| 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-2024-41082: nvme-fabrics: use reserved tag for reg read/write command |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| nvme-fabrics: use reserved tag for reg read/write command |
| |
| In some scenarios, if too many commands are issued by nvme command in |
| the same time by user tasks, this may exhaust all tags of admin_q. If |
| a reset (nvme reset or IO timeout) occurs before these commands finish, |
| reconnect routine may fail to update nvme regs due to insufficient tags, |
| which will cause kernel hang forever. In order to workaround this issue, |
| maybe we can let reg_read32()/reg_read64()/reg_write32() use reserved |
| tags. This maybe safe for nvmf: |
| |
| 1. For the disable ctrl path, we will not issue connect command |
| 2. For the enable ctrl / fw activate path, since connect and reg_xx() |
| are called serially. |
| |
| So the reserved tags may still be enough while reg_xx() use reserved tags. |
| |
| The Linux kernel CVE team has assigned CVE-2024-41082 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.9.11 with commit 165da9c67a26f08c9b956c15d701da7690f45bcb |
| Fixed in 6.10 with commit 7dc3bfcb4c9cc58970fff6aaa48172cb224d85aa |
| |
| 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-2024-41082 |
| 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/nvme/host/fabrics.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/165da9c67a26f08c9b956c15d701da7690f45bcb |
| https://git.kernel.org/stable/c/7dc3bfcb4c9cc58970fff6aaa48172cb224d85aa |
