| 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-2021-47048: spi: spi-zynqmp-gqspi: fix use-after-free in zynqmp_qspi_exec_op |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| spi: spi-zynqmp-gqspi: fix use-after-free in zynqmp_qspi_exec_op |
| |
| When handling op->addr, it is using the buffer "tmpbuf" which has been |
| freed. This will trigger a use-after-free KASAN warning. Let's use |
| temporary variables to store op->addr.val and op->cmd.opcode to fix |
| this issue. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47048 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10 with commit 1c26372e5aa9e53391a1f8fe0dc7cd93a7e5ba9e and fixed in 5.10.37 with commit 1231279389b5e638bc3b66b9741c94077aed4b5a |
| Issue introduced in 5.10 with commit 1c26372e5aa9e53391a1f8fe0dc7cd93a7e5ba9e and fixed in 5.11.21 with commit d67e0d6bd92ebbb0294e7062bbf5cdc773764e62 |
| Issue introduced in 5.10 with commit 1c26372e5aa9e53391a1f8fe0dc7cd93a7e5ba9e and fixed in 5.12.4 with commit 23269ac9f123eca3aea7682d3345c02e71ed696c |
| Issue introduced in 5.10 with commit 1c26372e5aa9e53391a1f8fe0dc7cd93a7e5ba9e and fixed in 5.13 with commit a2c5bedb2d55dd27c642c7b9fb6886d7ad7bdb58 |
| |
| 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-2021-47048 |
| 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/spi/spi-zynqmp-gqspi.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/1231279389b5e638bc3b66b9741c94077aed4b5a |
| https://git.kernel.org/stable/c/d67e0d6bd92ebbb0294e7062bbf5cdc773764e62 |
| https://git.kernel.org/stable/c/23269ac9f123eca3aea7682d3345c02e71ed696c |
| https://git.kernel.org/stable/c/a2c5bedb2d55dd27c642c7b9fb6886d7ad7bdb58 |
