Bug 2351612 (CVE-2025-21844)

Summary: CVE-2025-21844 kernel: smb: client: Add check for next_buffer in receive_encrypted_standard()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-03-12 12:23:35 UTC 
In the Linux kernel, the following vulnerability has been resolved:

smb: client: Add check for next_buffer in receive_encrypted_standard()

Add check for the return value of cifs_buf_get() and cifs_small_buf_get()
in receive_encrypted_standard() to prevent null pointer dereference.
Comment 1 Mauro Matteo Cascella 2025-03-12 16:22:36 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025031210-CVE-2025-21844-a1cc@gregkh/T