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CVE-2026-64382 is a double-free vulnerability in the Linux kernel SMB client code during SMB2_open() replay handling. The flaw occurs when a response-bearing attempt returns a replayable error and frees its response buffer, but a subsequent failure in SMB2_open_init() happens before the next send operation. In that state, cleanup can retain stale response bookkeeping, including the previous buffer type, and free the same response buffer a second time. The upstream fix resets response bookkeeping before each attempt to prevent the stale free condition.
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A Linux kernel SMB client double-free vulnerability in SMB2_open() replay handling, caused by stale response buffer bookkeeping that can lead to the same response being freed twice.
A specific vulnerability affecting Red Hat Enterprise Linux 10.2 kernel-related packages; the content does not provide technical details beyond listing it in the advisory.
A specific vulnerability affecting Red Hat Enterprise Linux 9 kernel-related packages, referenced in RHSA-2026:57252.
Linux kernel SMB client double-free vulnerability in SMB2_open() replay handling.
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.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.