Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: vhost-scsi: protect vq->log_used with vq->mutex The vhost-scsi completion path may access vq->log_base when vq->log_used is already set to false. vhost-thread QEMU-thread vhost_scsi_complete_cmd_work() -> vhost_add_used() -> vhost_add_used_n() if (unlikely(vq->log_used)) QEMU disables vq->log_used via VHOST_SET_VRING_ADDR. mutex_lock(&vq->mutex); vq->log_used = false now! mutex_unlock(&vq->mutex); QEMU gfree(vq->log_base) log_used() -> log_write(vq->log_base) Assuming the VMM is QEMU. The vq->log_base is from QEMU userpace and can be reclaimed via gfree(). As a result, this causes invalid memory writes to QEMU userspace. The control queue path has the same issue.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 057cbf49a1f08297877e46c82f707b1bfea806a8 before 80cf68489681c165ded460930e391b1eb37b5f6f; affected 057cbf49a1f08297877e46c82f707b1bfea806a8 before 8312a1ccff1566f375191a89b9ba71b6eb48a8cd; affected 057cbf49a1f08297877e46c82f707b1bfea806a8 before 59614c5acf6688f7af3c245d359082c0e9e53117; affected 057cbf49a1f08297877e46c82f707b1bfea806a8 before ca85c2d0db5f8309832be45858b960d933c2131c; affected 057cbf49a1f08297877e46c82f707b1bfea806a8 before bd8c9404e44adb9f6219c09b3409a61ab7ce3427; affected 057cbf49a1f08297877e46c82f707b1bfea806a8 before c0039e3afda29be469d29b3013d7f9bdee136834; affected 057cbf49a1f08297877e46c82f707b1bfea806a8 before f591cf9fce724e5075cc67488c43c6e39e8cbe27 |
| Linux / Linux | affected 3.6; unaffected 0 before 3.6; unaffected 5.10.240 through 5.10.*; unaffected 5.15.189 through 5.15.*; unaffected 6.1.146 through 6.1.*; unaffected 6.6.93 through 6.6.*; unaffected 6.12.31 through 6.12.*; unaffected 6.14.9 through 6.14.*; unaffected 6.15 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/80cf68489681c165ded460930e391b1eb37b5f6f
- https://git.kernel.org/stable/c/8312a1ccff1566f375191a89b9ba71b6eb48a8cd
- https://git.kernel.org/stable/c/59614c5acf6688f7af3c245d359082c0e9e53117
- https://git.kernel.org/stable/c/ca85c2d0db5f8309832be45858b960d933c2131c
- https://git.kernel.org/stable/c/bd8c9404e44adb9f6219c09b3409a61ab7ce3427
- https://git.kernel.org/stable/c/c0039e3afda29be469d29b3013d7f9bdee136834
- https://git.kernel.org/stable/c/f591cf9fce724e5075cc67488c43c6e39e8cbe27
ADP enrichment
No English description supplied.