CVE-2023-21504 Memory corruption in Samsung Mobile Devices

What is CVE-2023-21504?

CVE-2023-21504 is a medium-severity memory corruption vulnerability in Samsung Android, published on 4 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Potential buffer overflow vulnerability in mm_Plmncoordination.c in Shannon baseband prior to SMR May-2023 Release 1 allows remote attackers to cause invalid memory access.

Weakness: CWE-120, CWE-20

Which versions are affected by CVE-2023-21504?

It affects 1 product.

Products include Samsung Android.

How do I fix CVE-2023-21504?

No fix has been published for CVE-2023-21504 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-2023-21504 being exploited?

There is no known exploitation of CVE-2023-21504 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-v49x-2x37-f22g.