| 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-2022-49162: video: fbdev: sm712fb: Fix crash in smtcfb_write() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| video: fbdev: sm712fb: Fix crash in smtcfb_write() |
| |
| When the sm712fb driver writes three bytes to the framebuffer, the |
| driver will crash: |
| |
| BUG: unable to handle page fault for address: ffffc90001ffffff |
| RIP: 0010:smtcfb_write+0x454/0x5b0 |
| Call Trace: |
| vfs_write+0x291/0xd60 |
| ? do_sys_openat2+0x27d/0x350 |
| ? __fget_light+0x54/0x340 |
| ksys_write+0xce/0x190 |
| do_syscall_64+0x43/0x90 |
| entry_SYSCALL_64_after_hwframe+0x44/0xae |
| |
| Fix it by removing the open-coded endianness fixup-code. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49162 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.9.311 with commit fb791514acf9070225eed46e1ccbb0aa7aae5da5 |
| Fixed in 4.14.276 with commit 0ec746674296c94137f074309c26d17e644c0498 |
| Fixed in 4.19.238 with commit 1aea36a62f0a0ad67eccc945bac0bd6422ef720f |
| Fixed in 5.4.189 with commit 3b36c05f68ba32d0dfb63abc9016d6fe9117829f |
| Fixed in 5.10.110 with commit b1c28577529cdfad40c8242673285f1e1e4c314e |
| Fixed in 5.15.33 with commit eae90015d10f0c9a47fc4adccba4cd79dce664e4 |
| Fixed in 5.16.19 with commit aeb635b49530b7d19e140949753409f759ba99be |
| Fixed in 5.17.2 with commit 809b8cde86320698661eec677222bc5c5df76176 |
| Fixed in 5.18 with commit 4f01d09b2bbfbcb47b3eb305560a7f4857a32260 |
| |
| 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-2022-49162 |
| 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/video/fbdev/sm712fb.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/fb791514acf9070225eed46e1ccbb0aa7aae5da5 |
| https://git.kernel.org/stable/c/0ec746674296c94137f074309c26d17e644c0498 |
| https://git.kernel.org/stable/c/1aea36a62f0a0ad67eccc945bac0bd6422ef720f |
| https://git.kernel.org/stable/c/3b36c05f68ba32d0dfb63abc9016d6fe9117829f |
| https://git.kernel.org/stable/c/b1c28577529cdfad40c8242673285f1e1e4c314e |
| https://git.kernel.org/stable/c/eae90015d10f0c9a47fc4adccba4cd79dce664e4 |
| https://git.kernel.org/stable/c/aeb635b49530b7d19e140949753409f759ba99be |
| https://git.kernel.org/stable/c/809b8cde86320698661eec677222bc5c5df76176 |
| https://git.kernel.org/stable/c/4f01d09b2bbfbcb47b3eb305560a7f4857a32260 |
