Ongoing updates on Copy.fail and variants

unknownpublic exploitCVE-2026-46300 CVE-2026-43284 CVE-2026-31431 CVE-2026-43500

Bulletin ID: 2026-030-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 05/13/2026 10:00 PM PDT This is an ongoing issue. This bulletin will be updated as more information becomes available. Description: AWS is aware of the copy.fail or DirtyFrag class of issues - a set of privilege escalation issues affecting the Linux Kernel. We will update this bulletin as more information becomes available. Please see below for current patching timelines for affected services related to the Copy.fail kernel issue and all its variants. AWS recommends that customers apply all updates addressing these issues as soon as they are available. See more details at Security Bulletin (ID: 2026-030-AWS).

CSIRTS triage

vendor: AWS product: Linux kernel Privilege escalation

What: A set of privilege escalation issues affecting the Linux Kernel.
Who is affected: AWS customers using the affected Linux kernel.
Urgency: Remediation is urgent due to the potential for exploitation.
Action: Apply all updates addressing these issues as soon as they are available.

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

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Details

Source: AWS Security Bulletins (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-06-05
Exploitation: Not in CISA KEV at last sync

Original advisory: https://aws.amazon.com/security/security-bulletins/rss/2026-030-aws/

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.

Moderate exploitation riskCVE-2026-463003.7% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 88% of all scored CVEs.
Exploitation likely imminentCVE-2026-43284EPSS puts this in the most-targeted tier (93.2% 30-day exploitation probability). Prioritize alongside KEV items. Riskier than 100% of all scored CVEs.
Exploitation likely imminentCVE-2026-31431EPSS puts this in the most-targeted tier (96.3% 30-day exploitation probability). Prioritize alongside KEV items. Riskier than 100% of all scored CVEs.
Exploitation likely imminentCVE-2026-43500EPSS puts this in the most-targeted tier (92.8% 30-day exploitation probability). Prioritize alongside KEV items. Riskier than 100% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-46300	coverage & exploitation status	NVD · CVE.org
CVE-2026-43284	coverage & exploitation status	NVD · CVE.org
CVE-2026-31431	coverage & exploitation status	NVD · CVE.org
CVE-2026-43500	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[UPDATE] [high] Linux Kernel: Multiple vulnerabilitiescert-bund
high[UPDATE] [high] Linux Kernel (Dirty Frag): Multiple vulnerabilities allow gaining administrator rightscert-bund
high[UPDATE] [high] Linux Kernel (Fragnesia): Vulnerability Allows Gaining Administrator Rightscert-bund
unknownUSN-8530-1: Linux kernel (AWS) vulnerabilitiesubuntu
unknownexploitedUSN-8528-1: Linux kernel (Xilinx ZynqMP) vulnerabilitiesubuntu
unknownMultiple vulnerabilities in SUSE Linux kernel (July 10, 2026)cert-fr-avis
unknownMultiple vulnerabilities in Red Hat Linux kernel (July 10, 2026)cert-fr-avis
unknownMultiple vulnerabilities in Red Hat Linux kernel (July 3, 2026)cert-fr-avis
unknownMultiple vulnerabilities in SUSE Linux kernel (July 3, 2026)cert-fr-avis
unknownRedHat Linux Kernel Multiple Vulnerabilitieshkcert
unknownMultiple vulnerabilities in the Red Hat Linux kernel (June 26, 2026)cert-fr-avis
unknownMultiple vulnerabilities in the Ubuntu Linux kernel (June 26, 2026)cert-fr-avis