| 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-2024-42279: spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer |
| |
| While transmitting with rx_len == 0, the RX FIFO is not going to be |
| emptied in the interrupt handler. A subsequent transfer could then |
| read crap from the previous transfer out of the RX FIFO into the |
| start RX buffer. The core provides a register that will empty the RX and |
| TX FIFOs, so do that before each transfer. |
| |
| The Linux kernel CVE team has assigned CVE-2024-42279 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.0 with commit 9ac8d17694b66d54b13e9718b25c14ca36dbebbd and fixed in 6.6.44 with commit 3feda3677e8bbe833c3a62a4091377a08f015b80 |
| Issue introduced in 6.0 with commit 9ac8d17694b66d54b13e9718b25c14ca36dbebbd and fixed in 6.10.3 with commit 45e03d35229b680b79dfea1103a1f2f07d0b5d75 |
| Issue introduced in 6.0 with commit 9ac8d17694b66d54b13e9718b25c14ca36dbebbd and fixed in 6.11 with commit 9cf71eb0faef4bff01df4264841b8465382d7927 |
| |
| 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-2024-42279 |
| 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-microchip-core.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/3feda3677e8bbe833c3a62a4091377a08f015b80 |
| https://git.kernel.org/stable/c/45e03d35229b680b79dfea1103a1f2f07d0b5d75 |
| https://git.kernel.org/stable/c/9cf71eb0faef4bff01df4264841b8465382d7927 |
