From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 36E073EF653 for ; Fri, 8 May 2026 14:24:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778250241; cv=none; b=lu/YiS8veVP9bcVlWQf2lj1AzjrlXY3JScJk1wxQYPPRIPXb16ufV5zsoVPTtsa/esfw3Ari/Oh0FzOohVUsoLWXx4PSnYi8BhaDrMRn30BthOwsuxwMBAEqjayFaBvhySLfl4Bw9wF14FqtgsN5mDXewnaRRCTwJHV5bDV4Qyw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778250241; c=relaxed/simple; bh=SBLYOa8GRWcaIl1bTuJ2enUtmXkUUWl76fotjkmCq9Q=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Jdh+ZSEUXkRAWfTTNhGMryonLJPEEDqQRWK4yfXlxAEJ4QRGws/Sz6hCmDwwkICzhPANwobWXvMH+iHRCGd3hS/XKRgIEqDvmdzVqWurPqx60VUjrh+Kybt8Jj+dv1Q7kHI7Z8/xvii4gfmZwijXw1kZ/dEb1hIaJiysAb5i8Aw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=t24SPJVb; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="t24SPJVb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C3D21C2BCB0; Fri, 8 May 2026 14:24:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778250241; bh=SBLYOa8GRWcaIl1bTuJ2enUtmXkUUWl76fotjkmCq9Q=; h=From:To:Cc:Subject:Date:Reply-To:From; b=t24SPJVbUNpDSdK57/Z0+dttVoEBZv3U1DRqbBznX8gFsC28D77mLUvI/MIxby+6K WtN7PrvXiW2L6cSYtV+i6/49lDpA2nuDnG/F0QU0v3xb25bZC6FJyvLewFEmFW0loB C3I6nczgEEMs10uG0q4zT1jTzYakv3XmT+4anhtE= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2026-43400: drm/amdgpu: add upper bound check on user inputs in signal ioctl Date: Fri, 8 May 2026 16:22:09 +0200 Message-ID: <2026050839-CVE-2026-43400-3a71@gregkh> X-Mailer: git-send-email 2.54.0 Reply-To: , Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2084; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=T/53AlwU8cebCwA6O7zrNbrEwHkrz+vTAwUdAXyOvv8=; b=owGbwMvMwCRo6H6F97bub03G02pJDJl/P5ZMKshovHD0tum80jWmd44e2nHnrveyK9Gti5/56 jWeEqt264hlYRBkYpAVU2T5so3n6P6KQ4pehranYeawMoEMYeDiFICJ3DrOMFfuX+K+cwu/B0VF ZvYcZvNYpPrZPpVhfom4p3zHxI8vrfMzfBOtvyybc3PaPwA= X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit From: Greg Kroah-Hartman Description =========== In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: add upper bound check on user inputs in signal ioctl Huge input values in amdgpu_userq_signal_ioctl can lead to a OOM and could be exploited. So check these input value against AMDGPU_USERQ_MAX_HANDLES which is big enough value for genuine use cases and could potentially avoid OOM. (cherry picked from commit be267e15f99bc97cbe202cd556717797cdcf79a5) The Linux kernel CVE team has assigned CVE-2026-43400 to this issue. Affected and fixed versions =========================== Fixed in 6.18.19 with commit 6fff5204d8aa26b1be50b6427f833bd3e8899c4f Fixed in 6.19.9 with commit 46630d966b99b0fc6cb01fef4110587f3375a0c0 Fixed in 7.0 with commit ea78f8c68f4f6211c557df49174c54d167821962 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-43400 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/6fff5204d8aa26b1be50b6427f833bd3e8899c4f https://git.kernel.org/stable/c/46630d966b99b0fc6cb01fef4110587f3375a0c0 https://git.kernel.org/stable/c/ea78f8c68f4f6211c557df49174c54d167821962