What’s Vulnerable › Vulnerabilities

CVE-2026-93782: vhost-scsi: flush backend after device ioctls

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-24 · updated 2026-10-03

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.

Affected products

• Linux kernel: 3.6 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/22598f55a4c2b510b3df5e69e563387a963222ae
• https://git.kernel.org/stable/c/6436411203d8c702ffc055700f1a6bde488ff681
• https://git.kernel.org/stable/c/6c1b802e36b05ebd9d41686c4dce6f06966af469
• https://git.kernel.org/stable/c/981c97d09c6b9560bb12dcc41f11ce59b1a48e97
• https://git.kernel.org/stable/c/be2636e1b21fe860db918152abf2932638d06ed7
• https://git.kernel.org/stable/c/cec088285adcc7ae23c119b6bbdb22270dc2de8f
• https://git.kernel.org/stable/c/e0bf6bed528693a6b32439ab122b34a34b66d96f

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