| 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-2024-26705: parisc: BTLB: Fix crash when setting up BTLB at CPU bringup |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| parisc: BTLB: Fix crash when setting up BTLB at CPU bringup |
| |
| When using hotplug and bringing up a 32-bit CPU, ask the firmware about the |
| BTLB information to set up the static (block) TLB entries. |
| |
| For that write access to the static btlb_info struct is needed, but |
| since it is marked __ro_after_init the kernel segfaults with missing |
| write permissions. |
| |
| Fix the crash by dropping the __ro_after_init annotation. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26705 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.6 with commit e5ef93d02d6c9cc3a14e7348481c9e41a528caa1 and fixed in 6.6.18 with commit 54944f45470af5965fb9c28cf962ec30f38a8f5b |
| Issue introduced in 6.6 with commit e5ef93d02d6c9cc3a14e7348481c9e41a528caa1 and fixed in 6.7.6 with commit aa52be55276614d33f22fbe7da36c40d6432d10b |
| Issue introduced in 6.6 with commit e5ef93d02d6c9cc3a14e7348481c9e41a528caa1 and fixed in 6.8 with commit 913b9d443a0180cf0de3548f1ab3149378998486 |
| |
| 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-2024-26705 |
| 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/parisc/kernel/cache.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/54944f45470af5965fb9c28cf962ec30f38a8f5b |
| https://git.kernel.org/stable/c/aa52be55276614d33f22fbe7da36c40d6432d10b |
| https://git.kernel.org/stable/c/913b9d443a0180cf0de3548f1ab3149378998486 |
