UBUNTU-CVE-2026-35233

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Source

https://ubuntu.com/security/CVE-2026-35233

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-35233.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-35233

Upstream

CVE-2026-35233

Published

2026-05-01T18:16:00Z

Modified

2026-05-20T16:25:35Z

Severity

4.4 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

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.

References

Affected packages

Ubuntu:26.04:LTS / dtrace

Package

Name: dtrace
Purl: pkg:deb/ubuntu/dtrace?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

2.*

2.0.5-1

2.0.6-1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "dtrace",
            "binary_version": "2.0.6-1"
        },
        {
            "binary_name": "dtrace-tests",
            "binary_version": "2.0.6-1"
        },
        {
            "binary_name": "libdtrace2",
            "binary_version": "2.0.6-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-35233.json"