---
title: "CVE-2026-93787: Linux Kernel - Out of Bounds Read"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-93787/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93787)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-93787](https://nvd.nist.gov/vuln/detail/CVE-2026-93787)
- [https://git.kernel.org/stable/c/03003506c86f90312b0966283662c42fcab66e4b](https://git.kernel.org/stable/c/03003506c86f90312b0966283662c42fcab66e4b)
- [https://git.kernel.org/stable/c/6e3b965267b7313903baba2739992b1e2e92d540](https://git.kernel.org/stable/c/6e3b965267b7313903baba2739992b1e2e92d540)
- [https://git.kernel.org/stable/c/f8cf09a53a0dc1da298e9dd0ba5f21710cf119d6](https://git.kernel.org/stable/c/f8cf09a53a0dc1da298e9dd0ba5f21710cf119d6)
- [https://git.kernel.org/stable/c/4cb3d79beee0fecc739ce07af915d503f29ae557](https://git.kernel.org/stable/c/4cb3d79beee0fecc739ce07af915d503f29ae557)
- [https://git.kernel.org/stable/c/cf87ef1e62ed31a439064cef69d6eec38c68bd92](https://git.kernel.org/stable/c/cf87ef1e62ed31a439064cef69d6eec38c68bd92)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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