CVE-2021-25487

7.3 HIGH 0.6% exploit odds exploited in the wild Fix listed Memory safety Device

What it is

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.

At a glance

Exploitability: Can be exploited locally on the machine with a low-privilege account. High risk of data exposure.
In the wild: CISA lists this as exploited in real attacks. Treat as urgent.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2021-01-19 00:00 UTC ReservedThe CVE id was reserved by its CNA
2021-10-06 18:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2023-06-29 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
2023-07-20 Remediation deadlineCISA's due date for federal agencies to fix it
2026-06-17 03:42 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
Exploit odds: 0.6% in the next 30 days (EPSS).
Severity: 7.3 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2021-10-06 18:15 UTC
Last modified: 2026-06-17 03:42 UTC
Added to CISA KEV: 2023-06-29
Exploit probability: 0.6% · EPSS, next 30 days
Weakness: CWE-125 · Out-of-bounds read
Record status: Analyzed

Affected

Samsung Android 8.1
Samsung Android 9.0
Samsung Android 10.0
Samsung Android 11.0

Attack profile CVSS 3.1 · 7.3

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None
Scope: Changed
Confidentiality: High
Integrity: Low
Availability: None

Raw vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2021-25487.md and follow it. Check whether this project is affected by CVE-2021-25487. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record