What is CVE-2021-25435?

CVE-2021-25435 is a critical-severity vulnerability in Linux Tizen, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2021-07-08.

How severe is CVE-2021-25435?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-25435 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Improper input validation in Linux Tizen

CVE-2021-25435

Improper input validation vulnerability in Tizen bootloader prior to Firmware update JUL-2021 Release allows arbitrary code execution using recovery partition in wireless firmware download mode.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.017 (73.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux Tizen
Samsung Mobile Tizen Wearable Devices — versions Tizen 5.5

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

References

mobile.security@samsung.com (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-25435?: CVE-2021-25435 is a critical-severity vulnerability in Linux Tizen, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2021-07-08.
How severe is CVE-2021-25435?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-25435 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.