Multiple vulnerabilities in Debian LTS Linux kernel (August 14, 2026)
Multiple vulnerabilities have been discovered in the Debian LTS Linux kernel. Some of them allow an attacker to cause privilege escalation, data confidentiality breach, and denial of service.
CSIRTS triage
- What
- Multiple vulnerabilities in Debian LTS Linux kernel allow privilege escalation, data confidentiality breach, and denial of service.
- Who is affected
- Systems running Debian LTS kernel are affected.
- Urgency
- Urgent; privilege escalation vulnerabilities provide direct path to system compromise.
- Action
- Apply Debian LTS kernel security updates for all listed CVEs.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1031/
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-2026-643760.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-645900.16% 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-2026-645520.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-642870.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-642700.16% 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-2026-642750.16% 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-2026-642740.16% 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-2026-645380.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-641920.12% 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-2026-644520.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 13% of all EPSS-scored CVEs.
Referenced CVEs
+12 more CVEs referenced in this advisory.
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- medium[NEW] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
- medium[NEW] [medium] Linux Kernel: Multiple vulnerabilities allow unspecified attackcert-bund
- medium[NEW] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
- unknownMultiple vulnerabilities in Ubuntu Linux kernel (August 14, 2026)cert-fr-avis
- unknownexploitedMultiple vulnerabilities in SUSE Linux kernel (August 14, 2026)cert-fr-avis
- unknownMultiple vulnerabilities in Red Hat Linux kernel (August 14, 2026)cert-fr-avis
- unknownUSN-8637-1: Linux kernel (OEM) vulnerabilitiesubuntu
- unknownUSN-8629-1: Linux kernel vulnerabilitiesubuntu
- medium[NEW] [medium] Linux Kernel: Multiple Vulnerabilitiescert-bund
- medium[NEW] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund
- highCVE-2026-64590: dma-buf/udmabuf: skip redundant cpu sync to fix cacheline EEXIST warningmsrc
- mediumCVE-2026-64598: smb/client: Fix error code in smb2_aead_req_alloc()msrc
Recent advisories for Debian LTS Linux
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.
- unknownMultiple vulnerabilities in Debian LTS Linux kernel (August 07, 2026)cert-fr-avis · 2026-08-07
- unknownMultiple vulnerabilities in Debian LTS Linux kernel (July 31, 2026)cert-fr-avis · 2026-07-31
- unknownMultiple vulnerabilities in Debian LTS Linux kernel (July 24, 2026)cert-fr-avis · 2026-07-24
- unknownMultiple vulnerabilities in Debian LTS Linux kernel (July 10, 2026)cert-fr-avis · 2026-07-10
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