| 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-2022-48904: iommu/amd: Fix I/O page table memory leak |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| iommu/amd: Fix I/O page table memory leak |
| |
| The current logic updates the I/O page table mode for the domain |
| before calling the logic to free memory used for the page table. |
| This results in IOMMU page table memory leak, and can be observed |
| when launching VM w/ pass-through devices. |
| |
| Fix by freeing the memory used for page table before updating the mode. |
| |
| The Linux kernel CVE team has assigned CVE-2022-48904 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.12 with commit e42ba0633064ef23eb1c8c21edf96bac1541bd4b and fixed in 5.15.27 with commit 378e2fe1eb58d5c2ed55c8fe5e11f9db5033cdd6 |
| Issue introduced in 5.12 with commit e42ba0633064ef23eb1c8c21edf96bac1541bd4b and fixed in 5.16.13 with commit c78627f757e37c2cf386b59c700c4e1574988597 |
| Issue introduced in 5.12 with commit e42ba0633064ef23eb1c8c21edf96bac1541bd4b and fixed in 5.17 with commit 6b0b2d9a6a308bcd9300c2d83000a82812c56cea |
| |
| 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-2022-48904 |
| 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/iommu/amd/io_pgtable.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/378e2fe1eb58d5c2ed55c8fe5e11f9db5033cdd6 |
| https://git.kernel.org/stable/c/c78627f757e37c2cf386b59c700c4e1574988597 |
| https://git.kernel.org/stable/c/6b0b2d9a6a308bcd9300c2d83000a82812c56cea |
