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CVE-2023-26464 is a denial-of-service vulnerability in end-of-life Apache Log4j 1.x. When Chainsaw or SocketAppender deserializes an attacker-influenced logging event containing a specially crafted, deeply nested HashMap or Hashtable, Java versions earlier than 1.7 can consume excessive JVM heap memory. The resulting memory exhaustion can destabilize or terminate the affected application or JVM.
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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.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A denial-of-service vulnerability in Log4j 1 Chainsaw and SocketAppender caused by hashmap logging.
A denial-of-service vulnerability in Log4j 1 Chainsaw and SocketAppender caused by hashmap logging.
A denial-of-service vulnerability in Log4j 1 Chainsaw and SocketAppender caused by HashMap logging.
A denial-of-service vulnerability in Log4j 1 Chainsaw and SocketAppender caused by hashmap logging.
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.