 0:1.13-4.el10_2 |
| Red Hat Enterprise Linux 10.2 | gzip-debuginfo | 0:1.13-4.el10_2 |
| Red Hat Enterprise Linux 10.2 | gzip-debugsource | 0:1.13-4.el10_2 |
| Red Hat Enterprise Linux 8 | gzip | 0:1.9-15.el8_10 |
| Red Hat Enterprise Linux 8 | gzip-debuginfo | 0:1.9-15.el8_10 |
| Red Hat Enterprise Linux 8 | gzip-debugsource | 0:1.9-15.el8_10 |
| Red Hat Enterprise Linux 9 | gzip | 0:1.12-2.el9_8 |
| Red Hat Enterprise Linux 9 | gzip-debuginfo | 0:1.12-2.el9_8 |
| Red Hat Enterprise Linux 9 | gzip-debugsource | 0:1.12-2.el9_8 |
| Red Hat hummingbird 1 | gzip | 0:1.14-2.3.hum1 |
| Red Hat hummingbird 1 | gzip | 0:1.15-1.hum1 |
| Rocky Linux 10 | gzip | 0:1.13-4.el10_2 |
| Rocky Linux 8 | gzip | 0:1.9-15.el8_10 |
| Rocky Linux 9 | gzip | 0:1.12-2.el9_8 |
| SUSE Linux Enterprise Micro 5.3 | gzip | 1.10-150200.16.1 |
| SUSE Linux Enterprise Micro 5.4 | gzip | 1.10-150200.16.1 |
| SUSE Linux Enterprise Micro 5.5 | gzip | 1.10-150200.16.1 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | gzip | 1.10-150200.16.1 |
| SUSE Linux Enterprise Server 16.0 | gzip | 1.13-160000.4.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | gzip | 1.10-4.20.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | gzip | 1.13-160000.4.1 |
| SUSE Linux Micro 6.0 | gzip | 1.13-3.1 |
| SUSE Linux Micro 6.1 | gzip | 1.13-slfo.1.1_4.1 |
| SUSE Linux Micro 6.2 | gzip | 1.13-160000.4.1 |
| Ubuntu 22.04 LTS | gzip | 1.10-4ubuntu4.2 |
| Ubuntu 24.04 LTS | gzip | 1.12-1ubuntu3.2 |
| Ubuntu 25.10 | gzip | no fix |
| Ubuntu 26.04 LTS | gzip | 1.14-1~exp2ubuntu1.1 |
| Ubuntu Pro 14.04 LTS | gzip | 1.6-3ubuntu1+esm2 |
| Ubuntu Pro 16.04 LTS | gzip | 1.6-4ubuntu1+esm2 |
| Ubuntu Pro 18.04 LTS | gzip | 1.6-5ubuntu1.2+esm1 |
| Ubuntu Pro 20.04 LTS | gzip | 1.10-0ubuntu4.1+esm1 |
| openSUSE Leap 16.0 | gzip | 1.13-160000.4.1 |
| openSUSE Tumbleweed | gzip | 1.14-3.1 |