| 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-2022-49054: Drivers: hv: vmbus: Deactivate sysctl_record_panic_msg by default in isolated guests |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| Drivers: hv: vmbus: Deactivate sysctl_record_panic_msg by default in isolated guests |
| |
| hv_panic_page might contain guest-sensitive information, do not dump it |
| over to Hyper-V by default in isolated guests. |
| |
| While at it, update some comments in hyperv_{panic,die}_event(). |
| |
| The Linux kernel CVE team has assigned CVE-2022-49054 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.15.35 with commit 1b576e81d31b56b248316b8ff816b1cc5c4407c7 |
| Fixed in 5.17.4 with commit 6230bc50d6d21cae4c084766623d0a6d17958721 |
| Fixed in 5.18 with commit 9f8b577f7b43b2170628d6c537252785dcc2dcea |
| |
| 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-2022-49054 |
| 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/hv/vmbus_drv.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/1b576e81d31b56b248316b8ff816b1cc5c4407c7 |
| https://git.kernel.org/stable/c/6230bc50d6d21cae4c084766623d0a6d17958721 |
| https://git.kernel.org/stable/c/9f8b577f7b43b2170628d6c537252785dcc2dcea |
