Multiple vulnerabilities in Ubuntu Linux kernel (August 21, 2026)

unknownCVE-2026-64141 CVE-2026-46325 CVE-2026-31623 CVE-2026-43198 CVE-2026-45842 CVE-2026-31483

Multiple vulnerabilities have been discovered in Ubuntu Linux kernel. Some of them allow an attacker to cause privilege escalation, breach of data confidentiality and breach of data integrity.

CSIRTS triage

vendor: Canonical product: Linux kernel Privilege escalation Information disclosure

What: Multiple kernel vulnerabilities enable privilege escalation and breach of data confidentiality and integrity.
Who is affected: Ubuntu Linux kernel users running affected versions.
Urgency: Unknown severity but privilege escalation impact is critical; apply updates promptly.
Action: Install the latest Ubuntu Linux kernel security update (August 21, 2026).

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: 2026-08-21
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-1066/

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-2026-641410.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all EPSS-scored CVEs.
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-2026-431980.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-458420.13% 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-2026-314830.12% 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-2026-642140.12% 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-2026-640460.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-530910.13% 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-2026-314090.45% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64141	coverage & exploitation status	NVD · CVE.org
CVE-2026-46325	coverage & exploitation status	NVD · CVE.org
CVE-2026-31623	coverage & exploitation status	NVD · CVE.org
CVE-2026-43198	coverage & exploitation status	NVD · CVE.org
CVE-2026-45842	coverage & exploitation status	NVD · CVE.org
CVE-2026-31483	coverage & exploitation status	NVD · CVE.org
CVE-2026-64214	coverage & exploitation status	NVD · CVE.org
CVE-2026-64046	coverage & exploitation status	NVD · CVE.org
CVE-2026-53091	coverage & exploitation status	NVD · CVE.org
CVE-2026-31409	coverage & exploitation status	NVD · CVE.org
CVE-2026-64186	coverage & exploitation status	NVD · CVE.org
CVE-2026-43113	coverage & exploitation status	NVD · CVE.org
CVE-2026-53038	coverage & exploitation status	NVD · CVE.org
CVE-2026-31522	coverage & exploitation status	NVD · CVE.org
CVE-2026-43366	coverage & exploitation status	NVD · CVE.org
CVE-2026-43068	coverage & exploitation status	NVD · CVE.org
CVE-2026-31770	coverage & exploitation status	NVD · CVE.org
CVE-2026-23447	coverage & exploitation status	NVD · CVE.org
CVE-2026-46211	coverage & exploitation status	NVD · CVE.org
CVE-2026-63957	coverage & exploitation status	NVD · CVE.org
CVE-2026-46118	coverage & exploitation status	NVD · CVE.org
CVE-2026-53119	coverage & exploitation status	NVD · CVE.org
CVE-2026-52934	coverage & exploitation status	NVD · CVE.org
CVE-2026-46184	coverage & exploitation status	NVD · CVE.org
CVE-2026-64133	coverage & exploitation status	NVD · CVE.org
CVE-2026-31582	coverage & exploitation status	NVD · CVE.org
CVE-2026-63864	coverage & exploitation status	NVD · CVE.org
CVE-2026-53049	coverage & exploitation status	NVD · CVE.org
CVE-2026-23387	coverage & exploitation status	NVD · CVE.org
CVE-2026-31619	coverage & exploitation status	NVD · CVE.org
CVE-2026-31658	coverage & exploitation status	NVD · CVE.org
CVE-2026-64047	coverage & exploitation status	NVD · CVE.org
CVE-2026-43413	coverage & exploitation status	NVD · CVE.org
CVE-2026-64143	coverage & exploitation status	NVD · CVE.org
CVE-2026-31618	coverage & exploitation status	NVD · CVE.org
CVE-2026-64067	coverage & exploitation status	NVD · CVE.org
CVE-2026-63854	coverage & exploitation status	NVD · CVE.org
CVE-2026-31756	coverage & exploitation status	NVD · CVE.org
CVE-2026-31467	coverage & exploitation status	NVD · CVE.org
CVE-2026-52955	coverage & exploitation status	NVD · CVE.org
CVE-2026-23318	coverage & exploitation status	NVD · CVE.org
CVE-2026-23368	coverage & exploitation status	NVD · CVE.org
CVE-2026-52957	coverage & exploitation status	NVD · CVE.org
CVE-2026-63974	coverage & exploitation status	NVD · CVE.org
CVE-2026-53116	coverage & exploitation status	NVD · CVE.org
CVE-2026-52925	coverage & exploitation status	NVD · CVE.org
CVE-2026-46307	coverage & exploitation status	NVD · CVE.org
CVE-2026-46130	coverage & exploitation status	NVD · CVE.org

+12 more CVEs referenced in this advisory.

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities 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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