[NEW] [medium] Linux Kernel: Multiple vulnerabilities
A local attacker can exploit multiple vulnerabilities in the Linux Kernel to corrupt memory, disclose confidential information, manipulate data, or cause a Denial-of-Service condition.
CSIRTS triage
- What
- Multiple vulnerabilities in the Linux Kernel can be exploited to corrupt memory, disclose confidential information, manipulate data, or cause a Denial-of-Service condition.
- Who is affected
- Deployments of the Linux Kernel are affected by these vulnerabilities.
- Urgency
- Remediation is medium urgency as the vulnerabilities are serious but not confirmed to be actively exploited.
- Action
- Update to the latest version of the Linux Kernel to mitigate these vulnerabilities.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2536
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-2026-645370.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all 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 scored CVEs.
- Low exploitation riskCVE-2026-645390.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all scored CVEs.
- Low exploitation riskCVE-2026-645400.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all scored CVEs.
- Low exploitation riskCVE-2026-645410.52% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all scored CVEs.
- Low exploitation riskCVE-2026-645420.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 6% of all scored CVEs.
- Low exploitation riskCVE-2026-645430.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all scored CVEs.
- Low exploitation riskCVE-2026-645440.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all scored CVEs.
- Low exploitation riskCVE-2026-645450.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all scored CVEs.
- Low exploitation riskCVE-2026-645460.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all scored CVEs.
Referenced CVEs
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownDSA-6405-1 linux - security updatedebian
- highCVE-2026-64555: In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Fix SPSR_E…nvd
- highCVE-2026-64554: In the Linux kernel, the following vulnerability has been resolved: netfilter: bridge: fix sta…nvd
- unknownCVE-2026-64553: In the Linux kernel, the following vulnerability has been resolved: net: psample: fix info lea…nvd
- highCVE-2026-64552: In the Linux kernel, the following vulnerability has been resolved: virtio-net: fix len check …nvd
- criticalCVE-2026-64551: In the Linux kernel, the following vulnerability has been resolved: sctp: validate STALE_COOKI…nvd
- highCVE-2026-64550: In the Linux kernel, the following vulnerability has been resolved: net: qualcomm: rmnet: vali…nvd
- unknownCVE-2026-64549: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bpa10x: avoid O…nvd
- highCVE-2026-64548: In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: reject overf…nvd
- highCVE-2026-64547: In the Linux kernel, the following vulnerability has been resolved: net: usb: net1080: validat…nvd
- highCVE-2026-64546: In the Linux kernel, the following vulnerability has been resolved: drm/edid: fix OOB read in …nvd
- highCVE-2026-64545: In the Linux kernel, the following vulnerability has been resolved: net, bpf: check master for…nvd
Recent advisories for 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.
- highUSN-8620-4: Linux kernel (Intel IoTG) vulnerabilitiesubuntu · 2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow denial of servicecert-bund · 2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow Denial of Servicecert-bund · 2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow denial of servicecert-bund · 2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilitiescert-bund · 2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow unspecified attackcert-bund · 2026-07-31
More from CERT-Bund (BSI) Security Advisories
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow denial of service2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow Denial of Service2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow denial of service2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities2026-07-31
- medium[UPDATE] [medium] Linux Kernel: Multiple vulnerabilities allow unspecified attack2026-07-31