---
title: "CVE-2026-99236: Linux Kernel - Out of Bounds Read/Write"
description: "Linux kernel contains a logic error in tracing event filter expressions caused by incomplete predicate parsing, letting attackers potentially cause out-of-bounds memory access, exploit requires crafted perf tracepoint filter input."
url: https://panop.io/threat-heartbeat/CVE-2026-99236/
---

# CVE-2026-99236 Linux Kernel - Out of Bounds Read/Write

Linux kernel contains a logic error in tracing event filter expressions caused by incomplete predicate parsing, letting attackers potentially cause out-of-bounds memory access, exploit requires crafted perf tracepoint filter input.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-99236)

## Details

Type

Out of Bounds Read/Write

Impact

Denial Of Service, Information Disclosure

CVSS vector

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

Published

2 November 2026

Updated

3 November 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for tracing event filter expressions.

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-2026-99236](https://nvd.nist.gov/vuln/detail/CVE-2026-99236)
- [https://git.kernel.org/stable/c/1008e9e0b8280d47f1ab5e9c113f666a023a9697](https://git.kernel.org/stable/c/1008e9e0b8280d47f1ab5e9c113f666a023a9697)
- [https://git.kernel.org/stable/c/15ff3cc7f2beecc3f95d66358f20ad7b057466aa](https://git.kernel.org/stable/c/15ff3cc7f2beecc3f95d66358f20ad7b057466aa)
- [https://git.kernel.org/stable/c/2a98f5d4913ec081e08e1075512cb7ec313d9f72](https://git.kernel.org/stable/c/2a98f5d4913ec081e08e1075512cb7ec313d9f72)
- [https://git.kernel.org/stable/c/4a1a6d35359991c5d47f4bf101cfbe1475c94093](https://git.kernel.org/stable/c/4a1a6d35359991c5d47f4bf101cfbe1475c94093)
- [https://git.kernel.org/stable/c/5a999b5a16530898f0dbe5f8c50fd45ea72e110b](https://git.kernel.org/stable/c/5a999b5a16530898f0dbe5f8c50fd45ea72e110b)
- [https://git.kernel.org/stable/c/5bcdf3c18c3471122ee9652b0e2f5cdb718d9a46](https://git.kernel.org/stable/c/5bcdf3c18c3471122ee9652b0e2f5cdb718d9a46)
- [https://git.kernel.org/stable/c/64993d970dde2a2da353e9e99595a4fa88ec27d9](https://git.kernel.org/stable/c/64993d970dde2a2da353e9e99595a4fa88ec27d9)
- [https://git.kernel.org/stable/c/b205ff58e02922ac324f931cf9eb238a3acdb048](https://git.kernel.org/stable/c/b205ff58e02922ac324f931cf9eb238a3acdb048)

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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

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