[UPDATE] [kritisch] Linux Kernel: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in Linux Kernel ausnutzen, um vertrauliche Informationen offenzulegen, Daten zu manipulieren, einen Denial-of-Service-Zustand zu verursachen oder seine Rechte zu erweitern.
CSIRTS triage
- What
- Multiple vulnerabilities in PJSIP pjmedia enabling remote denial-of-service attacks.
- Who is affected
- Deployments of PJSIP pjmedia vulnerable to remote DoS by anonymous attackers.
- Urgency
- Patch immediately as denial-of-service vulnerabilities can disrupt critical communication services.
- Action
- Update PJSIP to a patched version that addresses the pjmedia denial-of-service vulnerabilities.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch pjmedia
Get an email when a new pjmedia advisory drops — max one per day, one-click unsubscribe.
Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2640
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-2026-645610.35% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 28% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-645620.13% 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.
- Moderate exploitation riskCVE-2026-645641.5% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 72% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-645650.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 8% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-64561 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-64562 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-64563 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-64564 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-64565 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownMultiples vulnérabilités dans le noyau Linux de Debian LTS (11 septembre 2026)cert-fr-avis
- unknownMultiples vulnérabilités dans le noyau Linux de Red Hat (11 septembre 2026)cert-fr-avis
- unknownMultiples vulnérabilités dans le noyau Linux de SUSE (28 août 2026)cert-fr-avis
- unknownMultiple vulnerabilities in Debian LTS Linux kernel (August 21, 2026)cert-fr-avis
- unknownMultiple vulnerabilities in SUSE Linux kernel (August 21, 2026)cert-fr-avis
- unknownMultiple vulnerabilities in Debian Linux kernel (August 14, 2026)cert-fr-avis
- unknownexploitedMultiple vulnerabilities in SUSE Linux kernel (August 14, 2026)cert-fr-avis
- mediumCVE-2026-64563: rhashtable: clear stale iter->p on table restartmsrc
- criticalCVE-2026-64564: sctp: don't free the ASCONF's own transport in DEL-IP processingmsrc
- criticalCVE-2026-64562: KVM: nVMX: Hide shadow VMCS right after VMCLEARmsrc
- mediumCVE-2026-64561: KVM: x86: Check for invalid/obsolete root *after* making MMU pages availablemsrc
- criticalCVE-2026-64565: Input: ims-pcu - fix heap-buffer-overflow in ims_pcu_process_data()msrc
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.
- medium[UPDATE] [mittel] Linux Kernel: Schwachstelle ermöglicht Denial of Servicecert-bund · 2026-09-11
- mediumexploited[UPDATE] [mittel] Linux Kernel: Mehrere Schwachstellencert-bund · 2026-09-11
- high[UPDATE] [hoch] Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Servicecert-bund · 2026-09-11
- low[UPDATE] [niedrig] Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Servicecert-bund · 2026-09-11
- medium[UPDATE] [mittel] Linux Kernel: Mehrere Schwachstellencert-bund · 2026-09-11
- medium[UPDATE] [mittel] Linux Kernel: Mehrere Schwachstellencert-bund · 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