A double free issue has been identified in libarchive's 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.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 1
- First seenCVSS 7.5NVD modified 2026-10-14 20:17
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 56
- https://access.redhat.com/errata/RHSA-2026:30333
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- 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