---
title: "CVE-2026-35233\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2026-35233?format=md
keywords: index, follow
---

# CVE-2026-35233

Publication date 1 May 2026

Last updated 13 May 2026

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**4.4 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2026-35233?format=md#impact-score)

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## Description

An unprivileged attacker can craft a user-space process with a malicious
ELF binary containing an out-of-range sh\_link field. When root-level dtrace
attaches to -- or instruments -- that process (via dtrace -p , pid probes,
or USDT), the ELF parser reads heap memory beyond the allocated section
cache array without any bounds check. This results in an
uninitialized/out-of-bounds heap read that can cause a NULL pointer
dereference crash of the dtrace process (DoS), or -- depending on heap
layout -- a read-then-use of a garbage pointer controlled by adjacent
allocations, providing a foothold toward further exploitation in a
privileged context.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| dtrace | 26.04 LTS resolute | Needs evaluation |
| 25.10 questing | Not in release |
| 24.04 LTS noble | Not in release |
| 22.04 LTS jammy | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

4.4 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | Attack complexity | Low |
  | Privileges required | Low |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | Low |
  | Availability impact | Low |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 4.4 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-35233)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-35233)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-35233)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-35233)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-35233>
* <https://linux.oracle.com/cve/CVE-2026-35233.html>