Multiple vulnerabilities in Ubuntu Linux kernel (July 3, 2026)

unknownCVE-2026-46325 CVE-2026-31623 CVE-2026-23198 CVE-2026-43135 CVE-2026-45864 CVE-2026-43078

Multiple vulnerabilities have been discovered in the Ubuntu Linux kernel. Some of them allow an attacker to cause arbitrary code execution, privilege escalation, and a remote denial of service.

CSIRTS triage

vendor: Ubuntu product: Linux kernel Remote code execution Privilege escalation Denial of service

What: Multiple vulnerabilities can allow arbitrary code execution, privilege escalation, and remote denial of service.
Who is affected: Deployments of the Ubuntu Linux kernel.
Urgency: Remediation urgency is unclear but should be prioritized due to potential impacts.
Action: Update the Ubuntu Linux kernel to the latest version.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-FR Avis de sécurité (FR · national-cert · site)
Severity: unknown
Published: 2026-07-03
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0831/

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-463250.35% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 28% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-316230.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-231980.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-431350.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-458640.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-430780.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-317130.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-232020.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-232600.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-231670.09% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 0% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-46325	coverage & exploitation status	NVD · CVE.org
CVE-2026-31623	coverage & exploitation status	NVD · CVE.org
CVE-2026-23198	coverage & exploitation status	NVD · CVE.org
CVE-2026-43135	coverage & exploitation status	NVD · CVE.org
CVE-2026-45864	coverage & exploitation status	NVD · CVE.org
CVE-2026-43078	coverage & exploitation status	NVD · CVE.org
CVE-2026-31713	coverage & exploitation status	NVD · CVE.org
CVE-2026-23202	coverage & exploitation status	NVD · CVE.org
CVE-2026-23260	coverage & exploitation status	NVD · CVE.org
CVE-2026-23167	coverage & exploitation status	NVD · CVE.org
CVE-2026-45905	coverage & exploitation status	NVD · CVE.org
CVE-2026-46119	coverage & exploitation status	NVD · CVE.org
CVE-2026-43414	coverage & exploitation status	NVD · CVE.org
CVE-2026-46010	coverage & exploitation status	NVD · CVE.org
CVE-2026-23129	coverage & exploitation status	NVD · CVE.org
CVE-2025-38201	coverage & exploitation status	NVD · CVE.org
CVE-2026-31582	coverage & exploitation status	NVD · CVE.org
CVE-2026-46045	coverage & exploitation status	NVD · CVE.org
CVE-2026-31619	coverage & exploitation status	NVD · CVE.org
CVE-2026-31618	coverage & exploitation status	NVD · CVE.org
CVE-2026-23098	coverage & exploitation status	NVD · CVE.org
CVE-2026-47329	coverage & exploitation status	NVD · CVE.org
CVE-2026-43270	coverage & exploitation status	NVD · CVE.org
CVE-2026-46328	coverage & exploitation status	NVD · CVE.org
CVE-2025-68749	coverage & exploitation status	NVD · CVE.org
CVE-2026-46081	coverage & exploitation status	NVD · CVE.org
CVE-2026-43227	coverage & exploitation status	NVD · CVE.org
CVE-2026-45884	coverage & exploitation status	NVD · CVE.org
CVE-2026-46087	coverage & exploitation status	NVD · CVE.org
CVE-2026-43315	coverage & exploitation status	NVD · CVE.org
CVE-2026-43314	coverage & exploitation status	NVD · CVE.org
CVE-2026-23126	coverage & exploitation status	NVD · CVE.org
CVE-2026-46255	coverage & exploitation status	NVD · CVE.org
CVE-2026-31578	coverage & exploitation status	NVD · CVE.org
CVE-2026-46082	coverage & exploitation status	NVD · CVE.org
CVE-2026-43251	coverage & exploitation status	NVD · CVE.org
CVE-2026-23054	coverage & exploitation status	NVD · CVE.org
CVE-2026-43211	coverage & exploitation status	NVD · CVE.org
CVE-2026-31402	coverage & exploitation status	NVD · CVE.org
CVE-2026-46042	coverage & exploitation status	NVD · CVE.org
CVE-2026-45852	coverage & exploitation status	NVD · CVE.org
CVE-2026-43317	coverage & exploitation status	NVD · CVE.org
CVE-2026-23159	coverage & exploitation status	NVD · CVE.org
CVE-2025-68725	coverage & exploitation status	NVD · CVE.org
CVE-2026-45856	coverage & exploitation status	NVD · CVE.org
CVE-2025-71265	coverage & exploitation status	NVD · CVE.org
CVE-2026-46076	coverage & exploitation status	NVD · CVE.org
CVE-2026-23450	coverage & exploitation status	NVD · CVE.org

+12 more CVEs referenced in this advisory.

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Recent advisories for Ubuntu Linux kernel

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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