CVE-2026-43494 — CVE & Security Advisory Radar

🎯 CVE-2026-43494 HIGH 7.8 🔥 EPSS 30% 🧪 PoC 🇪🇺 EUVD

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CVE-2026-43494 | In the Linux kernel, the following vulnerability has been resolved: net/rds: reset op_nents when zerocopy page pin fails When iov_iter_get_pages2() fails in rds_message_zcopy_from_user(), the pinned pages are released with put_page(), and rm->data.op_mmp_znotifier is cleared. But we fail to properly clear rm->data.op_nents. Later when rds_message_purge() is called from rds_sendmsg() the cleanup loop iterates over the incorrectly non zero number of op_nent

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

net/rds: reset op_nents when zerocopy page pin fails

When iov_iter_get_pages2() fails in rds_message_zcopy_from_user(),
the pinned pages are released with put_page(), and
rm->data.op_mmp_znotifier is cleared. But we fail to properly
clear rm->data.op_nents.

Later when rds_message_purge() is called from rds_sendmsg() the
cleanup loop iterates over the incorrectly non zero number of
op_nents and frees them again.

Fix this by properly resetting op_nents when it should be in
rds_message_zcopy_from_user().

Klassifikation & Betroffenheit:

Linux Linux 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 <03014551938a0887fa55f18ce49b70158a9c0113Linux patch: 7.0.10Linux 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 <640e37f58f991546a87540d067279c2c1fa9fe51Linux 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 <290e833d1acb1093bc121fcdc97f5e6161157479Linux patch: 6.1.175Linux 4.17Linux 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 <9115669faedccdda100428e2d26fd0aac8c50799Linux 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 <c6e51512a784c4a7b86e1a044988696e3b3721fa

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-2026-74573 9.3 CVE-2026-74568 9.3 CVE-2026-74517 9.3 CVE-2026-74439 9.3 CVE-2026-74310 9.3

🧪 Exploit-Evidenz:

🐙 suominen/pintheft 🐙 0xBlackash/CVE-2026-43494 🐙 Kagantua/PinTheft-go 🐙 jayhutajulu1/CVE-2026-43494-PinT 🐙 tanzz1337/CVE-2026-43494-PinThef

🩹 Patch verfügbar (OSV):

🩹 Kernel ≥ 5.10.258 🩹 Kernel ≥ 5.15.209 🩹 Kernel ≥ 6.1.175 🩹 Kernel ≥ 6.6.141 🩹 Kernel ≥ 6.12.91 🩹 Kernel ≥ 6.18.33

📚 Referenzen & Quellen:

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

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 05/2026

Heute 05.09.

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

Veröffentlicht:21.05.2026

Aktualisiert:05.08.2026 12:28

Assigner (CNA):Linux

EUVD-ID:EUVD-2026-31267

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

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

Tier	2026-08-29	2026-09-05
≥90 %	4	0
≥50 %	4	0
≥10 %	3	0
<10 %	304	300

7.8 HIGH

🇪🇺 EUVD

EPSS

30%

CVE-2026-43494 💻 Lokal 🔑 Geringe Nutzerrechte nötig

🧪 Linux

CVE-2026-43494 | In the Linux kernel, the following vulnerability has been resolved: net/rds: reset op_nents when zerocopy page pin fails When iov_iter_get_pages2() fails in rds_message_zcopy_from_user(), the pinned pages are released with put_page(), and rm->data.op_mmp_znotifier is cleared. But we fail to properly clear rm->data.op_nents. Later when rds_message_purge() is called from rds_sendmsg() the cleanup loop iterates over the incorrectly non zero number of op_nent

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

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

21.05.2026

🛡️ Details ➔

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