| 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-2024-38614: openrisc: traps: Don't send signals to kernel mode threads |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| openrisc: traps: Don't send signals to kernel mode threads |
| |
| OpenRISC exception handling sends signals to user processes on floating |
| point exceptions and trap instructions (for debugging) among others. |
| There is a bug where the trap handling logic may send signals to kernel |
| threads, we should not send these signals to kernel threads, if that |
| happens we treat it as an error. |
| |
| This patch adds conditions to die if the kernel receives these |
| exceptions in kernel mode code. |
| |
| The Linux kernel CVE team has assigned CVE-2024-38614 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.4 with commit 27267655c5313ba0f5a3caa9ad35d887d9a12574 and fixed in 6.6.33 with commit c0ed9a711e3392d73e857faa031d8d349c0d70db |
| Issue introduced in 6.4 with commit 27267655c5313ba0f5a3caa9ad35d887d9a12574 and fixed in 6.8.12 with commit 075c0405b0d7d9fc490609e988a3af0069596538 |
| Issue introduced in 6.4 with commit 27267655c5313ba0f5a3caa9ad35d887d9a12574 and fixed in 6.9.3 with commit cea9d0015c140af39477dd5eeb9b20233a45daa9 |
| Issue introduced in 6.4 with commit 27267655c5313ba0f5a3caa9ad35d887d9a12574 and fixed in 6.10 with commit c88cfb5cea5f8f9868ef02cc9ce9183a26dcf20f |
| |
| 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-2024-38614 |
| 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/openrisc/kernel/traps.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/c0ed9a711e3392d73e857faa031d8d349c0d70db |
| https://git.kernel.org/stable/c/075c0405b0d7d9fc490609e988a3af0069596538 |
| https://git.kernel.org/stable/c/cea9d0015c140af39477dd5eeb9b20233a45daa9 |
| https://git.kernel.org/stable/c/c88cfb5cea5f8f9868ef02cc9ce9183a26dcf20f |
