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CVE-2026-5653 is a heap-based buffer overflow in the DCP-ETSI PFT protocol dissector in Wireshark, affecting versions 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14. The flaw is in the Reed-Solomon forward error correction processing path during fragment reassembly. The vulnerable logic allocates a heap buffer sized to the fragment count multiplied by payload length, while the Reed-Solomon decoder operates on fixed 255-byte blocks. Under crafted conditions, including malformed DCP-ETSI PFT fragments with FEC enabled, this size mismatch can cause writes past the end of the allocated heap buffer. The issue can be triggered when Wireshark processes malformed network traffic or opens a crafted packet capture containing such traffic, resulting in a crash.
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No public exploit code observed for this vulnerability.
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9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Referenced as part of the Wireshark 4.6.8 advisory/plugin CVE list, but not described individually in the content.
A Wireshark DCP-ETSI dissector vulnerability that can cause an application crash when processing malformed traffic.
A heap-based buffer overflow in the Wireshark DCP-ETSI protocol dissector that can cause a denial of service.
A Wireshark DCP-ETSI protocol dissector crash vulnerability that can cause Wireshark to crash when processing a malformed packet or malformed packet trace file.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.