| 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-2022-48730: dma-buf: heaps: Fix potential spectre v1 gadget |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| dma-buf: heaps: Fix potential spectre v1 gadget |
| |
| It appears like nr could be a Spectre v1 gadget as it's supplied by a |
| user and used as an array index. Prevent the contents |
| of kernel memory from being leaked to userspace via speculative |
| execution by using array_index_nospec. |
| |
| [sumits: added fixes and cc: stable tags] |
| |
| The Linux kernel CVE team has assigned CVE-2022-48730 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.6 with commit c02a81fba74fe3488ad6b08bfb5a1329005418f8 and fixed in 5.10.99 with commit 5d40f1bdad3dd1a177f21a90ad4353c1ed40ba3a |
| Issue introduced in 5.6 with commit c02a81fba74fe3488ad6b08bfb5a1329005418f8 and fixed in 5.15.22 with commit 24f8e12d965b24f8aea762589e0e9fe2025c005e |
| Issue introduced in 5.6 with commit c02a81fba74fe3488ad6b08bfb5a1329005418f8 and fixed in 5.16.8 with commit cc8f7940d9c2d45f67b3d1a2f2b7a829ca561bed |
| Issue introduced in 5.6 with commit c02a81fba74fe3488ad6b08bfb5a1329005418f8 and fixed in 5.17 with commit 92c4cfaee6872038563c5b6f2e8e613f9d84d47d |
| |
| 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-2022-48730 |
| 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/dma-buf/dma-heap.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/5d40f1bdad3dd1a177f21a90ad4353c1ed40ba3a |
| https://git.kernel.org/stable/c/24f8e12d965b24f8aea762589e0e9fe2025c005e |
| https://git.kernel.org/stable/c/cc8f7940d9c2d45f67b3d1a2f2b7a829ca561bed |
| https://git.kernel.org/stable/c/92c4cfaee6872038563c5b6f2e8e613f9d84d47d |
