| 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-2024-41077: null_blk: fix validation of block size |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| null_blk: fix validation of block size |
| |
| Block size should be between 512 and PAGE_SIZE and be a power of 2. The current |
| check does not validate this, so update the check. |
| |
| Without this patch, null_blk would Oops due to a null pointer deref when |
| loaded with bs=1536 [1]. |
| |
| |
| [axboe: remove unnecessary braces and != 0 check] |
| |
| The Linux kernel CVE team has assigned CVE-2024-41077 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.10.223 with commit 9625afe1dd4a158a14bb50f81af9e2dac634c0b1 |
| Fixed in 5.15.164 with commit 9b873bdaae64bddade9d8c6df23c8a31948d47d0 |
| Fixed in 6.1.101 with commit 2772ed2fc075eef7df3789906fc9dae01e4e132e |
| Fixed in 6.6.42 with commit 08f03186b96e25e3154916a2e70732557c770ea7 |
| Fixed in 6.9.11 with commit f92409a9da02f27d05d713bff5f865e386cef9b3 |
| Fixed in 6.10 with commit c462ecd659b5fce731f1d592285832fd6ad54053 |
| |
| 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-2024-41077 |
| 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: |
| drivers/block/null_blk/main.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/9625afe1dd4a158a14bb50f81af9e2dac634c0b1 |
| https://git.kernel.org/stable/c/9b873bdaae64bddade9d8c6df23c8a31948d47d0 |
| https://git.kernel.org/stable/c/2772ed2fc075eef7df3789906fc9dae01e4e132e |
| https://git.kernel.org/stable/c/08f03186b96e25e3154916a2e70732557c770ea7 |
| https://git.kernel.org/stable/c/f92409a9da02f27d05d713bff5f865e386cef9b3 |
| https://git.kernel.org/stable/c/c462ecd659b5fce731f1d592285832fd6ad54053 |
