CVE-2026-41992
highpriority · track · 30EPSS 0.006 · 49 %ileCHDEEUFRUSEPSS · scored 2026-10-27
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.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
No fix is available; mitigate or reduce exposure.
- No fix availableLabX Standardmettler_toledo_psirt
This vulnerability will be fixed in the upcoming releases
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.6–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (17)
Products and version ranges known to be affected.
- Open Source Open Source gzip commit <63dbf6b3b9e6e781df1a6a64e609b10e23969681≤ commit <63dbf6b3b9e6e781df1a6a64e609b10e23969681cert_bundDE
- LabX Standardall versionsmettler_toledo_psirtCHcpe:2.3:a:mettler_toledo:labx_standard:21.4.25:*:*:*:*:*:*:*
advisories (4)
Vendor and ecosystem advisories describing this.
- VDE-2026-088METTLER TOLEDO: LabX Standard and Enterprise Report on External Component Analysis - v21.42026-08-20csaf · mettler_toledo_psirtCH
The vulnerabilities found in LabX Standard versions 21.3.22 - 21.4.23 are CVE-2025-69419, CVE-2026-0915, CVE-2025-15467, CVE-2026-4800, CVE-2026-33186, CVE-2026-39821, CVE-2026-33671 and are fixed in LabX Standard v21.4.25. The vulnerabilities found in LabX Enterprise versions 21.3.22 - 21.4.23 are CVE-2026-4800, CVE-2026-33186, CVE-2026-39821, CVE-2026-33671 and are fixed in LabX Enterprise v21.4.25 All other vulnerabilities are to be fixed in the upcoming releases.
- WID-SEC-W-2026-2126gzip: Mehrere SchwachstellenDeutsch2026-06-29csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen in gzip ausnutzen, um Dateien zu manipulieren und um vertrauliche Informationen offenzulegen.
- CERTFR-2026-AVI-1336Multiples vulnérabilités dans les produits IBMFrançais2026-10-16vendor · certfrFR
- CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (13)
External citations — patches, advisories, analysis.
- https://cert.pl/en/posts/2026/04/CVE-2026-41991/cnnvd
- https://cgit.git.savannah.gnu.org/cgit/gzip.git/commit/?id=63dbf6b3b9e6e781df1a6a64e609b10e23969681cnnvd
- https://www.gnu.org/software/gzip/cnnvd
- https://cert.pl/en/posts/2026/04/CVE-2026-41991/enisa_euvd
- https://cgit.git.savannah.gnu.org/cgit/gzip.git/commit/?id=63dbf6b3b9e6e781df1a6a64e609b10e23969681enisa_euvd
- https://www.gnu.org/software/gzip/enisa_euvd
- http://www.openwall.com/lists/oss-security/2026/08/23/1nvd
- http://www.openwall.com/lists/oss-security/2026/08/25/1nvd
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