| 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-2024-46834: ethtool: fail closed if we can't get max channel used in indirection tables |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ethtool: fail closed if we can't get max channel used in indirection tables |
| |
| Commit 0d1b7d6c9274 ("bnxt: fix crashes when reducing ring count with |
| active RSS contexts") proves that allowing indirection table to contain |
| channels with out of bounds IDs may lead to crashes. Currently the |
| max channel check in the core gets skipped if driver can't fetch |
| the indirection table or when we can't allocate memory. |
| |
| Both of those conditions should be extremely rare but if they do |
| happen we should try to be safe and fail the channel change. |
| |
| The Linux kernel CVE team has assigned CVE-2024-46834 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.10.10 with commit 101737d8b88dbd4be6010bac398fe810f1950036 |
| Fixed in 6.11 with commit 2899d58462ba868287d6ff3acad3675e7adf934f |
| |
| 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-2024-46834 |
| 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: |
| net/ethtool/channels.c |
| net/ethtool/common.c |
| net/ethtool/common.h |
| net/ethtool/ioctl.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/101737d8b88dbd4be6010bac398fe810f1950036 |
| https://git.kernel.org/stable/c/2899d58462ba868287d6ff3acad3675e7adf934f |
