CVSS 7.8 · High EPSS 0,21%
Kerentanan Use After Free pada linux kernel. Skor CVSS 3.1 7.8 (High) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: vhost_vdpa: assign irq bypass producer token correctly We used to call irq_bypass_unregister_producer() in vhost_vdpa_setup_vq_irq() which is problematic as we don't know if the token pointer is still valid or not. Actually, we use the eventfd_ctx as the token so the life cycle of the token should be bound to the VHOST_SET_VRING_CALL instead of vhost_vdpa_setup_vq_irq() which could be called by set_status(). Fixing this by setting up irq bypass producer's token when handling VHOST_SET_VRING_CALL and un-registering the producer before calling vhost_vring_ioctl() to prevent a possible use after free as eventfd could have been released in vhost_vring_ioctl(). And such registering and unregistering will only be done if DRIVER_OK is set.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 5.9 hingga sebelum 5.10.227 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.168 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.1.113 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.6.54 |
| linux | linux kernel | Versi 6.7 hingga sebelum 6.10.13 |
| linux | linux kernel | Versi 6.11 hingga sebelum 6.11.2 |