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CVE-2026-84782 is an out-of-bounds read in OpenSSL DTLS handshake retransmission handling. During a fragmented handshake-message write that has suspended with WANT_WRITE because the transport cannot accept further output, a retransmission timer can initiate retransmission of a queued message. The vulnerable logic reuses shared buffer-position state from the suspended write without resetting the retransmitted message's read offset. This can cause retransmission to send data from an incorrect position, read beyond the allocated message buffer, and corrupt bookkeeping required to resume the suspended write. The affected code is outside the OpenSSL FIPS module boundary.
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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.
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
High-severity OpenSSL DTLS memory-disclosure and denial-of-service vulnerability. Under a partial DTLS handshake-message send and retransmission timing condition, incorrect buffer handling can transmit unencrypted heap data or cause an out-of-bounds read and application crash.
A high-severity OpenSSL DTLS retransmission-state flaw that can expose heap-memory contents as unencrypted handshake data to a remote peer or cause an out-of-bounds read and denial-of-service crash.
A high-severity OpenSSL DTLS handshake flaw that can disclose leftover heap memory in plaintext to a remote peer or cause an application denial of service through a crash. It has a CVSS score of 8.2 and is network-exploitable without authentication or user interaction.
A high-severity OpenSSL DTLS handshake retransmission vulnerability that can disclose adjacent heap memory in plaintext to a connected peer and potentially cause denial of service through a process crash.
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.