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A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression logic, caused by improper validation of a field (`pz_log2_bs`) read from ISO9660 Rock Ridge extensions. A remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect memory allocation and potential application crashes, resulting in a denial-of-service (DoS) condition.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade libarchive | May 6, 2026 | May 6, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Mar 19, 2026 |
| Suse | — | Upgrade bsdtarUpgrade libarchive13Upgrade libarchive-devel | Jun 1, 2026 | May 25, 2026 |
| Ubuntu | — | Upgrade libarchive-dev (Ubuntu Pro)Upgrade libarchive-toolsUpgrade libarchive13t64Upgrade libarchive13Upgrade libarchive13 (Ubuntu Pro)Upgrade bsdtar (Ubuntu Pro)Upgrade libarchive-tools (Ubuntu Pro)Upgrade libarchive-devUpgrade bsdcpio (Ubuntu Pro) | May 25, 2026 | May 21, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Mar 19, 2026 |
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