CVE-2026-93782

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux057cbf49a1f08297877e46c82f707b1bfea806a8 < 6436411203d8c702ffc055700f1a6bde488ff681affected
LinuxLinux057cbf49a1f08297877e46c82f707b1bfea806a8 < cec088285adcc7ae23c119b6bbdb22270dc2de8faffected
LinuxLinux057cbf49a1f08297877e46c82f707b1bfea806a8 < e0bf6bed528693a6b32439ab122b34a34b66d96faffected
LinuxLinux057cbf49a1f08297877e46c82f707b1bfea806a8 < be2636e1b21fe860db918152abf2932638d06ed7affected
LinuxLinux057cbf49a1f08297877e46c82f707b1bfea806a8 < 981c97d09c6b9560bb12dcc41f11ce59b1a48e97affected
LinuxLinux057cbf49a1f08297877e46c82f707b1bfea806a8 < 6c1b802e36b05ebd9d41686c4dce6f06966af469affected
LinuxLinux057cbf49a1f08297877e46c82f707b1bfea806a8 < 22598f55a4c2b510b3df5e69e563387a963222aeaffected
LinuxLinux3.6affected
LinuxLinux0 < 3.6unaffected
LinuxLinux5.10.271 <= 5.10.*unaffected
LinuxLinux5.15.222 <= 5.15.*unaffected
LinuxLinux6.1.189 <= 6.1.*unaffected
LinuxLinux6.6.158 <= 6.6.*unaffected
LinuxLinux6.12.111 <= 6.12.*unaffected
LinuxLinux6.18.53 <= 6.18.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References