Incorrect Bitwise Shift of Integer Affecting libarchive package, versions [0,]
Threat Intelligence
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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- published25 Mar 2026
- disclosed19 Mar 2026
- creditUnknown
Introduced: 19 Mar 2026
NewCVE-2026-4426 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Incorrect Bitwise Shift of Integer in the zisofs decompression process due to improper validation of the pz_log2_bs field from ISO9660 Rock Ridge extensions. An attacker can cause application crashes and service disruption by supplying a specially crafted ISO file.
Workaround
This vulnerability can be mitigated by avoiding the processing of untrusted ISO9660 images and restricting the sources of ISO files to trusted entities.