CVE-2026-98323 — CVE-2026-98323 | In the Linux kernel, the following vulnerability has been resolved: RDM… — CVE & Security Advisory Radar

🎯 CVE-2026-98323 🇪🇺 EUVD

💬 0 Diskussion 📄 .md Alle CVEs anzeigen ✕

CVE-2026-98323 | In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Bound fragmented header copies by the remaining length siw_get_hdr() can receive an extended DDP/RDMAP header across more than one TCP callback. The first callback may receive most of the header, while the next one still limits the copy to hdrlen - MIN_DDP_HDR instead of the number of missing bytes. This makes the destination move past the end of the header and overwrite the recei

In the Linux kernel, the following vulnerability has been resolved:

RDMA/siw: Bound fragmented header copies by the remaining length

siw_get_hdr() can receive an extended DDP/RDMAP header across more than
one TCP callback. The first callback may receive most of the header,
while the next one still limits the copy to hdrlen - MIN_DDP_HDR instead
of the number of missing bytes. This makes the destination move past the
end of the header and overwrite the receive state, including
fpdu_part_rcvd. A later callback can then use a negative fpdu_part_rcvd
value as a copy offset, which creates an OOB write.

Use the number of header bytes already received when calculating the
next copy length.

Klassifikation & Betroffenheit:

Linux Linux patch: 6.1.189Linux patch: 5.10.271Linux 754209850df8367c954ac1de7671c7430b1f342c <eb4d7a946970469b3ab0c762432bf161d5b0836cLinux 754209850df8367c954ac1de7671c7430b1f342c <262dcd809723723ed8a4e05437ec7e9c21a8f17eLinux 6.1Linux 754209850df8367c954ac1de7671c7430b1f342c <b72dcfb9bf1f0f0147cda03dc59e4002a315067fLinux patch: 5.15.222Linux 5.10.150 <5.10.271

Improper Control of Generation of Code ('Code Injection') 🎯 Medium

The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

🛡️ Empfohlene Mitigation: Refactor your program so that you do not have to dynamically generate code.

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-35 · Leverage Executable Code in Non-Executab… (Very High) CAPEC-77 · Manipulating User-Controlled Variables (Very High) CAPEC-242 · Code Injection (High)

🎯 ATT&CK-Techniken (Kill-Chain-Verhalten):

T1027.006 · Obfuscated Files or Information: H… T1027.009 · Obfuscated Files or Information: E… T1564.009 · Hide Artifacts: Resource Forking

🧩 Ähnliche Schwachstellen (Hersteller/Klasse/Score-Band):

CVE-2026-74705 10.0 CVE-2026-74612 10.0 CVE-2026-74475 10.0 CVE-2026-74309 10.0 CVE-2026-74280 10.0

🩹 Patch verfügbar (OSV):

🩹 Kernel ≥ 5.10.271 🩹 Kernel ≥ 5.15.222 🩹 Kernel ≥ 6.1.189 🩹 Kernel ≥ 6.6.158 🩹 Kernel ≥ 6.12.112 🩹 Kernel ≥ 6.18.54

🇩🇪 BSI-Sicherheitshinweise: BSI · mittel · Linux Kernel: Mehrere Schwachstellen ↗

📚 Referenzen & Quellen:

🇪🇺 Original-Eintrag (ENISA EUVD) 🇺🇸 NVD-Eintrag

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 10/2026

Heute 09.10.

CVSS-Vektor-Analyse: 9.8

AV · Angriffsvektor Netzwerk

AC · Komplexität Gering

PR · Privilegien Keine

UI · Interaktion Keine

S · Scope Unverändert

C · Vertraulichkeit Hoch

I · Integrität Hoch

A · Verfügbarkeit Hoch

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CNA-Bewertung (Linux): 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Veröffentlicht:06.10.2026

Aktualisiert:07.10.2026 07:17

Assigner (CNA):Linux

EUVD-ID:EUVD-2026-93308

Quellen: 🇪🇺 EUVD-Datenbank (ENISA) + 🇺🇸 NVD-Anreicherung · 24-h-Cache

CWE-94: Code Injection ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Kernel-Paket aktualisieren (apt upgrade linux-image / yum update kernel) und System neu starten.

Tier	CVEs	Anteil
≥90 %	720	0,2 %
≥50 %	3.223	0,9 %
≥10 %	22.114	6,0 %
<10 %	341.998	92,9 %

9.8 CRITICAL

EPSS

0.6%

CVE-2026-98323 🌐 Netzwerk (Remote) 🔓 Keine Authentifizierung nötig

Linux

CVE-2026-98323 | In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Bound fragmented header copies by the remaining length siw_get_hdr() can receive an extended DDP/RDMAP header across more than one TCP callback. The first callback may receive most of the header, while the next one still limits the copy to hdrlen - MIN_DDP_HDR instead of the number of missing bytes. This makes the destination move past the end of the header and overwrite the recei

CWE-94: Code Injection ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Kernel-Paket aktualisieren (apt upgrade linux-image / yum update kernel) und System neu starten.

06.10.2026

🛡️ Details ➔

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