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A vulnerability in the Linux kernel's SMC (Shared Memory Communications) subsystem was resolved, where re-initialization of smc hashtables could corrupt active hash entries. This flaw could lead to a corrupted list due to resetting hash tables that were already in use. The issue was fixed by removing the unnecessary re-initialization in the smc_init function. The vulnerability affects Linux Azure kernel versions prior to specific 7.0.0 builds. A patch is available and should be applied to mitigate the risk.

CVE-2026-64005 addresses a vulnerability in the Linux kernel's net/smc subsystem where the smc_v*_hashinfo.ht hash tables were re-initialized after being set up by smc_nl_init(), proto_register(), and sock_register(). This re-initialization could reset hash entries that were already in use, potentially corrupting the list structure. The fix involved removing the dangerous re-initialization in smc_init() since the hash tables are implicitly zero-initialized. This vulnerability affects Linux Azure kernel versions prior to several 7.0.0 builds as specified in the advisory. The issue has been patched in updated kernel versions.

Detailed information about In the Linux kernel, the following vulnerability has been resolved: net/smc: Do not re-initialize smc hashtables INIT_HLIST_HEAD(&smc

In the Linux kernel, the following vulnerability has been resolved: net/smc: Do not re-initialize smc hashtables INIT_HLIST_HEAD(&smc_v_hashinfo.ht)… (CVE-2026-64005) - Live Threat Intelligence - Threat Radar | OffSeq.com

Linux azure: In the Linux kernel, the following vulnerability has been resolved: net/smc: Do not re-initialize smc hashtables INIT_HLIST_HEAD(&smc_v_hashinfo.ht)… (CVE-2026-64005)

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