Yüksek CVSS 7.1
CVE-2022-50307: Linux Kernel: sınır dışı okuma
Açıklama (NVD)
In the Linux kernel, the following vulnerability has been resolved: s390/cio: fix out-of-bounds access on cio_ignore free The channel-subsystem-driver scans for newly available devices whenever device-IDs are removed from the cio_ignore list using a command such as: echo free >/proc/cio_ignore Since an I/O device scan might interfer with running I/Os, commit 172da89ed0ea ("s390/cio: avoid excessive path-verification requests") introduced an optimization to exclude online devices from the scan. The newly added check for online devices incorrectly assumes that an I/O-subchannel's drvdata points to a struct io_subchannel_private. For devices that are bound to a non-default I/O subchannel driver, such as the vfio_ccw driver, this results in an out-of-bounds read access during each scan. Fix this by changing the scan logic to rely on a driver-independent online indication. For this we can use struct subchannel->config.ena, which is the driver's requested subchannel-enabled state. Since I/Os can only be started on enabled subchannels, this matches the intent of the original optimization of not scanning devices where I/O might be running.
Özet bilgiler
- Ürün
- Linux Linux Kernel
- CVSS v3.1
- 7.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H - EPSS
- %0,16 (yüzdelik 5)
- CWE
- CWE-125
- Yama
- Mevcut
Etkilenen sürümler
| Ürün | Başlangıç | Bitiş | Düzeltildi |
|---|---|---|---|
| linux-linux-kernel | 5.15.1 | — | 5.15.78 |
| linux-linux-kernel | 5.16 | — | 6.0.7 |
| linux-linux-kernel | 5.15 | 5.15 | — |
| linux-linux-kernel | 5.15 | 5.15 | — |
| linux-linux-kernel | 5.15 | 5.15 | — |
| linux-linux-kernel | 5.15 | 5.15 | — |
| linux-linux-kernel | 5.15 | 5.15 | — |
| linux-linux-kernel | 6.1 | 6.1 | — |
| linux-linux-kernel | 6.1 | 6.1 | — |