| 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-2024-56561: PCI: endpoint: Fix PCI domain ID release in pci_epc_destroy() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| PCI: endpoint: Fix PCI domain ID release in pci_epc_destroy() |
| |
| pci_epc_destroy() invokes pci_bus_release_domain_nr() to release the PCI |
| domain ID, but there are two issues: |
| |
| - 'epc->dev' is passed to pci_bus_release_domain_nr() which was already |
| freed by device_unregister(), leading to a use-after-free issue. |
| |
| - Domain ID corresponds to the EPC device parent, so passing 'epc->dev' |
| is also wrong. |
| |
| Fix these issues by passing 'epc->dev.parent' to |
| pci_bus_release_domain_nr() and also do it before device_unregister(). |
| |
| [mani: reworded subject and description] |
| |
| The Linux kernel CVE team has assigned CVE-2024-56561 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.12 with commit 0328947c50324cf4b2d8b181bf948edb8101f59f and fixed in 6.12.4 with commit c74a1df6c2a2df7dd45c3fc1a5edc29a075dcf22 |
| Issue introduced in 6.12 with commit 0328947c50324cf4b2d8b181bf948edb8101f59f and fixed in 6.13 with commit 4acc902ed3743edd4ac2d3846604a99d17104359 |
| Issue introduced in 6.11.4 with commit a4934cd7a18d35fc57025f23773f6f19e2b2dbb1 |
| |
| 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-2024-56561 |
| 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/pci/endpoint/pci-epc-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/c74a1df6c2a2df7dd45c3fc1a5edc29a075dcf22 |
| https://git.kernel.org/stable/c/4acc902ed3743edd4ac2d3846604a99d17104359 |
