CVE-2026-93782

Published: September 26, 2026Last modified: September 26, 2026

Description

In the Linux kernel, the following vulnerability has been resolved: vhost-scsi: flush backend after device ioctls vhost-scsi translates guest response descriptors into userspace iovecs when commands are submitted. Target-core completes those commands asynchronously, so VHOST_SET_MEM_TABLE can replace the memory table while an in-flight command still retains response iovecs translated through the old table. If the old mapping is reused after VHOST_SET_MEM_TABLE returns, command completion can write the response to an unrelated userspace object. Flush the vhost-scsi backend after vhost_dev_ioctl() handles a device ioctl. This waits for in-flight commands that can still use the old response iovecs before the ioctl returns.

Severity score breakdown

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References

• https://git.kernel.org/stable/c/22598f55a4c2b510b3df5e69e563387a963222ae
• https://git.kernel.org/stable/c/6c1b802e36b05ebd9d41686c4dce6f06966af469
• https://git.kernel.org/stable/c/981c97d09c6b9560bb12dcc41f11ce59b1a48e97