Use of Uninitialized Resource Affecting 7-zip package, versions [9.18,26.01)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-7ZIP-17192446
- published5 Jun 2026
- disclosed5 Jun 2026
- creditJaroslav Lobačevski
Introduced: 5 Jun 2026
CVE-2026-48104 (opens in a new tab)How to fix?
Upgrade 7-zip to version 26.01 or higher.
Overview
Affected versions of this package are vulnerable to Use of Uninitialized Resource in the SquashFS archive handler due to uninitialized memory in the _blockToNode array. An attacker can cause denial of service or potentially disclose heap information by providing a crafted SquashFS image that manipulates the RootInode superblock field to trigger out-of-bounds reads during directory parsing. This is only exploitable if the SquashFS handler is enabled and a malicious archive is opened.