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CVE-2026-76890 is a use-after-return flaw in Wireshark's sharkd backend. sharkd_session_process_iograph() stores iograph state in a stack-allocated array and registers entries as global tap listeners. When registration of a later graph fails, such as because of an invalid client-supplied filter or field, the error path returns without unregistering listeners created for earlier valid graphs. The retained listeners reference the expired stack frame. A subsequent retap invokes sharkd_iograph_packet() using the dangling state, causing invalid reads and potentially allocator operations on corrupted pointer data. The flaw causes a reliable sharkd crash and memory corruption. Published affected releases include Wireshark 4.6.0 through 4.6.7 and 4.4.0 through 4.4.18; technical reporting indicates the defect was introduced in 3.6.0 and may affect additional releases. tshark is not affected.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A denial-of-service crash in Wireshark's sharkd service.
A Wireshark vulnerability addressed by Debian DSA-6471; the advisory states the set of flaws could cause denial of service or arbitrary-code execution.
A vulnerability tracked as CVE-2026-76890 affecting Unity Linux / UOS Server packages. The supplied CVSS v3 vector is CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L, indicating low availability impact, high attack complexity, and required user interaction.
An unpatched vulnerability tracked as CVE-2026-76890, referenced in a Nessus plugin and associated with Debian Linux systems and the wireshark package.
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.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.