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CVE-2026-93801— smb/client: zero-initialize stack-allocated cifs_open_info_data

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，已修复以下漏洞： smb/client：对栈上分配的 cifs_open_info_data 进行零初始化 栈上分配的 cifs_open_info_data 可能包含随机数据。如果后续未对这些字段进行设置，可能导致部分字段具有错误的值。

CVSS 7.0 · High EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 13

VendorProduct Version RangeStatus
Linux Linux fc2f2011d3d84b56f536b4a25a4bb2fa1b13d520< 74ff47e6c4213fcfeba2de448d9cbda200507d22 affected
057ac50638bcece64b3b436d3a61b70ed6c01a34< 22532dd88694ed20bdd47523ffa709f166ce776b affected
057ac50638bcece64b3b436d3a61b70ed6c01a34< 8fce4cf4369c766a3293a05419500cbfde72e60d affected
436cfdbc57d98808fce427d9a8d97691374989b3 affected
83d3bc866530a36a465b47cce4d2a9def2411960 affected
6.12.54< 6.12.111 affected
6.6.113< 6.7 affected
6.17.4< 6.18 affected
… +5 more rows
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I. Basic Information for CVE-2026-93801

Vulnerability Information
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Vulnerability Title
smb/client: zero-initialize stack-allocated cifs_open_info_data
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: smb/client: zero-initialize stack-allocated cifs_open_info_data Stack-allocated cifs_open_info_data may contain random data. This can make some fields have wrong value if they are not set later.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/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 fc2f2011d3d84b56f536b4a25a4bb2fa1b13d520 ~ 74ff47e6c4213fcfeba2de448d9cbda200507d22 -
Linux Linux 6.18 -

II. Public POCs for CVE-2026-93801

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III. Intelligence Information for CVE-2026-93801

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Patches & Fixes for CVE-2026-93801 (3)

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-2026-97442 8.8 HIGH wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
CVE-2026-93806 8.8 HIGH wifi: cfg80211: validate assoc response length before status and IE access
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-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97455 8.4 HIGH ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
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-2026-93224 8.1 HIGH svcrdma: Fix unmatched rn_unregister on failed accept
CVE-2026-93787 8.1 HIGH smb: client: bound dirent name against end of SMB response in cifs_filldir

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-93801

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