| 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-2022-49122: dm ioctl: prevent potential spectre v1 gadget |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| dm ioctl: prevent potential spectre v1 gadget |
| |
| It appears like cmd could be a Spectre v1 gadget as it's supplied by a |
| user and used as an array index. Prevent the contents of kernel memory |
| from being leaked to userspace via speculative execution by using |
| array_index_nospec. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49122 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.9.311 with commit 76c94651005f58885facf9c973007f5ea01ab01f |
| Fixed in 4.14.276 with commit 58880025e3362024f6d8ea01cb0c7a5df6c84ba6 |
| Fixed in 4.19.238 with commit 7ae2c5b89da3cfaf856df880af27d3bb32a74b3d |
| Fixed in 5.4.189 with commit 0320bac5801b31407200227173205d017488f140 |
| Fixed in 5.10.111 with commit 71c8df33fd777c7628f6fbc09b14e84806c55914 |
| Fixed in 5.15.34 with commit 02cc46f397eb3691c56affbd5073e54f7a82ac32 |
| Fixed in 5.16.20 with commit 44e6cb3ab177faae840bb2c1ebda9a2539876184 |
| Fixed in 5.17.3 with commit dd86064417de828ff2102ddc6049c829bf7585b4 |
| Fixed in 5.18 with commit cd9c88da171a62c4b0f1c70e50c75845969fbc18 |
| |
| 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-2022-49122 |
| 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/md/dm-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/76c94651005f58885facf9c973007f5ea01ab01f |
| https://git.kernel.org/stable/c/58880025e3362024f6d8ea01cb0c7a5df6c84ba6 |
| https://git.kernel.org/stable/c/7ae2c5b89da3cfaf856df880af27d3bb32a74b3d |
| https://git.kernel.org/stable/c/0320bac5801b31407200227173205d017488f140 |
| https://git.kernel.org/stable/c/71c8df33fd777c7628f6fbc09b14e84806c55914 |
| https://git.kernel.org/stable/c/02cc46f397eb3691c56affbd5073e54f7a82ac32 |
| https://git.kernel.org/stable/c/44e6cb3ab177faae840bb2c1ebda9a2539876184 |
| https://git.kernel.org/stable/c/dd86064417de828ff2102ddc6049c829bf7585b4 |
| https://git.kernel.org/stable/c/cd9c88da171a62c4b0f1c70e50c75845969fbc18 |
