| 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-2024-53148: comedi: Flush partial mappings in error case |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| comedi: Flush partial mappings in error case |
| |
| If some remap_pfn_range() calls succeeded before one failed, we still have |
| buffer pages mapped into the userspace page tables when we drop the buffer |
| reference with comedi_buf_map_put(bm). The userspace mappings are only |
| cleaned up later in the mmap error path. |
| |
| Fix it by explicitly flushing all mappings in our VMA on the error path. |
| |
| See commit 79a61cc3fc04 ("mm: avoid leaving partial pfn mappings around in |
| error case"). |
| |
| The Linux kernel CVE team has assigned CVE-2024-53148 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.29 with commit ed9eccbe8970f6eedc1b978c157caf1251a896d4 and fixed in 5.4.287 with commit 57f048c2d205b85e34282a9b0b0ae177e84c2f44 |
| Issue introduced in 2.6.29 with commit ed9eccbe8970f6eedc1b978c157caf1251a896d4 and fixed in 5.10.231 with commit b9322408d83accc8b96322bc7356593206288c56 |
| Issue introduced in 2.6.29 with commit ed9eccbe8970f6eedc1b978c157caf1251a896d4 and fixed in 5.15.174 with commit 8797b7712de704dc231f9e821d8eb3b9aeb3a032 |
| Issue introduced in 2.6.29 with commit ed9eccbe8970f6eedc1b978c157caf1251a896d4 and fixed in 6.1.120 with commit 16c507df509113c037cdc0ba642b9ab3389bd26c |
| Issue introduced in 2.6.29 with commit ed9eccbe8970f6eedc1b978c157caf1251a896d4 and fixed in 6.6.64 with commit 9b07fb464eb69a752406e78e62ab3a60bfa7b00d |
| Issue introduced in 2.6.29 with commit ed9eccbe8970f6eedc1b978c157caf1251a896d4 and fixed in 6.11.11 with commit c6963a06ce5c61d3238751ada04ee1569663a828 |
| Issue introduced in 2.6.29 with commit ed9eccbe8970f6eedc1b978c157caf1251a896d4 and fixed in 6.12.2 with commit 297f14fbb81895f4ccdb0ad25d196786d6461e00 |
| Issue introduced in 2.6.29 with commit ed9eccbe8970f6eedc1b978c157caf1251a896d4 and fixed in 6.13 with commit ce8f9fb651fac95dd41f69afe54d935420b945bd |
| |
| 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-2024-53148 |
| 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/comedi/comedi_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/57f048c2d205b85e34282a9b0b0ae177e84c2f44 |
| https://git.kernel.org/stable/c/b9322408d83accc8b96322bc7356593206288c56 |
| https://git.kernel.org/stable/c/8797b7712de704dc231f9e821d8eb3b9aeb3a032 |
| https://git.kernel.org/stable/c/16c507df509113c037cdc0ba642b9ab3389bd26c |
| https://git.kernel.org/stable/c/9b07fb464eb69a752406e78e62ab3a60bfa7b00d |
| https://git.kernel.org/stable/c/c6963a06ce5c61d3238751ada04ee1569663a828 |
| https://git.kernel.org/stable/c/297f14fbb81895f4ccdb0ad25d196786d6461e00 |
| https://git.kernel.org/stable/c/ce8f9fb651fac95dd41f69afe54d935420b945bd |
