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Cwe-787

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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 kernel privilege-escalation smb1 cifs cwe-787
1t 1c