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Ubuntu Linux EUVDEUVD-2026-89151

| CVE-2026-95308 LOW
Integer Overflow or Wraparound (CWE-190)
2026-09-23 vendor:ubuntu GHSA-43hg-rhhw-cjqv
3.4
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
    Insufficient data to determine access
  2. Exploit
    Unknown vulnerability trigger
  3. Impact
    Unspecified impact

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Integer overflow checks
MITRE ATT&CK

1 technique across 1 tactic: Execution

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

Exploitation Conditions

Exploitation prerequisites cannot be determined - the description is '[Unknown description]' and no CVSS vector, affected package, protocol, or configuration detail was provided. The only known limiting/contextual factor is that the record originates from the Ubuntu security team, implying an affected package within the Ubuntu/Debian ecosystem, but the specific component, required privilege level, and whether user interaction or non-default configuration is needed are all unconfirmed. Obtain the Ubuntu Security Notice for CVE-2026-95308 to establish real conditions.

Impact

Risk cannot be meaningfully assessed from the supplied data. No CVSS base vector, no EPSS probability, no CISA KEV listing, no SSVC decision values, no POC indicator, and no vulnerability description were provided - the only signal is that the entry was surfaced by the Ubuntu security team (vendor:ubuntu), which typically indicates a flaw in a package shipped in the Ubuntu archive rather than an Ubuntu-authored product. With CWE, attack vector, complexity, and privilege metrics all absent, any severity claim would be speculation. Exploitation status is 'no public exploit identified at time of analysis'. This should be treated as an UNSCORED/UNTRIAGED item pending retrieval of the authoritative record from the Ubuntu CVE tracker (ubuntu.com/security/CVE-2026-95308) and NVD; it cannot be characterized as either a real priority or a low-risk issue until that data is obtained.

Exploit ScenarioDerived

No exploit scenario can be constructed because the vulnerability description, affected component, and attack vector are all unknown in the provided data. No public exploit code is indicated. Retrieve the Ubuntu Security Notice and NVD entry before attempting any scenario.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 24, 2026

Risk for CVE-2026-95308 cannot be meaningfully assessed from the intelligence supplied: the record carries no description, no CVSS score or vector, no CWE, and no CPE or package identifiers, and the sole source attribution is the Ubuntu security team. This indicates an issue tracked against some package within the Ubuntu/Debian ecosystem, but the affected component, the required privilege level, and whether user interaction or a non-default configuration is necessary all remain unconfirmed. No public exploit code has been identified at time of analysis, and there is no KEV listing, so there is currently no signal of active exploitation. The actionable next step is to obtain the corresponding Ubuntu Security Notice (USN) for CVE-2026-95308, which will establish the real exploitation conditions and severity.

RemediationAI

No vendor-released patch has been identified at time of analysis, and no fix version can be cited because no package, advisory, or version data was provided. The primary action is to obtain and act on the Ubuntu Security Notice for CVE-2026-95308 as soon as it is published: monitor the Canonical security notices feed and the Ubuntu CVE tracker entry for this identifier, then apply the corrected package versions via 'apt update && apt upgrade' (or a targeted 'apt install --only-upgrade <package>' once the package name is known), and verify the installed version against the advisory. Administrators running Ubuntu Pro can use the 'pro security-status' and 'ubuntu-security-status' tooling to confirm which installed packages are pending security updates. Because the vulnerable component and required privilege level are unknown, targeted compensating controls cannot be named without generating false precision; the only defensible interim measures are to keep exposure minimal by restricting network-facing services to trusted clients, applying the principle of least privilege to local accounts, and enabling AppArmor confinement where already configured - each of these has trade-offs in the form of reduced functionality or operational friction and none is a substitute for the eventual patched package. Absence of a patch in this record is not confirmation that no fix exists; it reflects missing data.

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

Nothing in the supplied data identifies the underlying technology, library, or protocol at issue. No CPE strings were provided, so the affected product and version range cannot be enumerated, and no CWE was assigned, which means the root-cause class (for example injection, memory-safety, or access-control weakness) cannot be inferred. The only structural clue is provenance: the record was reported by vendor:ubuntu, meaning the CVE is being tracked by Canonical's security team against a source package maintained in the Ubuntu archive, which in turn may be inherited from Debian or from an upstream project. In the Ubuntu model, such CVEs are typically triaged into a USN that maps the CVE to one or more binary packages, an affected release set (for example the current LTS series), and a fixed package version; none of those mappings is present here. Until that advisory data is retrieved - via the Ubuntu CVE tracker entry or the security notice itself - the vulnerable function, the attack surface (local, network, or adjacent), and the preconditions for triggering the flaw cannot be established, and any severity characterization would be speculative.

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Severity by source

Vendor (vendor:ubuntu) PRIMARY 3.4 LOW
AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

Primary rating from Vendor (vendor:ubuntu) · only source for this CVE.

CVSS VectorVendor: vendor:ubuntu

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

DescriptionCVE.org

[Unknown description]

Threat Intelligence Overview

EPSS Score
0.2%
Top 87% 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 LOW
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
LOW severity (CVSS 0.1-3.9)
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
Defer
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Low

Priority Score

17
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +17
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Integer overflow occurs when an arithmetic operation produces a result that exceeds the maximum value a given integer type can store.

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

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