wifi: wcn36xx: fix OOB read from short trigger BA firmware response

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The firmware response length is only checked against sizeof(*rsp) (20
bytes), but when candidate_cnt >= 1, a 22-byte candidate struct is read
at buf + 20 without verifying the response contains it. This causes an
out-of-bounds read of stale heap data, corrupting the BA session state.

Add validation that the response includes the candidate data.

Fixes: 16be1ac559 ("wcn36xx: Parse trigger_ba response properly")
Signed-off-by: Tristan Madani <tristan@talencesecurity.com>
Reviewed-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
Link: https://patch.msgid.link/20260421135018.352774-4-tristmd@gmail.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>

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Tristan Madani 2026-04-21 13:50:18 +00:00 • committed by Jeff Johnson

parent df2187acfc

commit b5e6f21923

1 changed files with 3 additions and 0 deletions

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drivers/net/wireless/ath/wcn36xx/smd.c

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