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Change History

In the Linux kernel, the following vulnerability has been resolved:

staging: rtl8723bs: fix out-of-bounds read in OnBeacon ESR IE parsing

The Extended Supported Rates (ESR) IE handling in OnBeacon accessed
*(p + 1 + ielen) and *(p + 2 + ielen) without verifying that these
offsets lie within the received frame buffer. A malformed beacon with
an ESR IE positioned at the end of the buffer could cause an
out-of-bounds read, potentially triggering a kernel panic.

Add a boundary check to ensure that the ESR IE body and the subsequent
bytes are within the limits of the frame before attempting to access
them.

This prevents OOB reads caused by malformed beacon frames.

https://git.kernel.org/stable/c/38292407c2bb5b2b3131aaace4ecc7a829b40b76

https://git.kernel.org/stable/c/502ddcc405b69fa92e0add6c1714d654504f6fd7

https://git.kernel.org/stable/c/bf323db1d883c209880bd92f3b12503e3531c3fc

https://git.kernel.org/stable/c/d1ab7f9cee22e7b8a528da9ac953e4193b96cda5