CVE-2026-93787 Linux Kernel - Out of Bounds Read

Linux kernel contains a buffer overflow caused by unchecked oversized FileNameLength in SMB1 TRANS2_FIND_FIRST/FIND_NEXT response in cifs_filldir, letting attacker-controlled SMB1 servers cause out-of-bounds read, exploit requires attacker-controlled SMB1 server.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.34% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out of Bounds Read
Impact
Denial Of Service, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Published
24 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version with the fix for this vulnerability.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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