CVE-2026-74565

🎯 CVE-2026-74565 🇪🇺 EUVD

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CVE-2026-74565 | In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: make nft_object rhltable per table The nft_object rhltable is global, this allows for accessing objects that are being dismangled from lookup path by other existing netns. Given the nft_obj_destroy() releases the object inmediately, this might lead to use-after-free of these objects that are being released. Make the existing rhltable per table to address this issue to

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

netfilter: nf_tables: make nft_object rhltable per table

The nft_object rhltable is global, this allows for accessing objects
that are being dismangled from lookup path by other existing netns.
Given the nft_obj_destroy() releases the object inmediately, this might
lead to use-after-free of these objects that are being released.
Make the existing rhltable per table to address this issue to deal with
with the nft_rcv_nl_event() path too.

Update nft_obj_lookup() to take the table as non-const, otherwise,
compiler complains when passing the objname_ht to rhltable_lookup().

Klassifikation & Betroffenheit:

Linux Linux patch: 6.18.44Linux patch: 7.2Linux 4d44175aa5bb5f68772b1eb0306554812294ca52 <523c881661dde67efb44fce38c8eed50a72a57c1Linux patch: 6.6.160Linux patch: 6.1.188Linux 4d44175aa5bb5f68772b1eb0306554812294ca52 <4b549d32d34ee765527e63726bb1af984876e776Linux patch: 5.10.270Linux 4d44175aa5bb5f68772b1eb0306554812294ca52 <71714a2cec6c6d79bbd425ad968f9d6a3e4a2066

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-2026-99999 9.3 CVE-2026-90049 9.3 CVE-2026-89930 9.3 CVE-2026-89918 9.3 CVE-2026-89916 9.3

🩹 Patch verfügbar (OSV):

🩹 Kernel ≥ 5.10.270 🩹 Kernel ≥ 6.1.188 🩹 Kernel ≥ 6.6.160 🩹 Kernel ≥ 6.12.103 🩹 Kernel ≥ 6.18.44 🩹 Kernel ≥ 7.1.8

📰 Eigene Berichterstattung: ➔ CVE-2026-74565 | Linux Kernel up to 6.12.102/6.18.43/7.1.7/7.2-rc5 nf_tables nft

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

📚 Referenzen & Quellen:

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

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 08/2026

Heute 22.10.

CVSS-Vektor-Analyse: 7.8

AV · Angriffsvektor Lokal

AC · Komplexität Gering

PR · Privilegien Gering

UI · Interaktion Keine

S · Scope Unverändert

C · Vertraulichkeit Hoch

I · Integrität Hoch

A · Verfügbarkeit Hoch

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

CNA-Bewertung (Linux): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Veröffentlicht:15.08.2026

Aktualisiert:21.10.2026 13:19

Assigner (CNA):Linux

EUVD-ID:EUVD-2026-59630

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 %	725	0,2 %
≥50 %	3.224	0,9 %
≥10 %	22.086	5,9 %
<10 %	346.717	93,0 %

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