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CVE-2021-25487

Samsung Mobile Devices Out-of-Bounds Read Vulnerability

  • High 7.3
  • Exploited: added to CISA KEV 29 Jun 2023

Description

Lack of boundary checking of a buffer in set_skb_priv() of modem interface driver prior to SMR Oct-2021 Release 1 allows OOB read and it results in arbitrary code execution by dereference of invalid function pointer.

Key facts

Published
6 Oct 2021
Last changed
21 Oct 2025
Assigned by
Samsung Mobile
KEV added
29 Jun 2023
KEV fix due
20 Jul 2023
EPSS
0.635% likely to be exploited in the next 30 days, higher than 51.019% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: no; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 7.3CVSS 3.1, Highfrom the CNA (Samsung Mobile)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

What to do

  • Apply updates per vendor instructions or discontinue use of the product if updates are unavailableCISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
Samsung MobileSamsung Mobile Devices
  • O(8.1), P(9.0), Q(10.0), R(11.0) up to but excluding SMR Oct-2021 Release 1 (affected)

Timeline

  1. 6 Oct 2021 Published
  2. 29 Jun 2023 CVE-2021-25487 added to CISA KEV
  3. 29 Jun 2023 Added to the CISA KEV catalogue

Weakness

References