| 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-2021-47215: net/mlx5e: kTLS, Fix crash in RX resync flow |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net/mlx5e: kTLS, Fix crash in RX resync flow |
| |
| For the TLS RX resync flow, we maintain a list of TLS contexts |
| that require some attention, to communicate their resync information |
| to the HW. |
| Here we fix list corruptions, by protecting the entries against |
| movements coming from resync_handle_seq_match(), until their resync |
| handling in napi is fully completed. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47215 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.13 with commit e9ce991bce5bacf71641bd0f72f4b7c589529f40 and fixed in 5.15.5 with commit ebeda7a9528ae690e6bf12791a868f0cca8391f2 |
| Issue introduced in 5.13 with commit e9ce991bce5bacf71641bd0f72f4b7c589529f40 and fixed in 5.16 with commit cc4a9cc03faa6d8db1a6954bb536f2c1e63bdff6 |
| |
| 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-2021-47215 |
| 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/ethernet/mellanox/mlx5/core/en_accel/ktls_rx.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/ebeda7a9528ae690e6bf12791a868f0cca8391f2 |
| https://git.kernel.org/stable/c/cc4a9cc03faa6d8db1a6954bb536f2c1e63bdff6 |
