| 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-2024-46822: arm64: acpi: Harden get_cpu_for_acpi_id() against missing CPU entry |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| arm64: acpi: Harden get_cpu_for_acpi_id() against missing CPU entry |
| |
| In a review discussion of the changes to support vCPU hotplug where |
| a check was added on the GICC being enabled if was online, it was |
| noted that there is need to map back to the cpu and use that to index |
| into a cpumask. As such, a valid ID is needed. |
| |
| If an MPIDR check fails in acpi_map_gic_cpu_interface() it is possible |
| for the entry in cpu_madt_gicc[cpu] == NULL. This function would |
| then cause a NULL pointer dereference. Whilst a path to trigger |
| this has not been established, harden this caller against the |
| possibility. |
| |
| The Linux kernel CVE team has assigned CVE-2024-46822 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.4.284 with commit f57769ff6fa7f97f1296965f20e8a2bb3ee9fd0f |
| Fixed in 5.10.226 with commit 4c3b21204abb4fa3ab310fbbb5cf7f0e85f3a1bc |
| Fixed in 5.15.167 with commit 945be49f4e832a9184c313fdf8917475438a795b |
| Fixed in 6.1.110 with commit 40cae0df42e5e7f7a1c0f32deed9c4027c1ba94e |
| Fixed in 6.6.51 with commit 62ca6d3a905b4c40cd942f3cc645a6718f8bc7e7 |
| Fixed in 6.10.10 with commit bc7fbb37e3d2df59336eadbd6a56be632e3c7df7 |
| Fixed in 6.11 with commit 2488444274c70038eb6b686cba5f1ce48ebb9cdd |
| |
| 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-2024-46822 |
| 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/arm64/include/asm/acpi.h |
| |
| |
| 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/f57769ff6fa7f97f1296965f20e8a2bb3ee9fd0f |
| https://git.kernel.org/stable/c/4c3b21204abb4fa3ab310fbbb5cf7f0e85f3a1bc |
| https://git.kernel.org/stable/c/945be49f4e832a9184c313fdf8917475438a795b |
| https://git.kernel.org/stable/c/40cae0df42e5e7f7a1c0f32deed9c4027c1ba94e |
| https://git.kernel.org/stable/c/62ca6d3a905b4c40cd942f3cc645a6718f8bc7e7 |
| https://git.kernel.org/stable/c/bc7fbb37e3d2df59336eadbd6a56be632e3c7df7 |
| https://git.kernel.org/stable/c/2488444274c70038eb6b686cba5f1ce48ebb9cdd |
