A double free issue has been identified in libarchives RAR5 reader. During parsing of a specially crafted RAR5 archive, the filtered_buf pointer may remain stale after being freed during unpacking state reinitialization. Subsequent processing of another archive entry can trigger a second free of the same memory region, resulting in a double-free condition. Successful exploitation may cause applications using the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service.
Weakness
The product calls free() twice on the same memory address.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Red Hat Hardened Images | RedHat | libarchive-main-3.8.8-2.hum1 | * |
Potential Mitigations
References
- https://access.redhat.com/errata/RHSA-2026:30333
- https://access.redhat.com/security/cve/CVE-2026-14164
- https://bugzilla.redhat.com/show_bug.cgi?id=2493411
- https://github.com/libarchive/libarchive/issues/3069
- https://github.com/libarchive/libarchive/pull/3071
- https://github.com/libarchive/libarchive/issues/3069