CVE-2025-64118

node-tar vulnerable to race condition leading to uninitialized memory exposure

State: Published
Severity: 6.1 Medium
Published: Oct 30, 2025
Updated: Oct 30, 2025
Reserved: Oct 27, 2025

Description

node-tar is a Tar for Node.js. In 7.5.1, using .t (aka .list) with { sync: true } to read tar entry contents returns uninitialized memory contents if tar file was changed on disk to a smaller size while being read. This vulnerability is fixed in 7.5.2.

Scores

CVSS	Score	Vector	Source
4.0	6.1 Medium	CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:L/VA:L/SC:H/SI:H/SA:H	GitHub_M

Weaknesses

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

Affected Products

Product	Versions
node-tarisaacs	= 7.5.1Affected

References

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