Linux vulnerability

What happened

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) are called after smc_nl_init(), proto_register() and sock_register(). This can lead to smc_v*_hashinfo.ht being reset even though hash entries already exist and are being used, possibly resulting in a corrupted list. Remove unnecessary and dangerous re-initialisation of smc_v*_hashinfo.ht in smc_init(); it is implicitly initialised to zero anyhow. Add HLIST_HEAD_INIT to the definitions for clarity.

Affected versions

Linux: f16a7dd5cf27eeda187425c9c7d96802a549f9c4 through before cdc79c05cc375f68ae87b0c74fdaac1a5c93155a (git); f16a7dd5cf27eeda187425c9c7d96802a549f9c4 through before 2006605006e5a4a11d93e1ebdbbe95764d24276f (git); f16a7dd5cf27eeda187425c9c7d96802a549f9c4 through before 64c96e497d5ada0b90e99bf58f893aa2b73dcfbc (git); f16a7dd5cf27eeda187425c9c7d96802a549f9c4 through before ed7a758313011885347b854e97cb95903ef3c3f7 (git); f16a7dd5cf27eeda187425c9c7d96802a549f9c4 through before 0cc9d0ac22d02f1ba1884de5d6de9eaf8b45d82d (git); f16a7dd5cf27eeda187425c9c7d96802a549f9c4 through before 55cba6b883b41e5922c00ba9d4e3262131f46f1b (git); f16a7dd5cf27eeda187425c9c7d96802a549f9c4 through before 5ec939367e700722ffbb1b7cacccbb1a3cf0ebd1 (git); f16a7dd5cf27eeda187425c9c7d96802a549f9c4 through before 9e4389b0038781f19f97895186ed941ff8ac1678 (git); 4.11 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.