What’s Vulnerable › Vulnerabilities

CVE-2026-98174: smb: client: fix rlist race and missing initialization

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-06 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix rlist race and missing initialization TCP_Server_Info.rlist is allocated via kzalloc which zeros both ->next and ->prev to NULL instead of pointing to itself, making list_empty() always return false and list_add() dereference a NULL ->prev pointer. Also, cifs_signal_cifsd_for_reconnect() can be called concurrently from multiple cifsd threads, allowing the same server's rlist node to be added twice into the local list, corrupting it.

Affected products

• Linux kernel: before 6.6.158; before 6.12.112; before 6.18.54; before 7.2.8 — fixed in 6.12.112, 6.18.54, 6.6.158, 7.2.8, 7.3

How to fix

Upgrade to a fixed version: Linux kernel 6.12.112, 6.18.54, 6.6.158, 7.2.8. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/04082b1833856cb9ed87e0d3d5f04cbf836cf7da
• https://git.kernel.org/stable/c/5a8f82f9c5839389cf4036029dd75a9911049e83
• https://git.kernel.org/stable/c/5f270f091256da1338c3631083e15d7f83cc05e1
• https://git.kernel.org/stable/c/b5f924ffbfa976e4b97f17e8132c595b97482c2d
• https://git.kernel.org/stable/c/c037d6bde3dd5fa00b017b6b98a5389ec0ebc02f

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