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CVE-2025-31115 is a use-after-free vulnerability in the multithreaded .xz decoder in liblzma, affecting XZ Utils versions 5.3.3alpha through 5.8.0. A worker thread can free its input buffer after decoding while the main thread is still writing to that buffer. Malformed .xz input can trigger heap use-after-free behavior and a write to an address derived from a null pointer plus an offset. Applications and libraries invoking lzma_stream_decoder_mt are affected.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A network-reachable vulnerability with low attack complexity and no required privileges or user interaction that can cause high availability impact (denial of service).
A vulnerability identified as CVE-2025-31115, described as an XZ Utils vulnerability impacting B&R/ABB products, addressed by ABB in affected product versions prior to the listed fixed releases.
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.