Bug 2422744 (CVE-2025-68255)

Summary: CVE-2025-68255 kernel: staging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-12-16 15:01:28 UTC 
In the Linux kernel, the following vulnerability has been resolved:

staging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing

The Supported Rates IE length from an incoming Association Request frame
was used directly as the memcpy() length when copying into a fixed-size
16-byte stack buffer (supportRate). A malicious station can advertise an
IE length larger than 16 bytes, causing a stack buffer overflow.

Clamp ie_len to the buffer size before copying the Supported Rates IE,
and correct the bounds check when merging Extended Supported Rates to
prevent a second potential overflow.

This prevents kernel stack corruption triggered by malformed association
requests.
Comment 1 Alexander B 2025-12-16 23:16:16 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121612-CVE-2025-68255-3994@gregkh/T