Upstream information
Description
Sereal::Decoder versions before 5.005 for Perl allow heap out-of-bounds read via crafted input.In Perl/Decoder/srl_decoder.c, srl_read_object() and srl_read_hash() process a COPY tag, a back-reference whose target byte the decoder re-decodes as a fresh tag. When that target byte matches the SHORT_BINARY pattern (an inline string whose length is encoded in the low bits of the tag), the resulting read is not bounded to precede the COPY tag's own offset and can run past the end of the input buffer. An attacker controlled COPY offset can land inside a previously decoded value rather than on a tag boundary, planting a byte that the decoder reads as a SHORT_BINARY tag and consuming up to 31 following bytes from the heap as a class name (OBJECT path) or hash key (HASH path).
SUSE information
Overall state of this security issue: Does not affect SUSE products
This issue is currently rated as having moderate severity.
SUSE Bugzilla entry: 1267015 [NEW] No SUSE Security Announcements cross referenced.SUSE Timeline for this CVE
CVE page created: Mon Jun 1 00:07:24 2026CVE page last modified: Mon Jun 1 11:23:40 2026