Multiple vulnerabilities in Debian Linux kernel (August 14, 2026)

unknownpublic exploitCVE-2026-64561 CVE-2026-53090 CVE-2026-45901 CVE-2026-64574 CVE-2026-64584 CVE-2026-64563

Multiple vulnerabilities have been discovered in the Debian Linux kernel. They allow an attacker to cause privilege escalation, data confidentiality breach, and denial of service.

CSIRTS triage

vendor: Debian product: Linux kernel Privilege escalation Information disclosure Denial of serviceaffected: Debian

What: Multiple vulnerabilities in Debian Linux kernel allow privilege escalation, data confidentiality breach, and denial of service.
Who is affected: Debian systems running affected kernel versions are vulnerable.
Urgency: Urgent; privilege escalation capabilities enable rapid system compromise.
Action: Apply Debian kernel security updates addressing all listed CVEs immediately.

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: 2026-08-14
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-1030/

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-2026-645610.12% 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-2026-530900.13% 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-2026-459010.15% 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-2026-645740.12% 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-2026-645840.12% 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-2026-645630.12% 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-2026-645800.12% 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-2026-642800.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-645700.15% 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-2026-645680.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-64561	coverage & exploitation status	NVD · CVE.org
CVE-2026-53090	coverage & exploitation status	NVD · CVE.org
CVE-2026-45901	coverage & exploitation status	NVD · CVE.org
CVE-2026-64574	coverage & exploitation status	NVD · CVE.org
CVE-2026-64584	coverage & exploitation status	NVD · CVE.org
CVE-2026-64563	coverage & exploitation status	NVD · CVE.org
CVE-2026-64580	coverage & exploitation status	NVD · CVE.org
CVE-2026-64280	coverage & exploitation status	NVD · CVE.org
CVE-2026-64570	coverage & exploitation status	NVD · CVE.org
CVE-2026-64568	coverage & exploitation status	NVD · CVE.org
CVE-2026-64583	coverage & exploitation status	NVD · CVE.org
CVE-2026-64577	coverage & exploitation status	NVD · CVE.org
CVE-2025-40098	coverage & exploitation status	NVD · CVE.org
CVE-2026-45897	coverage & exploitation status	NVD · CVE.org
CVE-2026-64578	coverage & exploitation status	NVD · CVE.org
CVE-2026-64562	coverage & exploitation status	NVD · CVE.org
CVE-2026-64571	coverage & exploitation status	NVD · CVE.org
CVE-2026-64572	coverage & exploitation status	NVD · CVE.org
CVE-2026-64579	coverage & exploitation status	NVD · CVE.org
CVE-2026-64565	coverage & exploitation status	NVD · CVE.org
CVE-2026-64573	coverage & exploitation status	NVD · CVE.org
CVE-2026-53078	coverage & exploitation status	NVD · CVE.org
CVE-2026-64205	coverage & exploitation status	NVD · CVE.org
CVE-2026-64290	coverage & exploitation status	NVD · CVE.org
CVE-2026-64567	coverage & exploitation status	NVD · CVE.org
CVE-2026-64576	coverage & exploitation status	NVD · CVE.org
CVE-2026-64564	coverage & exploitation status	NVD · CVE.org
CVE-2026-64569	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

medium[NEW] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
critical[NEW] [high] Linux Kernel: Multiple vulnerabilitiescert-bund
unknownexploitedMultiple vulnerabilities in SUSE Linux kernel (August 14, 2026)cert-fr-avis
medium[NEW] [medium] Linux Kernel: Multiple Vulnerabilitiescert-bund
medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
mediumCVE-2026-64578: ksmbd: validate compound request size before reading StructureSize2msrc
mediumCVE-2026-64567: btrfs: reject free space cache with more entries than pagesmsrc
mediumCVE-2026-64580: xfrm6: clear dst.dev on error to avoid double netdev_put in xfrm6_fill_dst()msrc
mediumCVE-2026-64572: ipv4: fib: free fib_alias with kfree_rcu() on insert error pathmsrc
mediumCVE-2026-64576: nexthop: initialize extack in nh_res_bucket_migrate()msrc
mediumCVE-2026-64561: KVM: x86: Check for invalid/obsolete root *after* making MMU pages availablemsrc
highCVE-2026-64577: gtp: check skb_pull_data() return in gtp1u_send_echo_resp()msrc

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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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