---
title: "CVE-2026-98952: Linux Kernel - Out-of-Bounds Read"
description: "Linux kernel contains a buffer over-read vulnerability in pfcp_session_recv due to improper linearization of SEID in PFCP packets, letting attackers cause out-of-bounds reads, exploit requires crafted PFCP packets with S flag set."
url: https://panop.io/threat-heartbeat/CVE-2026-98952/
---

# CVE-2026-98952 Linux Kernel - Out-of-Bounds Read

Linux kernel contains a buffer over-read vulnerability in pfcp\_session\_recv due to improper linearization of SEID in PFCP packets, letting attackers cause out-of-bounds reads, exploit requires crafted PFCP packets with S flag set.

CVSS base score 7.3 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.21% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-98952)

## Details

Type

Out-of-Bounds Read

Impact

Information Disclosure, Denial Of Service

CVSS vector

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

Published

23 October 2026

Updated

25 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for SEID linearization in PFCP.

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-2026-98952](https://nvd.nist.gov/vuln/detail/CVE-2026-98952)
- [https://git.kernel.org/stable/c/23609bce9e1de525d1d0e73fc68c6e7971d0b49e](https://git.kernel.org/stable/c/23609bce9e1de525d1d0e73fc68c6e7971d0b49e)
- [https://git.kernel.org/stable/c/2fb6d05f706d79bbdc88835be2f4f45ab56dd819](https://git.kernel.org/stable/c/2fb6d05f706d79bbdc88835be2f4f45ab56dd819)
- [https://git.kernel.org/stable/c/3192a5e398c64d48aad64a09e29643e327369bc4](https://git.kernel.org/stable/c/3192a5e398c64d48aad64a09e29643e327369bc4)
- [https://git.kernel.org/stable/c/b18a6496495495e2dc27e525aa3315a0c59b9513](https://git.kernel.org/stable/c/b18a6496495495e2dc27e525aa3315a0c59b9513)

[← 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)