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CVE-2026-112935Published

filelock: SoftFileLock stale-lock break removes a live lock file on a reused inode number and admits two holders

Exact source revision recorded 28 Oct 2026 15:46:50 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

cve-program · CVE-2026-112935

Published

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.

Source published
20 Oct 2026 14:32:25 UTC
Source modified
28 Oct 2026 14:17:06 UTC
Observed here
28 Oct 2026 15:46:50 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 3.1 · 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

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Sources read 31 Oct 05:32 UTC · 272 of 272 readable · 270 fully read · documentation 469/469 current

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