CVE-2026-8829: Perl Xs Svpv Alias Uaf
A string buffer pointer is extracted via `SvPV` from a hash value fetched using `hv_fetch`. If this hash value is self-aliased with an SV that gets reallocated (e.g., via `SvGROW`), the cached pointer will point to freed memory, causing a use-after-free. Ensure you check for self-aliasing between the fetched SV and the target SV before caching the pointer.
Cgreprules fetch cve-2026-8829-perl-xs-svpv-alias-uaf --engine opengrepDescription
A string buffer pointer is extracted via `SvPV` from a hash value fetched using `hv_fetch`. If this hash value is self-aliased with an SV that gets reallocated (e.g., via `SvGROW`), the cached pointer will point to freed memory, causing a use-after-free. Ensure you check for self-aliasing between the fetched SV and the target SV before caching the pointer.
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