| 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-2024-51729: mm: use aligned address in copy_user_gigantic_page() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| mm: use aligned address in copy_user_gigantic_page() |
| |
| In current kernel, hugetlb_wp() calls copy_user_large_folio() with the |
| fault address. Where the fault address may be not aligned with the huge |
| page size. Then, copy_user_large_folio() may call |
| copy_user_gigantic_page() with the address, while |
| copy_user_gigantic_page() requires the address to be huge page size |
| aligned. So, this may cause memory corruption or information leak, |
| addtional, use more obvious naming 'addr_hint' instead of 'addr' for |
| copy_user_gigantic_page(). |
| |
| The Linux kernel CVE team has assigned CVE-2024-51729 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.11 with commit 530dd9926dc16220d2fae0997f45cda94f5f0864 and fixed in 6.12.7 with commit cb12d61361ce769672c7c7bd32107252598cdd8b |
| Issue introduced in 6.11 with commit 530dd9926dc16220d2fae0997f45cda94f5f0864 and fixed in 6.13 with commit f5d09de9f1bf9674c6418ff10d0a40cfe29268e1 |
| |
| 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-2024-51729 |
| 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: |
| mm/hugetlb.c |
| mm/memory.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/cb12d61361ce769672c7c7bd32107252598cdd8b |
| https://git.kernel.org/stable/c/f5d09de9f1bf9674c6418ff10d0a40cfe29268e1 |
