| 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-2021-47306: net: fddi: fix UAF in fza_probe |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: fddi: fix UAF in fza_probe |
| |
| fp is netdev private data and it cannot be |
| used after free_netdev() call. Using fp after free_netdev() |
| can cause UAF bug. Fix it by moving free_netdev() after error message. |
| |
| TURBOchannel adapter") |
| |
| The Linux kernel CVE team has assigned CVE-2021-47306 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.20 with commit 61414f5ec9834df8aa4f55c90de16b71a3d6ca8d and fixed in 5.4.135 with commit 04b06716838bfc26742dbed3ae1d3697fe5317ee |
| Issue introduced in 4.20 with commit 61414f5ec9834df8aa4f55c90de16b71a3d6ca8d and fixed in 5.10.53 with commit f33605908a9b6063525e9f68e62d739948c5fccf |
| Issue introduced in 4.20 with commit 61414f5ec9834df8aa4f55c90de16b71a3d6ca8d and fixed in 5.13.5 with commit bdfbb51f7a437ae8ea91317a5c133ec13adf3c47 |
| Issue introduced in 4.20 with commit 61414f5ec9834df8aa4f55c90de16b71a3d6ca8d and fixed in 5.14 with commit deb7178eb940e2c5caca1b1db084a69b2e59b4c9 |
| |
| 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-2021-47306 |
| 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/fddi/defza.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/04b06716838bfc26742dbed3ae1d3697fe5317ee |
| https://git.kernel.org/stable/c/f33605908a9b6063525e9f68e62d739948c5fccf |
| https://git.kernel.org/stable/c/bdfbb51f7a437ae8ea91317a5c133ec13adf3c47 |
| https://git.kernel.org/stable/c/deb7178eb940e2c5caca1b1db084a69b2e59b4c9 |
