CVE-2026-41992: GNU gzip contains a global buffer overflow vulnerability in the LZH decompression logic caused by improper reu

Q: How do I fix CVE-2026-41992?

gzip: upgrade to newer than 1.14. Exact commands for each OS are on this page.

Q: Is CVE-2026-41992 being exploited?

CVE-2026-41992 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-41992 affect?

CVE-2026-41992 affects gzip. Severity is high (CVSS 7.5). 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 tha

Q: How urgent is CVE-2026-41992?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2026-41992 is a high-severity flaw (CVSS 7.5) affecting gzip. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 cr

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-126
Published	2026-06-29
Last modified	2026-10-25

Publisher (CNA): CERT.PL · Vendor: gnu

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-29 12:16 UTCPublished CVE record published
2026-10-25 21:10 UTCUpdated Record last modified

gnu gzip UPGRADE

Affected: <= 1.14

Fixed in: newer than 1.14

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy gzip || rpm -q gzip || gzip --version

2. UPGRADE to newer than 1.14 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade gzip

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gzip

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Advisories and coverage

Official advisories

CERT Polska: Vulnerabilities in gzip software 2026-06-29

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41992?

gzip: upgrade to newer than 1.14. Exact commands for each OS are on this page.

Is CVE-2026-41992 being exploited?

CVE-2026-41992 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41992 affect?

CVE-2026-41992 affects gzip. Severity is high (CVSS 7.5). 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 tha

How urgent is CVE-2026-41992?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-41991 MEDIUM 4.7 UPGRADE GNU gzip contains a vulnerability in the gzexe utility related to insecure temporary file handling

References

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