| 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-2025-22092: PCI: Fix NULL dereference in SR-IOV VF creation error path |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| PCI: Fix NULL dereference in SR-IOV VF creation error path |
| |
| Clean up when virtfn setup fails to prevent NULL pointer dereference |
| during device removal. The kernel oops below occurred due to incorrect |
| error handling flow when pci_setup_device() fails. |
| |
| Add pci_iov_scan_device(), which handles virtfn allocation and setup and |
| cleans up if pci_setup_device() fails, so pci_iov_add_virtfn() doesn't need |
| to call pci_stop_and_remove_bus_device(). This prevents accessing |
| partially initialized virtfn devices during removal. |
| |
| BUG: kernel NULL pointer dereference, address: 00000000000000d0 |
| RIP: 0010:device_del+0x3d/0x3d0 |
| Call Trace: |
| pci_remove_bus_device+0x7c/0x100 |
| pci_iov_add_virtfn+0xfa/0x200 |
| sriov_enable+0x208/0x420 |
| mlx5_core_sriov_configure+0x6a/0x160 [mlx5_core] |
| sriov_numvfs_store+0xae/0x1a0 |
| |
| [bhelgaas: commit log, return ERR_PTR(-ENOMEM) directly] |
| |
| The Linux kernel CVE team has assigned CVE-2025-22092 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.13 with commit e3f30d563a388220a7c4e3b9a7b52ac0b0324b26 and fixed in 6.13.11 with commit ef421b4d206f0d3681804b8f94f06a8458a53aaf |
| Issue introduced in 6.13 with commit e3f30d563a388220a7c4e3b9a7b52ac0b0324b26 and fixed in 6.14.2 with commit c67a233834b778b8c78f8b62c072ccf87a9eb6d0 |
| Issue introduced in 6.13 with commit e3f30d563a388220a7c4e3b9a7b52ac0b0324b26 and fixed in 6.15 with commit 04d50d953ab46d96b0b32d5ad955fceaa28622db |
| |
| 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-2025-22092 |
| 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/iov.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/ef421b4d206f0d3681804b8f94f06a8458a53aaf |
| https://git.kernel.org/stable/c/c67a233834b778b8c78f8b62c072ccf87a9eb6d0 |
| https://git.kernel.org/stable/c/04d50d953ab46d96b0b32d5ad955fceaa28622db |
