---
title: "CVE-2026-90358: Linux Kernel - Memory Corruption"
description: "Linux kernel contains a buffer overflow caused by under-allocated register save area for 128-bit arguments in BPF x86 trampoline, letting attackers cause memory corruption, exploit requires local code execution."
url: https://panop.io/threat-heartbeat/CVE-2026-90358/
---

# CVE-2026-90358 Linux Kernel - Memory Corruption

Linux kernel contains a buffer overflow caused by under-allocated register save area for 128-bit arguments in BPF x86 trampoline, letting attackers cause memory corruption, exploit requires local code execution.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90358)

## Details

Type

Memory Corruption

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 BPF x86 trampoline stack size.

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-2026-90358](https://nvd.nist.gov/vuln/detail/CVE-2026-90358)
- [https://git.kernel.org/stable/c/40f3bfbbb222b92278f3797614b70f68d46824ac](https://git.kernel.org/stable/c/40f3bfbbb222b92278f3797614b70f68d46824ac)
- [https://git.kernel.org/stable/c/4aed2346fa9b88d458eeb8c01123f3c07585a675](https://git.kernel.org/stable/c/4aed2346fa9b88d458eeb8c01123f3c07585a675)
- [https://git.kernel.org/stable/c/814cba835ef648e0c5eb79505c96c0493b29eea6](https://git.kernel.org/stable/c/814cba835ef648e0c5eb79505c96c0493b29eea6)
- [https://git.kernel.org/stable/c/a6d7d7a253c550e74b0651897fe313c2f9b2301f](https://git.kernel.org/stable/c/a6d7d7a253c550e74b0651897fe313c2f9b2301f)

[← All CVEs](https://panop.io/threat-heartbeat/)

## 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

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)