[UPDATE] [mittel] Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

CSIRTS triage

What

Multiple vulnerabilities in the Linux Kernel allow local attackers to perform unspecified attacks.

Who is affected

Local users on systems running affected Linux Kernel versions are at risk.

Urgency

Medium urgency; unspecified attack surface warrants timely remediation to reduce exposure.

Action

Apply Linux Kernel patches for the listed CVEs.

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

Details

Source

CERT-Bund (BSI) Security Advisories (DE · national-cert · site)

Severity

medium

Published

2026-09-09

Exploitation

Not in CISA KEV at last sync

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2024-1418

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-2021-475760.26% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2021-475770.15% 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-2021-475780.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2021-475790.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2021-475800.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 16% of all EPSS-scored CVEs.
• Low exploitation riskCVE-2021-475820.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% 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.

• unknownMultiples vulnérabilités dans le noyau Linux de Red Hat (11 septembre 2026)cert-fr-avis

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.

• unknownCVE-2026-89773: In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Skip Upda…nvd · 2026-09-11
• unknownCVE-2026-89772: In the Linux kernel, the following vulnerability has been resolved: btrfs: write-protect folio…nvd · 2026-09-11
• unknownCVE-2026-89771: In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Fix subbuf re…nvd · 2026-09-11
• unknownCVE-2026-89770: In the Linux kernel, the following vulnerability has been resolved: iomap: don't free integrit…nvd · 2026-09-11
• unknownCVE-2026-89769: In the Linux kernel, the following vulnerability has been resolved: clocksource/drivers/nxp-pi…nvd · 2026-09-11
• unknownCVE-2026-89768: In the Linux kernel, the following vulnerability has been resolved: fs: fix user path of neste…nvd · 2026-09-11

More from CERT-Bund (BSI) Security Advisories

• high[UPDATE] [hoch] Red Hat Enterprise Linux (postgis, virtuoso-opensource): Mehrere Schwachstellen2026-09-11
• medium[UPDATE] [mittel] Red Hat Enterprise Linux: Mehrere Schwachstellen2026-09-11
• medium[UPDATE] [mittel] Linux Kernel: Schwachstelle ermöglicht Denial of Service2026-09-11
• medium[UPDATE] [mittel] Linux Kernel: Mehrere Schwachstellen2026-09-11
• high[UPDATE] [hoch] OpenSSL: Mehrere Schwachstellen2026-09-11