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Ubuntu EUVDEUVD-2026-89245

| CVE-2026-95299 CRITICAL
Use After Free (CWE-416)
2026-09-23 vendor:ubuntu GHSA-vphq-f86f-m2fj
9.6
CVSS 3.1 · Vendor: vendor:ubuntu
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Unknown affected product
  2. Exploit
    Unknown vulnerability class
  3. Impact
    Impact undetermined

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Memory lifecycle management
MITRE ATT&CK

2 techniques across 2 tactics: Execution, Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Cannot be determined. The description is empty and no CVSS vector, product feature, protocol, configuration setting, or deployment mode is specified in the available data. Retrieve the upstream Ubuntu/NVD advisory to establish prerequisites and limiting factors before any defensive decision is made.

Impact

Risk cannot be meaningfully assessed from the available data. The only signal present is that the CVE was reported/tracked by vendor:ubuntu (the Ubuntu security tracker); there is no description, no CVSS base score or vector, no CWE, no EPSS probability, no CISA KEV listing, no SSVC decision point, and no POC. With every primary prioritization signal absent, it is impossible to distinguish a genuine priority from a low-real-risk issue. No attack vector, complexity, privilege, or impact metric is available to reason about. This entry should be treated as an unresolved placeholder pending an authoritative description from the upstream vendor or NVD, and it should NOT be scored or prioritized until the source advisory is retrieved. Exploitation status: no public exploit identified at time of analysis.

Exploit ScenarioDerived

No realistic attack scenario can be constructed because the affected product, vulnerability class, and attack vector are all unknown. No POC is referenced in the provided data. Any scenario written now would be fabrication rather than analysis.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
Patch available 0.5% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 24, 2026

Risk cannot be meaningfully assessed for CVE-2026-95299 because the vulnerability record contains no description, no CVSS score or vector, no CWE mapping, and no CPE/product identifiers; the only attributable data point is that the issue was reported by the vendor Ubuntu. Consequently the affected component, the attack surface, and any prerequisite conditions remain unknown, and no public exploit has been identified at time of analysis. Analysts should treat this identifier as unresolved rather than low-risk: an empty record frequently reflects a placeholder or embargoed entry that is populated later, so the absence of detail is not evidence of low severity.

RemediationAI

No vendor-released patch has been identified at time of analysis, and it must be stressed that the absence of patch data is not confirmation that no fix exists - it reflects an incomplete vulnerability record. Until the advisory is retrieved, the actionable step is intelligence resolution rather than mitigation: pull the Ubuntu CVE tracker page for CVE-2026-95299 (https://ubuntu.com/security/CVE-2026-95299), the corresponding NVD entry, and any published USN to determine the affected package, version range, and fixed version, then apply the Ubuntu-provided package update exactly as specified in that advisory. If, after retrieval, no fixed package is available, compensating controls cannot be prescribed responsibly at this stage because the attack vector is unknown; any interim measure such as restricting network exposure, disabling a specific service, or applying AppArmor confinement would be guesswork and carries the side effect of potentially unnecessary service disruption. Escalate to the Ubuntu security team or the distributing vendor if the record remains empty, and re-run this assessment once the advisory, CVSS vector, and CWE are populated.

Affected VersionsENISA

Chrome 154.0.8037.57 <154.0.8037.57

Affected Packages

euvd chrome fix: 154.0.8037.57

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

There is insufficient technical data to describe the underlying technology, library, or protocol involved. No CWE is supplied, so the root-cause class (for example memory corruption, injection, improper authorization, or deserialization) cannot be inferred, and the lack of CPE strings means no exact affected product or version range can be enumerated. The single signal available is the reporting attribution to Ubuntu, which suggests - but does not confirm - that the issue affects a package maintained in the Ubuntu archive or an Ubuntu-specific component or kernel backport, and that a Ubuntu Security Notice (USN) or Ubuntu CVE tracker entry may exist or may be pending. Any claim about authentication requirements, exploitability complexity, or impact at this point would be speculation; per the independent assessment, prerequisites and limiting factors cannot be determined until the upstream Ubuntu/NVD advisory is retrieved.

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Severity by source

Vendor (vendor:ubuntu) PRIMARY 9.6 CRITICAL
AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
SUSE CRITICAL

Primary rating from Vendor (vendor:ubuntu).

CVSS VectorVendor: vendor:ubuntu

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

[Unknown description]

Threat Intelligence Overview

EPSS Score
0.5%
Top 62% exploitable
Data Quality
3 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 0.5%
Patch available Yes
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

48
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +48
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Use-after-free vulnerabilities occur when a program continues to access memory through a pointer after that memory has been deallocated.

Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Vendor StatusVendor

SUSE

Severity: Critical
Product Status
SUSE Package Hub 15 SP7 Fixed
openSUSE Leap 16.0 Fixed
openSUSE Tumbleweed Fixed
SUSE Package Hub 15 SP7 Affected

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