---
title: "CVE-2026-99051: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability caused by improper RCU synchronization in fsverity_info freeing, letting concurrent inode accesses cause memory corruption, exploit requires concurrent access to different inodes."
url: https://panop.io/threat-heartbeat/CVE-2026-99051/
---

# CVE-2026-99051 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability caused by improper RCU synchronization in fsverity\_info freeing, letting concurrent inode accesses cause memory corruption, exploit requires concurrent access to different inodes.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.20% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-99051)

## Details

Type

Use After Free

Impact

Denial Of Service, Remote Code Execution

CVSS vector

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

Published

23 October 2026

Updated

25 October 2026

## Vendor fix

Update to the latest Linux kernel version with the fsverity RCU-freeing fix.

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-2026-99051](https://nvd.nist.gov/vuln/detail/CVE-2026-99051)
- [https://git.kernel.org/stable/c/e58c3805ed325fe2d4ae2dd467c0486cc860b733](https://git.kernel.org/stable/c/e58c3805ed325fe2d4ae2dd467c0486cc860b733)
- [https://git.kernel.org/stable/c/fa84f091a8e7fc46fd29834496fab9739dd4c8dc](https://git.kernel.org/stable/c/fa84f091a8e7fc46fd29834496fab9739dd4c8dc)

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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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