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Linux Kernel (< 6.12.113, < 6.18.56, < 7.2.10)

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critical advisory

Linux Kernel cifs.ko: Heap Out-of-Bounds Write (CVE-2026-89633)

A heap out-of-bounds write vulnerability in the Linux kernel SMB1 client allows an attacker-controlled server to overwrite process credentials and escalate privileges to root.

Linux Kernel +1 kernel privilege-escalation smb1 cifs cwe-787
2t 2c