| From bippy-1.2.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-37877: iommu: Clear iommu-dma ops on cleanup |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| iommu: Clear iommu-dma ops on cleanup |
| |
| If iommu_device_register() encounters an error, it can end up tearing |
| down already-configured groups and default domains, however this |
| currently still leaves devices hooked up to iommu-dma (and even |
| historically the behaviour in this area was at best inconsistent across |
| architectures/drivers...) Although in the case that an IOMMU is present |
| whose driver has failed to probe, users cannot necessarily expect DMA to |
| work anyway, it's still arguable that we should do our best to put |
| things back as if the IOMMU driver was never there at all, and certainly |
| the potential for crashing in iommu-dma itself is undesirable. Make sure |
| we clean up the dev->dma_iommu flag along with everything else. |
| |
| The Linux kernel CVE team has assigned CVE-2025-37877 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.12.26 with commit b14d98641312d972bb3f38e82eddf92898522389 |
| Fixed in 6.14.5 with commit 104a84276821aed0ed241ce0d82d6c3267e3fcb8 |
| Fixed in 6.15 with commit 280e5a30100578106a4305ce0118e0aa9b866f12 |
| |
| 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-2025-37877 |
| 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/iommu.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/b14d98641312d972bb3f38e82eddf92898522389 |
| https://git.kernel.org/stable/c/104a84276821aed0ed241ce0d82d6c3267e3fcb8 |
| https://git.kernel.org/stable/c/280e5a30100578106a4305ce0118e0aa9b866f12 |
