---
title: "CVE-2026-90052: Linux kernel dm-integrity - Buffer Overflow"
description: "Linux kernel dm-integrity contains a buffer overflow caused by writing a checksum past the end of the allocated buffer in integrity_metadata during keyed discard operations, letting attackers cause memory corruption, exploit requires crafted discard operations."
url: https://panop.io/threat-heartbeat/CVE-2026-90052/
---

# CVE-2026-90052 Linux kernel dm-integrity - Buffer Overflow

Linux kernel dm-integrity contains a buffer overflow caused by writing a checksum past the end of the allocated buffer in integrity\_metadata during keyed discard operations, letting attackers cause memory corruption, exploit requires crafted discard operations.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.19% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90052)

## Details

Type

Buffer Overflow

Impact

Remote Code Execution, Denial Of Service

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for commit 68c5c42567bc.

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-2026-90052](https://nvd.nist.gov/vuln/detail/CVE-2026-90052)
- [https://git.kernel.org/stable/c/59e6f919d77d72ec79cbf171256f2f7819737580](https://git.kernel.org/stable/c/59e6f919d77d72ec79cbf171256f2f7819737580)
- [https://git.kernel.org/stable/c/9988c1c9e0d1c78391e3d8e2817beb667470c76f](https://git.kernel.org/stable/c/9988c1c9e0d1c78391e3d8e2817beb667470c76f)
- [https://git.kernel.org/stable/c/dd08a645195f410f2dcaa40de379a45ce110e873](https://git.kernel.org/stable/c/dd08a645195f410f2dcaa40de379a45ce110e873)

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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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