| 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-2024-43868: riscv/purgatory: align riscv_kernel_entry |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| riscv/purgatory: align riscv_kernel_entry |
| |
| When alignment handling is delegated to the kernel, everything must be |
| word-aligned in purgatory, since the trap handler is then set to the |
| kexec one. Without the alignment, hitting the exception would |
| ultimately crash. On other occasions, the kernel's handler would take |
| care of exceptions. |
| This has been tested on a JH7110 SoC with oreboot and its SBI delegating |
| unaligned access exceptions and the kernel configured to handle them. |
| |
| The Linux kernel CVE team has assigned CVE-2024-43868 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.19 with commit 736e30af583fb6e0e2b8211b894ff99dea0f1ee7 and fixed in 6.1.117 with commit 10ffafb456f293976c42f700578ef740467cb569 |
| Issue introduced in 5.19 with commit 736e30af583fb6e0e2b8211b894ff99dea0f1ee7 and fixed in 6.6.61 with commit 6e62dab357eea12db0fc62dea94c7a892888e6e8 |
| Issue introduced in 5.19 with commit 736e30af583fb6e0e2b8211b894ff99dea0f1ee7 and fixed in 6.10.4 with commit 5d4aaf16a8255f7c71790e211724ba029609c5ff |
| Issue introduced in 5.19 with commit 736e30af583fb6e0e2b8211b894ff99dea0f1ee7 and fixed in 6.11 with commit fb197c5d2fd24b9af3d4697d0cf778645846d6d5 |
| |
| 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-2024-43868 |
| 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: |
| arch/riscv/purgatory/entry.S |
| |
| |
| 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/10ffafb456f293976c42f700578ef740467cb569 |
| https://git.kernel.org/stable/c/6e62dab357eea12db0fc62dea94c7a892888e6e8 |
| https://git.kernel.org/stable/c/5d4aaf16a8255f7c71790e211724ba029609c5ff |
| https://git.kernel.org/stable/c/fb197c5d2fd24b9af3d4697d0cf778645846d6d5 |
