| 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-2024-53232: iommu/s390: Implement blocking domain |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| iommu/s390: Implement blocking domain |
| |
| This fixes a crash when surprise hot-unplugging a PCI device. This crash |
| happens because during hot-unplug __iommu_group_set_domain_nofail() |
| attaching the default domain fails when the platform no longer |
| recognizes the device as it has already been removed and we end up with |
| a NULL domain pointer and UAF. This is exactly the case referred to in |
| the second comment in __iommu_device_set_domain() and just as stated |
| there if we can instead attach the blocking domain the UAF is prevented |
| as this can handle the already removed device. Implement the blocking |
| domain to use this handling. With this change, the crash is fixed but |
| we still hit a warning attempting to change DMA ownership on a blocked |
| device. |
| |
| The Linux kernel CVE team has assigned CVE-2024-53232 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.7 with commit c76c067e488ccd55734c3e750799caf2c5956db6 and fixed in 6.11.11 with commit 3be34fa1cdbf180c1a948cfededfdf2cdc497199 |
| Issue introduced in 6.7 with commit c76c067e488ccd55734c3e750799caf2c5956db6 and fixed in 6.12.2 with commit bd89d94f3ea6fdaee983cbc69226a00b9bde6d59 |
| Issue introduced in 6.7 with commit c76c067e488ccd55734c3e750799caf2c5956db6 and fixed in 6.13 with commit ecda483339a5151e3ca30d6b82691ef6f1d17912 |
| |
| 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-2024-53232 |
| 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: |
| arch/s390/include/asm/pci.h |
| arch/s390/pci/pci.c |
| arch/s390/pci/pci_debug.c |
| drivers/iommu/s390-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/3be34fa1cdbf180c1a948cfededfdf2cdc497199 |
| https://git.kernel.org/stable/c/bd89d94f3ea6fdaee983cbc69226a00b9bde6d59 |
| https://git.kernel.org/stable/c/ecda483339a5151e3ca30d6b82691ef6f1d17912 |
