CVE-2026-112935

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Source
https://cve.org/CVERecord?id=CVE-2026-112935
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112935.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-112935
Aliases
  • GHSA-fq56-3cx3-fjxp
Downstream
Published
2026-10-20T14:32:25Z
Modified
2026-10-22T02:47:54Z
Severity
  • 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
filelock: SoftFileLock stale-lock break removes a live lock file on a reused inode number and admits two holders
Details

filelock is a platform-independent file lock for Python. From 3.22.0 until 4.2.1, SoftFileLock can break a stale marker after an attacker frees its own marker following the stale read, an honest contender creates a live successor on the reused inode, and the successor's modification time is not newer than the saved observation, causing the live marker to be removed and two holders to be admitted. This issue is fixed in version 4.2.1.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-367"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112935.json"
}
References

Affected packages

Git / github.com/tox-dev/filelock

Affected ranges

Type
GIT
Repo
https://github.com/tox-dev/filelock
Events
Introduced
1dd2465cef7e5c189feaa16698a3ec3f33a653b0
Fixed
60331bb89f325020b48bc51bde904c6446384e4a
Fixed
740ff666b62a88496c8d7394e4e6230605e4d62b
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "3.22.0"
                },
                {
                    "fixed":  "4.2.1"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "740ff666b62a88496c8d7394e4e6230605e4d62b"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "4.2.1",
            "range":  [
                {
                    "fixed":  "60331bb89f325020b48bc51bde904c6446384e4a"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

3.*
3.22.0
3.23.0
3.24.0
3.24.1
3.24.2
3.24.3
3.24.4
3.25.0
3.25.1
3.25.2
3.26.0
3.26.1
3.27.0
3.28.0
3.29.0
3.29.1
3.29.2
3.29.3
3.29.4
3.29.5
3.29.6
3.29.7
3.30.0
3.30.1
3.30.2
3.30.3
3.31.0
3.31.1
3.31.2
3.32.0
3.32.1
3.32.2
3.32.3
3.32.4
3.32.5
3.32.6
3.32.7
4.*
4.0.0
4.0.1
4.0.10
4.0.11
4.0.12
4.0.2
4.0.3
4.0.4
4.0.5
4.0.6
4.0.7
4.0.8
4.0.9
4.1.0
4.1.1
4.1.2
4.2.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112935.json"