CVE-2025-27891 Memory corruption in n/a

Critical 9.1 Published 14 May 2025 Updated 20 May 2025

Attackers can trigger out-of-bounds reads and potential crashes by sending malformed NAS packets to vulnerable Samsung Exynos modems.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-27891?

CVE-2025-27891 is a critical memory corruption vulnerability in Samsung Exynos 1080 Firmware, published on 14 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in Samsung Mobile Processor, Wearable Processor, and Modem Exynos 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, W920, W930, W1000, Modem 5123, Modem 5300, Modem 5400. The lack of a length check leads to out-of-bounds reads via malformed NAS packets.

Weakness: CWE-125

Which versions are affected by CVE-2025-27891?

It affects 17 products.

Products include Samsung Exynos 1080 Firmware, Samsung Exynos 1280 Firmware, Samsung Exynos 1330 Firmware, Samsung Exynos 1380 Firmware, Samsung Exynos 1480 Firmware, Samsung Exynos 2100 Firmware and 11 more.

How do I fix CVE-2025-27891?

No fix has been published for CVE-2025-27891 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-27891 being exploited?

There is no known exploitation of CVE-2025-27891 in the wild and no public exploit code.

All Samsung Exynos 1080 Firmware vulnerabilities

Sources

Also known as GHSA-p2h7-5rp6-x3fx.