| 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-2022-48804: vt_ioctl: fix array_index_nospec in vt_setactivate |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| vt_ioctl: fix array_index_nospec in vt_setactivate |
| |
| array_index_nospec ensures that an out-of-bounds value is set to zero |
| on the transient path. Decreasing the value by one afterwards causes |
| a transient integer underflow. vsa.console should be decreased first |
| and then sanitized with array_index_nospec. |
| |
| Kasper Acknowledgements: Jakob Koschel, Brian Johannesmeyer, Kaveh |
| Razavi, Herbert Bos, Cristiano Giuffrida from the VUSec group at VU |
| Amsterdam. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48804 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.9.302 with commit 830c5aa302ec16b4ee641aec769462c37f802c90 |
| Fixed in 4.14.267 with commit 2a45a6bd1e6d651770aafff57ab3e1d3bb0b42e0 |
| Fixed in 4.19.230 with commit 170325aba4608bde3e7d21c9c19b7bc266ac0885 |
| Fixed in 5.4.180 with commit ae3d57411562260ee3f4fd5e875f410002341104 |
| Fixed in 5.10.101 with commit 778302ca09498b448620edd372dc908bebf80bdf |
| Fixed in 5.15.24 with commit ffe54289b02e9c732d6f04c8ebbe3b2d90d32118 |
| Fixed in 5.16.10 with commit 6550bdf52846f85a2a3726a5aa0c7c4399f2fc02 |
| Fixed in 5.17 with commit 61cc70d9e8ef5b042d4ed87994d20100ec8896d9 |
| |
| 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-2022-48804 |
| 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/tty/vt/vt_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/830c5aa302ec16b4ee641aec769462c37f802c90 |
| https://git.kernel.org/stable/c/2a45a6bd1e6d651770aafff57ab3e1d3bb0b42e0 |
| https://git.kernel.org/stable/c/170325aba4608bde3e7d21c9c19b7bc266ac0885 |
| https://git.kernel.org/stable/c/ae3d57411562260ee3f4fd5e875f410002341104 |
| https://git.kernel.org/stable/c/778302ca09498b448620edd372dc908bebf80bdf |
| https://git.kernel.org/stable/c/ffe54289b02e9c732d6f04c8ebbe3b2d90d32118 |
| https://git.kernel.org/stable/c/6550bdf52846f85a2a3726a5aa0c7c4399f2fc02 |
| https://git.kernel.org/stable/c/61cc70d9e8ef5b042d4ed87994d20100ec8896d9 |
