---
title: "CVE-2026-93147: Linux Kernel - Undefined"
description: "Linux kernel contains a vulnerability in s390/bpf where the ly instruction loads a 32-bit cpu_nr into a 64-bit register without zeroing upper bits, letting attackers cause potential data corruption, exploit requires crafted BPF programs."
url: https://panop.io/threat-heartbeat/CVE-2026-93147/
---

# CVE-2026-93147 Linux Kernel - Undefined

Linux kernel contains a vulnerability in s390/bpf where the ly instruction loads a 32-bit cpu\_nr into a 64-bit register without zeroing upper bits, letting attackers cause potential data corruption, exploit requires crafted BPF programs.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93147)

## Details

Type

Undefined

Impact

Privilege Escalation, 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 with the s390/bpf ly instruction replaced by llgf.

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-2026-93147](https://nvd.nist.gov/vuln/detail/CVE-2026-93147)
- [https://git.kernel.org/stable/c/5f6cc299938b561cb01e343bab7042611fcee12a](https://git.kernel.org/stable/c/5f6cc299938b561cb01e343bab7042611fcee12a)
- [https://git.kernel.org/stable/c/88500a86ab79f01c568de6ed00f5b1c5c79f11d5](https://git.kernel.org/stable/c/88500a86ab79f01c568de6ed00f5b1c5c79f11d5)

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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

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

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