How severe is CVE-2023-21503?

CVE-2023-21503 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2023-21503 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-21503?

CVE-2023-21503 primarily affects Samsung Android. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-21503?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-21503 published?

CVE-2023-21503 was published on 2023-05-04 and last updated on 2026-06-17.

CVE-2023-21503

CVE-2023-21503 is a medium-severity vulnerability in Samsung Android with a CVSS 3.x base score of 5.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: Medium (CVSS 3.x base score 5.6)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Samsung Android
Published: 2023-05-04
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2023-21503?: Potential buffer overflow vulnerability in mm_LteInterRatManagement.c in Shannon baseband prior to SMR May-2023 Release 1 allows remote attackers to cause invalid memory access.
How severe is CVE-2023-21503?: CVE-2023-21503 has a CVSS 3.x base score of 5.6, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2023-21503 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-21503?: CVE-2023-21503 primarily affects Samsung Android. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-21503?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-21503 published?: CVE-2023-21503 was published on 2023-05-04 and last updated on 2026-06-17.

References

https://security.samsungmobile.com/securityUpdate.smsb?year=2023&month=05

Affected products (8)

cpe:2.3:o:samsung:android:13.0:-:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-apr-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-dec-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-feb-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-jan-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-mar-2023-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-nov-2022-r1:*:*:*:*:*:*
cpe:2.3:o:samsung:android:13.0:smr-oct-2022-r1:*:*:*:*:*:*

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