CVE-2021-25395: A race condition in MFC charger driver prior to SMR MAY-2021 Release 1 allows local attackers to bypass signature check given a radio privilege is compromised.

PriorityP275medium6.4CVSS 3.1

AVLACHPRHUINSUCHIHAH

KEVITW

CISA Known Exploited Vulnerabilitydue 2023-07-20

Exploited in the wild

EPSS

0.39%

30.3th percentile

A race condition in MFC charger driver prior to SMR MAY-2021 Release 1 allows local attackers to bypass signature check given a radio privilege is compromised.

Affected

5 ranges

Vendor	Product	Version range	Fixed in
samsung	android	—	—
samsung	android	—	—
samsung	android	—	—
samsung	android	—	—
samsung_mobile	samsung_mobile_devices	>= O(8.x), P(9.0), Q(10.0), R(11.0) < SMR MAY-2021 Release 1	SMR MAY-2021 Release 1

Detection & IOCsextracted from sources · hover to see the quote

→Target the MFC charger driver in Samsung Mobile Devices; exploitation requires a race condition to be won within this driver component, resulting in a use-after-free primitive enabling an arbitrary write ↗
→Exploitation requires the attacker to already hold radio privilege (local privilege escalation chain); monitor for unexpected processes or code executing under the radio UID/privilege context on Samsung devices ↗

·Vulnerability is present only in Samsung Mobile Devices running software prior to SMR MAY-2021 Release 1; patched devices are not affected ↗
·Exploitation is constrained to local attackers who have already compromised radio privilege; this is not a remote code execution vector on its own ↗

CVSS provenance

nvdv3.16.4MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

nvdv2.04.4MEDIUMAV:L/AC:M/Au:N/C:P/I:P/A:P

vulncheck6.4MEDIUM

cisa6.4MEDIUM

CVEs like this are exactly what “Exploited This Week” covers.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.