CVE-2026-31712
Description
A flaw was found in the ksmbd component of the Linux kernel. An authenticated Server Message Block (SMB) client with permissions to set an Access Control List (ACL) on a file can craft a malicious Discretionary Access Control List (DACL). This crafted DACL, containing an undersized Access Control Entry (ACE), can lead to an out-of-bounds read when the kernel processes it during a subsequent file creation operation. This vulnerability could result in kernel state corruption.
Understanding the Weakness (CWE)
Other,Integrity,Availability
Technical Impact: Varies by Context; DoS: Resource Consumption (CPU); Modify Memory; Read Memory
When the quantity is not properly validated, then attackers can specify malicious quantities to cause excessive resource allocation, trigger unexpected failures, enable buffer overflows, etc.
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