| 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-2025-37946: s390/pci: Fix duplicate pci_dev_put() in disable_slot() when PF has child VFs |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| s390/pci: Fix duplicate pci_dev_put() in disable_slot() when PF has child VFs |
| |
| With commit bcb5d6c76903 ("s390/pci: introduce lock to synchronize state |
| of zpci_dev's") the code to ignore power off of a PF that has child VFs |
| was changed from a direct return to a goto to the unlock and |
| pci_dev_put() section. The change however left the existing pci_dev_put() |
| untouched resulting in a doubple put. This can subsequently cause a use |
| after free if the struct pci_dev is released in an unexpected state. |
| Fix this by removing the extra pci_dev_put(). |
| |
| The Linux kernel CVE team has assigned CVE-2025-37946 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.9 with commit bcb5d6c769039c8358a2359e7c3ea5d97ce93108 and fixed in 6.12.29 with commit c488f8b53e156d6dcc0514ef0afa3a33376b8f9e |
| Issue introduced in 6.9 with commit bcb5d6c769039c8358a2359e7c3ea5d97ce93108 and fixed in 6.14.7 with commit 957529baef142d95e0d1b1bea786675bd47dbe53 |
| Issue introduced in 6.9 with commit bcb5d6c769039c8358a2359e7c3ea5d97ce93108 and fixed in 6.15 with commit 05a2538f2b48500cf4e8a0a0ce76623cc5bafcf1 |
| |
| 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-2025-37946 |
| 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/hotplug/s390_pci_hpc.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/c488f8b53e156d6dcc0514ef0afa3a33376b8f9e |
| https://git.kernel.org/stable/c/957529baef142d95e0d1b1bea786675bd47dbe53 |
| https://git.kernel.org/stable/c/05a2538f2b48500cf4e8a0a0ce76623cc5bafcf1 |
