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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： vhost-scsi：在处理设备 ioctl 后刷新后端 vhost-scsi 在提交命令时，会将客户机响应描述符转换为用户空间的 iovec（向量）。由于 target-core 是异步完成这些命令的，因此 可以在仍有命令处于飞行状态时替换内存表，而该命令仍保留着通过旧内存表转换得到的响应 iovec。 如果在 返回后重新使用了旧的内存映射，命令完成时可能会将响应写入一个无关的用户空间对象中。 因此，在 处理设备 ioctl 后，会刷新 vhost-scsi 后端。这

CVSS 7.8 · High EPSS 0.12% · P2

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 057cbf49a1f08297877e46c82f707b1bfea806a8< 6436411203d8c702ffc055700f1a6bde488ff681 affected
057cbf49a1f08297877e46c82f707b1bfea806a8< cec088285adcc7ae23c119b6bbdb22270dc2de8f affected
057cbf49a1f08297877e46c82f707b1bfea806a8< e0bf6bed528693a6b32439ab122b34a34b66d96f affected
057cbf49a1f08297877e46c82f707b1bfea806a8< be2636e1b21fe860db918152abf2932638d06ed7 affected
057cbf49a1f08297877e46c82f707b1bfea806a8< 981c97d09c6b9560bb12dcc41f11ce59b1a48e97 affected
057cbf49a1f08297877e46c82f707b1bfea806a8< 6c1b802e36b05ebd9d41686c4dce6f06966af469 affected
057cbf49a1f08297877e46c82f707b1bfea806a8< 22598f55a4c2b510b3df5e69e563387a963222ae affected
3.6 affected
… +8 more rows
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I. Basic Information for CVE-2026-93782

Vulnerability Information
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Vulnerability Title
vhost-scsi: flush backend after device ioctls
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 057cbf49a1f08297877e46c82f707b1bfea806a8 ~ 6436411203d8c702ffc055700f1a6bde488ff681 -
Linux Linux 3.6 -

II. Public POCs for CVE-2026-93782

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III. Intelligence Information for CVE-2026-93782

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Patches & Fixes for CVE-2026-93782 (7)

Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total

CVE-2026-93207 9.8 CRITICAL SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry
CVE-2026-97413 9.8 CRITICAL RDMA/rtrs-srv: Fix integer underflow in process_read and process_write
CVE-2026-93228 9.1 CRITICAL svcrdma: Reject Write/Reply chunks with segcount 0
CVE-2026-93793 8.8 HIGH wifi: iwlwifi: mvm: validate TX_CMD response layout
CVE-2026-93799 8.8 HIGH wifi: iwlwifi: mvm: validate sta_id in BA window status notif
CVE-2026-93790 8.8 HIGH wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif
CVE-2026-93806 8.8 HIGH wifi: cfg80211: validate assoc response length before status and IE access
CVE-2026-97442 8.8 HIGH wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
CVE-2026-97509 8.8 HIGH thunderbolt: Keep XDomain reference during the lifetime of a service
CVE-2026-97409 8.8 HIGH nvme-fc: Do not cancel requests in io target before it is initialized
CVE-2026-93280 8.8 HIGH greybus: audio: bound the topology section sizes against the fetched size
CVE-2026-93284 8.8 HIGH drm/pagemap: dma-unmap pages before handling migration errors
CVE-2026-97451 8.4 HIGH ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
CVE-2026-97455 8.4 HIGH ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
CVE-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97450 8.4 HIGH ACPICA: validate handler object type in two places
CVE-2026-93827 8.4 HIGH virtio-fs: avoid double-free on failed queue setup
CVE-2026-97433 8.2 HIGH nvme: validate FDP configuration descriptor sizes
CVE-2026-93786 8.1 HIGH ksmbd: preserve VFS inherited POSIX ACL mask
CVE-2026-93282 8.1 HIGH ksmbd: fix maximum allowed access checks

Showing top 20 of 234 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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