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CVE-2026-54874 is an asymmetric memory-consumption vulnerability in OpenSSL DTLS handshake processing. When a DTLS peer sends records claiming to belong to a future epoch before the local endpoint has completed its own epoch transition, OpenSSL buffers those records for later processing. Vulnerable versions retain the complete DTLS read buffer, sized at approximately 16 KB, for each buffered record rather than retaining only the record bytes. Up to 100 future-epoch records may be buffered per DTLS association, allowing small forged records to produce disproportionate memory retention. OpenSSL 4.0 before 4.0.2, 3.6 before 3.6.4, 3.5 before 3.5.8, 3.4 before 3.4.7, 3.0 before 3.0.22, 1.1.1 before 1.1.1zi, and 1.0.2 before 1.0.2zr are affected. The vulnerable code is outside the OpenSSL FIPS module boundary.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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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.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Low-severity asymmetric-resource-consumption flaw in OpenSSL DTLS handling. Forged records for a future epoch can produce roughly 1,200-fold memory amplification and exhaust endpoint memory.
A remotely exploitable, low-complexity OpenSSL vulnerability requiring no privileges or user interaction that affects availability only, with a high availability impact.
A low-severity OpenSSL DTLS memory-amplification denial-of-service vulnerability. Forged small future-epoch DTLS records cause disproportionately large buffered memory consumption, enabling remote memory exhaustion across multiple associations.
An OpenSSL vulnerability addressed by Debian DSA-6465-1; the advisory characterizes the grouped issues as potentially causing denial of service.
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.