| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2021-47270: usb: fix various gadgets null ptr deref on 10gbps cabling. |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| usb: fix various gadgets null ptr deref on 10gbps cabling. |
| |
| This avoids a null pointer dereference in |
| f_{ecm,eem,hid,loopback,printer,rndis,serial,sourcesink,subset,tcm} |
| by simply reusing the 5gbps config for 10gbps. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47270 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.6 with commit eaef50c760576bca70b87fdc26eb87a3660529f8 and fixed in 4.9.273 with commit beb1e67a5ca8d69703c776db9000527f44c0c93c |
| Issue introduced in 4.6 with commit eaef50c760576bca70b87fdc26eb87a3660529f8 and fixed in 4.14.237 with commit 8cd5f45c1b769e3e9e0f4325dd08b6c3749dc7ee |
| Issue introduced in 4.6 with commit eaef50c760576bca70b87fdc26eb87a3660529f8 and fixed in 4.19.195 with commit 10770d2ac0094b053c8897d96d7b2737cd72f7c5 |
| Issue introduced in 4.6 with commit eaef50c760576bca70b87fdc26eb87a3660529f8 and fixed in 5.4.126 with commit b4903f7fdc484628d0b8022daf86e2439d3ab4db |
| Issue introduced in 4.6 with commit eaef50c760576bca70b87fdc26eb87a3660529f8 and fixed in 5.10.44 with commit 4b289a0f3033f465b4fd51ba995251a7867a2aa2 |
| Issue introduced in 4.6 with commit eaef50c760576bca70b87fdc26eb87a3660529f8 and fixed in 5.12.11 with commit f17aae7c4009160f0630a91842a281773976a5bc |
| Issue introduced in 4.6 with commit eaef50c760576bca70b87fdc26eb87a3660529f8 and fixed in 5.13 with commit 90c4d05780d47e14a50e11a7f17373104cd47d25 |
| |
| 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-2021-47270 |
| 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/usb/gadget/function/f_ecm.c |
| drivers/usb/gadget/function/f_eem.c |
| drivers/usb/gadget/function/f_hid.c |
| drivers/usb/gadget/function/f_loopback.c |
| drivers/usb/gadget/function/f_printer.c |
| drivers/usb/gadget/function/f_rndis.c |
| drivers/usb/gadget/function/f_serial.c |
| drivers/usb/gadget/function/f_sourcesink.c |
| drivers/usb/gadget/function/f_subset.c |
| drivers/usb/gadget/function/f_tcm.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/beb1e67a5ca8d69703c776db9000527f44c0c93c |
| https://git.kernel.org/stable/c/8cd5f45c1b769e3e9e0f4325dd08b6c3749dc7ee |
| https://git.kernel.org/stable/c/10770d2ac0094b053c8897d96d7b2737cd72f7c5 |
| https://git.kernel.org/stable/c/b4903f7fdc484628d0b8022daf86e2439d3ab4db |
| https://git.kernel.org/stable/c/4b289a0f3033f465b4fd51ba995251a7867a2aa2 |
| https://git.kernel.org/stable/c/f17aae7c4009160f0630a91842a281773976a5bc |
| https://git.kernel.org/stable/c/90c4d05780d47e14a50e11a7f17373104cd47d25 |
