CVE-2021-47288 — CVE & Security Advisory Radar

🎯 CVE-2021-47288 🇪🇺 EUVD

💬 0 Diskussion 📄 .md Alle CVEs anzeigen ✕

CVE-2021-47288 | In the Linux kernel, the following vulnerability has been resolved: media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf() Fix an 11-year old bug in ngene_command_config_free_buf() while addressing the following warnings caught with -Warray-bounds: arch/alpha/include/asm/string.h:22:16: warning: '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offs

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

media: ngene: Fix out-of-bounds bug in ngene_command_config_free_buf()

Fix an 11-year old bug in ngene_command_config_free_buf() while
addressing the following warnings caught with -Warray-bounds:

arch/alpha/include/asm/string.h:22:16: warning: '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds]
arch/x86/include/asm/string_32.h:182:25: warning: '__builtin_memcpy' offset [12, 16] from the object at 'com' is out of the bounds of referenced subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds]

The problem is that the original code is trying to copy 6 bytes of
data into a one-byte size member _config_ of the wrong structue
FW_CONFIGURE_BUFFERS, in a single call to memcpy(). This causes a
legitimate compiler warning because memcpy() overruns the length
of &com.cmd.ConfigureBuffers.config. It seems that the right
structure is FW_CONFIGURE_FREE_BUFFERS, instead, because it contains
6 more members apart from the header _hdr_. Also, the name of
the function ngene_command_config_free_buf() suggests that the actual
intention is to ConfigureFreeBuffers, instead of ConfigureBuffers
(which takes place in the function ngene_command_config_buf(), above).

Fix this by enclosing those 6 members of struct FW_CONFIGURE_FREE_BUFFERS
into new struct config, and use &com.cmd.ConfigureFreeBuffers.config as
the destination address, instead of &com.cmd.ConfigureBuffers.config,
when calling memcpy().

This also helps with the ongoing efforts to globally enable
-Warray-bounds and get us closer to being able to tighten the
FORTIFY_SOURCE routines on memcpy().

Klassifikation & Betroffenheit:

Linux Linux dae52d009fc950b5c209260d50fcc000f5becd3c <8d4abca95ecc82fc8c41912fa0085281f19cc29fLinux dae52d009fc950b5c209260d50fcc000f5becd3c <ec731c6ef564ee6fc101fc5d73e3a3a953d09a00Linux dae52d009fc950b5c209260d50fcc000f5becd3c <b9a178f189bb6d75293573e181928735f5e3e070Linux dae52d009fc950b5c209260d50fcc000f5becd3c <4487b968e5eacd02c493303dc2b61150bb7fe4b2Linux patch: 5.14Linux dae52d009fc950b5c209260d50fcc000f5becd3c <c6ddeb63dd543b5474b0217c4e47538b7ffd7686Linux patch: 4.19.199Linux patch: 0

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-2026-80590 8.6 CVE-2026-68433 8.6 CVE-2026-64400 8.6 CVE-2026-53217 8.6 CVE-2026-46273 8.6

📰 Eigene Berichterstattung: ➔ CVE-2021-47288 | Linux Kernel up to 5.13.5 media string.h ngene_command_config_f

📚 Referenzen & Quellen:

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

Ausnutzungs-Zeitleiste:

Reserviert 2021

Veröffentlicht 05/2024

Heute 01.10.

CVSS-Vektor-Analyse: 7.1

AV · Angriffsvektor Lokal

AC · Komplexität Gering

PR · Privilegien Gering

UI · Interaktion Keine

S · Scope Unverändert

C · Vertraulichkeit Hoch

I · Integrität Keine

A · Verfügbarkeit Hoch

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

Veröffentlicht:21.05.2024

Aktualisiert:17.06.2026 04:17

Assigner (CNA):Linux

EUVD-ID:EUVD-2021-34293

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	2026-09-17	2026-09-30
≥90 %	0	392
≥50 %	0	1149
≥10 %	0	2
<10 %	300	424

Noch keine Analyse zu CVE-2021-47288

Beitrag zu CVE-2021-47288 verfassen

Zero-Day & Vulnerability Intelligence Hub