CVSS 7.1 · High EPSS 0,16%
Kerentanan Out-of-bounds Read pada linux kernel. Skor CVSS 3.1 7.1 (High) menurut 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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 5.15.1 hingga sebelum 5.15.78 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.0.7 |
| linux | linux kernel | Versi 5.15 |
| linux | linux kernel | Versi 5.15 rc4 |
| linux | linux kernel | Versi 5.15 rc5 |
| linux | linux kernel | Versi 5.15 rc6 |
| linux | linux kernel | Versi 5.15 rc7 |
| linux | linux kernel | Versi 6.1 rc1 |
| linux | linux kernel | Versi 6.1 rc2 |