| 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-2024-38604: block: refine the EOF check in blkdev_iomap_begin |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| block: refine the EOF check in blkdev_iomap_begin |
| |
| blkdev_iomap_begin rounds down the offset to the logical block size |
| before stashing it in iomap->offset and checking that it still is |
| inside the inode size. |
| |
| Check the i_size check to the raw pos value so that we don't try a |
| zero size write if iter->pos is unaligned. |
| |
| The Linux kernel CVE team has assigned CVE-2024-38604 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.6 with commit 487c607df790d366e67a7d6a30adf785cdd98e55 and fixed in 6.6.33 with commit 910717920c8c3f9386277a44c44d448058a18084 |
| Issue introduced in 6.6 with commit 487c607df790d366e67a7d6a30adf785cdd98e55 and fixed in 6.8.12 with commit 72c54e063c32aeb38d43a2bd897821e6e5a1757d |
| Issue introduced in 6.6 with commit 487c607df790d366e67a7d6a30adf785cdd98e55 and fixed in 6.9.3 with commit 10b723bcba8986537a484aa94dbfc9093fd776a1 |
| Issue introduced in 6.6 with commit 487c607df790d366e67a7d6a30adf785cdd98e55 and fixed in 6.10 with commit 0c12028aec837f5a002009bbf68d179d506510e8 |
| |
| 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-2024-38604 |
| 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: |
| block/fops.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/910717920c8c3f9386277a44c44d448058a18084 |
| https://git.kernel.org/stable/c/72c54e063c32aeb38d43a2bd897821e6e5a1757d |
| https://git.kernel.org/stable/c/10b723bcba8986537a484aa94dbfc9093fd776a1 |
| https://git.kernel.org/stable/c/0c12028aec837f5a002009bbf68d179d506510e8 |
