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CVE-2023-52775 is a race and timeout-handling flaw in the Linux kernel's net/smc subsystem affecting SMC-R connection setup and fallback processing. When an LLC confirm fails, the client and server can time out and send SMC DECLINE messages at overlapping times. A DECLINE message can subsequently be read by an already-established fallback TCP connection as application payload, causing SMC protocol control data to be delivered to the application and corrupting the application data stream. The upstream fix doubles the client-side timeout relative to the server timeout so that DECLINE messages do not cross or collide during confirm-link timeout handling.
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No public exploit code observed for this vulnerability.
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3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel SMC networking data-corruption issue.
A Linux kernel net/smc flaw that can cause data corruption when an SMC connection is declined. The issue is rated medium severity by Red Hat.
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.