Dirtycow Patch - CVE-2016-5195#4
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Signed-off-by: Shawn Anastasio <[email protected]>
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Jun 8, 2026
…drop Pairs the d11 ucode kick (streams the full unprotected-DATA body into the host lbuf) with an ARM hook that clones the full frame to monitor BEFORE wlc_recvdata drops it. RE found the drop at 0x1a6cfc/0x1a6d00 (ldrh r3,[r6,flar2#4] RxStatus1; tst.w r3,#0x310; bne -> drop) which runs BEFORE the monitor dispatch at 0x1a6d20 -- the copy engine leaves RxStatus1 0x310 bits set so the streamed plaintext frame is dropped pre-monitor. HookPatch4 at 0x1a6cfc calls the firmware's own wlc_monitor(wlc,rxhdr,p,0) for monitor-mode DATA frames about to be dropped; p->len is already the full streamed length (set at 0x1a6caa from the lbuf), so wl_monitor_radiotap copies the whole frame. Original tst/bne still drops it from the normal host RX path (no bogus plaintext injected up the stack).
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Patches the Dirty Cow (CVE-2016-5195) privilege escalation kernel exploit for ElementalX-1.00.