| 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-2024-26810: vfio/pci: Lock external INTx masking ops |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| vfio/pci: Lock external INTx masking ops |
| |
| Mask operations through config space changes to DisINTx may race INTx |
| configuration changes via ioctl. Create wrappers that add locking for |
| paths outside of the core interrupt code. |
| |
| In particular, irq_type is updated holding igate, therefore testing |
| is_intx() requires holding igate. For example clearing DisINTx from |
| config space can otherwise race changes of the interrupt configuration. |
| |
| This aligns interfaces which may trigger the INTx eventfd into two |
| camps, one side serialized by igate and the other only enabled while |
| INTx is configured. A subsequent patch introduces synchronization for |
| the latter flows. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26810 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.6 with commit 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 and fixed in 5.4.274 with commit 1e71b6449d55179170efc8dee8664510bb813b42 |
| Issue introduced in 3.6 with commit 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 and fixed in 5.10.215 with commit 3dd9be6cb55e0f47544e7cdda486413f7134e3b3 |
| Issue introduced in 3.6 with commit 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 and fixed in 5.15.154 with commit ec73e079729258a05452356cf6d098bf1504d5a6 |
| Issue introduced in 3.6 with commit 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 and fixed in 6.1.84 with commit 3fe0ac10bd117df847c93408a9d428a453cd60e5 |
| Issue introduced in 3.6 with commit 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 and fixed in 6.6.24 with commit 04a4a017b9ffd7b0f427b8c376688d14cb614651 |
| Issue introduced in 3.6 with commit 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 and fixed in 6.7.12 with commit 6fe478d855b20ac1eb5da724afe16af5a2aaaa40 |
| Issue introduced in 3.6 with commit 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 and fixed in 6.8.3 with commit 03505e3344b0576fd619416793a31eae9c5b73bf |
| Issue introduced in 3.6 with commit 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 and fixed in 6.9 with commit 810cd4bb53456d0503cc4e7934e063835152c1b7 |
| |
| 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-2024-26810 |
| 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/vfio/pci/vfio_pci_intrs.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/1e71b6449d55179170efc8dee8664510bb813b42 |
| https://git.kernel.org/stable/c/3dd9be6cb55e0f47544e7cdda486413f7134e3b3 |
| https://git.kernel.org/stable/c/ec73e079729258a05452356cf6d098bf1504d5a6 |
| https://git.kernel.org/stable/c/3fe0ac10bd117df847c93408a9d428a453cd60e5 |
| https://git.kernel.org/stable/c/04a4a017b9ffd7b0f427b8c376688d14cb614651 |
| https://git.kernel.org/stable/c/6fe478d855b20ac1eb5da724afe16af5a2aaaa40 |
| https://git.kernel.org/stable/c/03505e3344b0576fd619416793a31eae9c5b73bf |
| https://git.kernel.org/stable/c/810cd4bb53456d0503cc4e7934e063835152c1b7 |
