---
title: "CVE-2026-98276: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability caused by improper locking of sk_flags in sock_gettstamp(), letting attackers cause kernel memory corruption via race conditions, exploit requires concurrent socket operations."
url: https://panop.io/threat-heartbeat/CVE-2026-98276/
---

# CVE-2026-98276 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability caused by improper locking of sk\_flags in sock\_gettstamp(), letting attackers cause kernel memory corruption via race conditions, exploit requires concurrent socket operations.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.14% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-98276)

## Details

Type

Use After Free

Impact

Denial Of Service, Privilege Escalation

CVSS vector

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

Published

6 October 2026

Updated

15 October 2026

## Vendor fix

Update to Linux kernel version 6.12.95 or later where the socket locking issue is fixed.

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-2026-98276](https://nvd.nist.gov/vuln/detail/CVE-2026-98276)
- [https://git.kernel.org/stable/c/18899e2e4023369a8f7739c2255a59a9748d8d17](https://git.kernel.org/stable/c/18899e2e4023369a8f7739c2255a59a9748d8d17)
- [https://git.kernel.org/stable/c/1f73253add8365d0dad0a4f421acaa8c21d20cef](https://git.kernel.org/stable/c/1f73253add8365d0dad0a4f421acaa8c21d20cef)
- [https://git.kernel.org/stable/c/3b12d3967e96f1b7b977d9fc352ae29a1b299a82](https://git.kernel.org/stable/c/3b12d3967e96f1b7b977d9fc352ae29a1b299a82)
- [https://git.kernel.org/stable/c/88c804847dd87dc613b771b392ccecdb94725032](https://git.kernel.org/stable/c/88c804847dd87dc613b771b392ccecdb94725032)
- [https://git.kernel.org/stable/c/899650bbf985b7bfd2a7b808357df9b16e6d6959](https://git.kernel.org/stable/c/899650bbf985b7bfd2a7b808357df9b16e6d6959)
- [https://git.kernel.org/stable/c/9ed55f3dbef4f4adfe65eb03b0c35c53229a8490](https://git.kernel.org/stable/c/9ed55f3dbef4f4adfe65eb03b0c35c53229a8490)
- [https://git.kernel.org/stable/c/d9f96bc2d822501f84d1caa6275a2c6b316ca2c4](https://git.kernel.org/stable/c/d9f96bc2d822501f84d1caa6275a2c6b316ca2c4)
- [https://git.kernel.org/stable/c/17b2a1eb97fdb2a2cbaeab3b146b26797ea9311f](https://git.kernel.org/stable/c/17b2a1eb97fdb2a2cbaeab3b146b26797ea9311f)

[← 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)