CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, при специфични условия, с обикновен потребителски вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: PCI/IOV: Skip VF Resizable BAR restore on read error sriov_restore_vf_rebar_state() uses the VF Resizable BAR Control register to decide how many VF BARs to restore (nbars) and which VF BAR each iteration addresses (bar_idx). bar_idx indexes into dev->sriov->barsz[], which has only PCI_SRIOV_NUM_BARS (6) entries. When a device does not respond, config reads typically return PCI_ERROR_RESPONSE (~0). Both fields are 3 bits wide, so nbars and bar_idx both evaluate to 7. The barsz[] access then goes out of bounds. UBSAN reports this as: UBSAN: array-index-out-of-bounds in drivers/pci/iov.c:948:51 index 7 is out of range for type 'resource_size_t [6]' Observed on an NVIDIA RTX PRO 1000 GPU (GB207GLM) that stopped responding during a failed GC6 power state exit. The subsequent pci_restore_state() invoked sriov_restore_vf_rebar_state() while config reads returned 0xffffffff, triggering the splat. Bail out if any VF Resizable BAR Control read returns PCI_ERROR_RESPONSE. No further VF BARs are touched, which is safe because a config read that returns PCI_ERROR_RESPONSE indicates the device is unreachable and restoration is pointless. This mirrors the guard in pci_restore_rebar_state().
Засегнати продукти
- Linux Linux: 5a8f77e24a30bbce2fa57926f3dede84894fd10a преди b77524621250407386f44c6eea7e5e4619ada1ce; 5a8f77e24a30bbce2fa57926f3dede84894fd10a преди 55fd485e66d0ad5c762c23dba1461fe9c741cd96; 5a8f77e24a30bbce2fa57926f3dede84894fd10a преди f34f1712229d71ce4286440fef12526fd4590b37
- Linux Linux: 6.17; преди 6.17; 6.18.39 до 6.18.*; 7.1.4 до 7.1.*; от 7.2 нататък
Вид слабост
История
- 25 юли 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-64460
- https://nvd.nist.gov/vuln/detail/CVE-2026-64460
- https://git.kernel.org/stable/c/b77524621250407386f44c6eea7e5e4619ada1ce
- https://git.kernel.org/stable/c/55fd485e66d0ad5c762c23dba1461fe9c741cd96
- https://git.kernel.org/stable/c/f34f1712229d71ce4286440fef12526fd4590b37