CVE-2026-41992

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Source
https://cve.org/CVERecord?id=CVE-2026-41992
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41992.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-41992
Downstream
ALPINE (1)
AZL (1)
BELL (1)
DEBIAN (1)
ECHO (1)
JLSEC (1)
MGASA (1)
OESA (5)
openSUSE (2)
RHSA (5)
RLSA (3)
ROOT (3)
SUSE (6)
UBUNTU (1)
Related
ALSA (3)
openSUSE (2)
SUSE (6)
Published
2026-06-29T10:15:57Z
Modified
2026-10-21T10:48:28Z
Severity
  • 6.9 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
Global Buffer Overflow in GNU gzip
Details

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.

Database specific 
{
    "cna_assigner":  "CERT-PL",
    "cwe_ids":  [
        "CWE-126"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41992.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "last_affected":  "1.14"
                        }
                    ],
                    "source":  "AFFECTED_FIELD",
                    "strategy":  "StandardRange"
                }
            ]
        },
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "last_affected":  "1.14"
                        }
                    ],
                    "source":  "CPE_FIELD",
                    "strategy":  "CPEApplicability"
                }
            ]
        }
    ]
}
References

Affected packages

Git / cgit.git.savannah.gnu.org/cgit/gzip.git

Affected ranges

Type
GIT
Repo
https://cgit.git.savannah.gnu.org/cgit/gzip.git
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
63dbf6b3b9e6e781df1a6a64e609b10e23969681
Fixed
e7378c2d421be6a286922374425680bbe9ad8b7d
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "63dbf6b3b9e6e781df1a6a64e609b10e23969681"
                }
            ],
            "source":  "DESCRIPTION"
        },
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "last_affected":  "63dbf6b3b9e6e781df1a6a64e609b10e23969681"
                }
            ],
            "source":  "DESCRIPTION"
        },
        {
            "range":  [
                {
                    "fixed":  "63dbf6b3b9e6e781df1a6a64e609b10e23969681"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "range":  [
                {
                    "fixed":  "e7378c2d421be6a286922374425680bbe9ad8b7d"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41992.json"