CVE-2026-93801

smb/client: zero-initialize stack-allocated cifs_open_info_data

HIGH

CVSS Score

Published: September 24, 2026 at 04:02 PM UTC

Updated: October 21, 2026 at 01:21 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

HIGH7

Exploit prediction

EPSS 0.1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

90%

057ac50638bcece64b3b436d3a61b70ed6c01a34436cfdbc57d98808fce427d9a8d97691374989b357ac50638bcece64b3b436d3a61b70ed6c1a346.12.54 6.17.4 6.18 6.6.11383d3bc866530a36a465b47cce4d2a9def2411960fc2f2011d3d84b56f536b4a25a4bb2fa1b13d520

Vendor states this is fixed in 22532dd88694ed20bdd47523ffa709f166ce776b (fixed)

Vendor states this is fixed in 74ff47e6c4213fcfeba2de448d9cbda200507d22 (fixed)

Vendor states this is fixed in 8fce4cf4369c766a3293a05419500cbfde72e60d (fixed)

Vendor states this is fixed in 6.12.111 (unaffected)

Vendor states this is fixed in 6.18 (unaffected)

Vendor states this is fixed in 6.18.53 (unaffected)

Vendor states this is fixed in 6.6.160 (unaffected)

Affected range stops below 6.7, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 7.2 (unaffected)