CVE-2026-89817 — CVE & Security Advisory Radar

🎯 CVE-2026-89817 🇪🇺 EUVD

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CVE-2026-89817 | In the Linux kernel, the following vulnerability has been resolved: drm/gud: NUL-terminate TV mode names read from the device gud_connector_add_tv_mode() reads a buffer of fixed-size mode names from the USB device and passes pointers into it to drm_mode_create_tv_properties_legacy(), which calls strlen() on each one. Nothing guarantees the device NUL-terminates a name, so strlen() can run past the end of a slot and, for the last mode, past the end of the al

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

drm/gud: NUL-terminate TV mode names read from the device

gud_connector_add_tv_mode() reads a buffer of fixed-size mode names from
the USB device and passes pointers into it to
drm_mode_create_tv_properties_legacy(), which calls strlen() on each one.
Nothing guarantees the device NUL-terminates a name, so strlen() can run
past the end of a slot and, for the last mode, past the end of the
allocation.

Terminate each name at the end of its slot before use.

Klassifikation & Betroffenheit:

Linux Linux 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <89210cb5ff8fdbe055c97ac688be2268f6c815aeLinux patch: 6.6.157Linux patch: 7.2.5Linux patch: 6.18.51Linux patch: 7.3-rc2Linux 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <9096edfd6f2edbc79612b482547e0972edbcfe4bLinux 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <d0f3312f7800eb0e00d1264f66104c788f43dd69Linux 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 <08c8ec28547987e55a90c662f8795e05c2925498

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-2021-47476 4.6 CVE-2024-24857 4.6 CVE-2024-24858 4.6 CVE-2024-24859 4.6 CVE-2024-24860 4.6

🩹 Patch verfügbar (OSV):

🩹 Kernel ≥ 5.15.221 🩹 Kernel ≥ 6.1.188 🩹 Kernel ≥ 6.6.157 🩹 Kernel ≥ 6.12.110 🩹 Kernel ≥ 6.18.51 🩹 Kernel ≥ 7.2.5

📰 Eigene Berichterstattung: ➔ CVE-2026-89817 | Linux Kernel up to 7.3-rc1 gud gud_drv.c gud_connector_add_tv_m

📚 Referenzen & Quellen:

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

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 09/2026

Heute 18.09.

Veröffentlicht:16.09.2026

Aktualisiert:16.09.2026 11:16

Assigner (CNA):Linux

EUVD-ID:EUVD-2026-80417

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	2026-08-30	2026-09-18
≥90 %	0	0
≥50 %	0	0
≥10 %	0	0
<10 %	300	300

EPSS

3.7%

CVE-2026-89817 💻 Lokal 🔓 Keine Authentifizierung nötig

Linux

CVE-2026-89817 | In the Linux kernel, the following vulnerability has been resolved: drm/gud: NUL-terminate TV mode names read from the device gud_connector_add_tv_mode() reads a buffer of fixed-size mode names from the USB device and passes pointers into it to drm_mode_create_tv_properties_legacy(), which calls strlen() on each one. Nothing guarantees the device NUL-terminates a name, so strlen() can run past the end of a slot and, for the last mode, past the end of the al

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

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

16.09.2026

🛡️ Details ➔

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