| From bippy-1.0.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2021-47671: can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path |
| |
| In es58x_rx_err_msg(), if can->do_set_mode() fails, the function |
| directly returns without calling netif_rx(skb). This means that the |
| skb previously allocated by alloc_can_err_skb() is not freed. In other |
| terms, this is a memory leak. |
| |
| This patch simply removes the return statement in the error branch and |
| let the function continue. |
| |
| Issue was found with GCC -fanalyzer, please follow the link below for |
| details. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47671 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.13 with commit 8537257874e949a59c834cecfd5a063e11b64b0b and fixed in 5.14.19 with commit 4f389e1276a5389c92cef860c9fde8e1c802a871 |
| Issue introduced in 5.13 with commit 8537257874e949a59c834cecfd5a063e11b64b0b and fixed in 5.15.3 with commit 7eb0881aec26099089f12ae850aebd93190b1dfe |
| Issue introduced in 5.13 with commit 8537257874e949a59c834cecfd5a063e11b64b0b and fixed in 5.16 with commit d9447f768bc8c60623e4bb3ce65b8f4654d33a50 |
| |
| 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-2021-47671 |
| 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/net/can/usb/etas_es58x/es58x_core.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/4f389e1276a5389c92cef860c9fde8e1c802a871 |
| https://git.kernel.org/stable/c/7eb0881aec26099089f12ae850aebd93190b1dfe |
| https://git.kernel.org/stable/c/d9447f768bc8c60623e4bb3ce65b8f4654d33a50 |
