CVE-2023-21489 Memory corruption in Samsung Mobile Devices

What is CVE-2023-21489?

CVE-2023-21489 is a high-severity memory corruption vulnerability in Samsung Android, published on 4 May 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Heap out-of-bounds write vulnerability in bootloader prior to SMR May-2023 Release 1 allows a physical attacker to execute arbitrary code.

Weakness: CWE-787

Which versions are affected by CVE-2023-21489?

It affects 1 product.

Products include Samsung Android.

How do I fix CVE-2023-21489?

No fix has been published for CVE-2023-21489 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-2023-21489 being exploited?

There is no known exploitation of CVE-2023-21489 in the wild and no public exploit code.

Other vulnerabilities in Samsung Android

• CVE-2025-21042 Samsung Mobile Devices Out-of-Bounds Write Exploited High 8.8
• CVE-2025-21043 Samsung Mobile Devices Out-of-Bounds Write Exploited High 8.8
• CVE-2021-25487 Samsung Mobile Devices Out-of-Bounds Read Exploited High 7.3
• CVE-2021-25394 Samsung Mobile Devices Race Condition Exploited Medium 6.4
• CVE-2021-25395 Samsung Mobile Devices Race Condition Exploited Medium 6.4

All Samsung Android vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-jqmg-5jqp-94q9.