From bippy-d175d3acf727 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman To: Reply-to: , Subject: CVE-2021-47404: HID: betop: fix slab-out-of-bounds Write in betop_probe Description =========== In the Linux kernel, the following vulnerability has been resolved: HID: betop: fix slab-out-of-bounds Write in betop_probe Syzbot reported slab-out-of-bounds Write bug in hid-betopff driver. The problem is the driver assumes the device must have an input report but some malicious devices violate this assumption. So this patch checks hid_device's input is non empty before it's been used. The Linux kernel CVE team has assigned CVE-2021-47404 to this issue. Affected and fixed versions =========================== Fixed in 4.4.286 with commit a4faa7153b87 Fixed in 4.9.285 with commit 6fc4476dda58 Fixed in 4.14.249 with commit 1c83c38dec83 Fixed in 4.19.209 with commit bb8b72374db6 Fixed in 5.4.151 with commit fe9bb925e709 Fixed in 5.10.71 with commit dedfc35a2de2 Fixed in 5.14.10 with commit 708107b80aa6 Fixed in 5.15 with commit 1e4ce418b1cb 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-2021-47404 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/hid/hid-betopff.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/a4faa7153b87fbcfe4be15f4278676f79ca6e019 https://git.kernel.org/stable/c/6fc4476dda58f6c00097c7ddec3b772513f57525 https://git.kernel.org/stable/c/1c83c38dec83d57bc18d0c01d82c413d3b34ccb9 https://git.kernel.org/stable/c/bb8b72374db69afa25a5b65cf1c092860c6fe914 https://git.kernel.org/stable/c/fe9bb925e7096509711660d39c0493a1546e9550 https://git.kernel.org/stable/c/dedfc35a2de2bae9fa3da8210a05bfd515f83fee https://git.kernel.org/stable/c/708107b80aa616976d1c5fa60ac0c1390749db5e https://git.kernel.org/stable/c/1e4ce418b1cb1a810256b5fb3fd33d22d1325993