CVE-2026-41991

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Source
https://cve.org/CVERecord?id=CVE-2026-41991
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41991.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-41991
Downstream
ALPINE (1)
ALSA (3)
BELL (1)
CLSA (2)
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
2026-06-29T10:15:50Z
Modified
2026-11-08T02:30:45Z
Severity
  • 2.0 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Predictable Temporary File in GNU gzip
Details

GNU gzip contains a vulnerability in the gzexe utility related to insecure temporary file handling. When the mktemp utility is not available in the user’s PATH, gzexe falls back to constructing a temporary file path based solely on the process ID (PID). This predictable filename is created without exclusive access or existence checks. A local attacker can pre‑create the predicted temporary file path as a symbolic link pointing to an arbitrary file writable by the victim. When gzexe runs, it follows the symlink and overwrites the target file, resulting in a time‑of‑check to time‑of‑use (TOCTOU) condition that allows arbitrary file overwrite.

This issue has been fixed in the commit 4e6f8b24ab823146ab8776f0b7fe486ab34d4269

Database specific 
{
    "cna_assigner": "CERT-PL",
    "cwe_ids": [
        "CWE-377"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41991.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "last_affected": "1.14"
                        }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                }
            ]
        }
    ]
}
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
4e6f8b24ab823146ab8776f0b7fe486ab34d4269
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "fixed": "4e6f8b24ab823146ab8776f0b7fe486ab34d4269"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41991.json"