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CVE-2026-76919 is an uninitialized-pointer flaw in Wireshark's generated ESS protocol dissector affecting versions 4.6.0 through 4.6.7 and 4.4.0 through 4.4.18. When decoding malformed BER BIT STRING values in ESS security-category attributes, a decoding failure path can leave the attribute buffer pointer uninitialized. ESS attribute-flag post-processing subsequently uses that indeterminate pointer as though it referenced a valid buffer, causing invalid native memory access. The affected attribute variants include restrictive, permissive, and free-form ESS security-category fields.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
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 the Wireshark ESS protocol dissector.
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 remotely exploitable, low-complexity vulnerability requiring no privileges or user interaction that affects availability only (CVSS v3: 7.5), according to the provided Unity Linux security-check metadata.
An unpatched vulnerability tracked as CVE-2026-76919, referenced by a Nessus plugin as affecting Debian Linux systems with Wireshark installed. The content only provides severity metadata and affected platform/package context, without technical flaw details.
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.