| 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-2023-52631: fs/ntfs3: Fix an NULL dereference bug |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| fs/ntfs3: Fix an NULL dereference bug |
| |
| The issue here is when this is called from ntfs_load_attr_list(). The |
| "size" comes from le32_to_cpu(attr->res.data_size) so it can't overflow |
| on a 64bit systems but on 32bit systems the "+ 1023" can overflow and |
| the result is zero. This means that the kmalloc will succeed by |
| returning the ZERO_SIZE_PTR and then the memcpy() will crash with an |
| Oops on the next line. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52631 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit be71b5cba2e6485e8959da7a9f9a44461a1bb074 and fixed in 5.15.149 with commit ae4acad41b0f93f1c26cc0fc9135bb79d8282d0b |
| Issue introduced in 5.15 with commit be71b5cba2e6485e8959da7a9f9a44461a1bb074 and fixed in 6.1.78 with commit ec1bedd797588fe38fc11cba26d77bb1d9b194c6 |
| Issue introduced in 5.15 with commit be71b5cba2e6485e8959da7a9f9a44461a1bb074 and fixed in 6.6.17 with commit fb7bcd1722bc9bc55160378f5f99c01198fd14a7 |
| Issue introduced in 5.15 with commit be71b5cba2e6485e8959da7a9f9a44461a1bb074 and fixed in 6.7.5 with commit 686820fe141ea0220fc6fdfc7e5694f915cf64b2 |
| Issue introduced in 5.15 with commit be71b5cba2e6485e8959da7a9f9a44461a1bb074 and fixed in 6.8 with commit b2dd7b953c25ffd5912dda17e980e7168bebcf6c |
| |
| 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-2023-52631 |
| 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: |
| fs/ntfs3/ntfs_fs.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/ae4acad41b0f93f1c26cc0fc9135bb79d8282d0b |
| https://git.kernel.org/stable/c/ec1bedd797588fe38fc11cba26d77bb1d9b194c6 |
| https://git.kernel.org/stable/c/fb7bcd1722bc9bc55160378f5f99c01198fd14a7 |
| https://git.kernel.org/stable/c/686820fe141ea0220fc6fdfc7e5694f915cf64b2 |
| https://git.kernel.org/stable/c/b2dd7b953c25ffd5912dda17e980e7168bebcf6c |
