From 7209982d2a89f2e27d2f83f8952e9512be813aa4 Mon Sep 17 00:00:00 2001 From: Povilas Kanapickas Date: Wed, 15 Dec 2021 10:41:20 +0200 Subject: [PATCH] Xext: Fix out of bounds access in SProcScreenSaverSuspend() ZDI-CAN-14951, CVE-2021-4010 This vulnerability was discovered and the fix was suggested by: Jan-Niklas Sohn working with Trend Micro Zero Day Initiative Signed-off-by: Povilas Kanapickas (cherry picked from commit 6c4c53010772e3cb4cb8acd54950c8eec9c00d21) --- Xext/saver.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Xext/saver.c b/Xext/saver.c index 1d7e3cadf..f813ba08d 100644 --- a/Xext/saver.c +++ b/Xext/saver.c @@ -1351,8 +1351,8 @@ SProcScreenSaverSuspend(ClientPtr client) REQUEST(xScreenSaverSuspendReq); swaps(&stuff->length); - swapl(&stuff->suspend); REQUEST_SIZE_MATCH(xScreenSaverSuspendReq); + swapl(&stuff->suspend); return ProcScreenSaverSuspend(client); }