CVE-2025-20721: In imgsensor, there is a possible out of bounds write due to a missing bounds check

Routine

HIGH 7.8DOWNGRADEMITIGATE

CVE-2025-20721 is a high-severity flaw (CVSS 7.8) affecting iot yocto, android. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In imgsensor, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10089545; Issue ID: MSV-4279.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 100%)
CISA exploited list	No
Weakness	CWE-787
Published	2025-10-14
Last modified	2026-10-08

Publisher (CNA): MediaTek, Inc. · Vendor: google · mediatek

Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-14 10:15 UTCPublished CVE record published
2026-10-08 12:10 UTCUpdated Record last modified

mediatek iot yocto DOWNGRADE

Affected: 25.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 25.0

1. Check installed version

apt-cache policy iot-yocto || rpm -q iot-yocto || iot-yocto --version

2. No fixed release: DOWNGRADE to a release before 25.0 (Debian / Ubuntu)

apt-cache madison iot-yocto sudo apt install iot-yocto=<VERSION_BEFORE_25.0> sudo apt-mark hold iot-yocto

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list iot-yocto sudo dnf downgrade iot-yocto-<VERSION_BEFORE_25.0> sudo dnf versionlock add iot-yocto

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

google android MITIGATE

Affected: 13.0 · 14.0 · 15.0 · 16.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 13.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-20721?

iot yocto: downgrade or apply the listed mitigation; android: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-20721 being exploited?

CVE-2025-20721 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-20721 affect?

CVE-2025-20721 affects iot yocto, android. Severity is high (CVSS 7.8). In imgsensor, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploit

How urgent is CVE-2025-20721?

Priority 27/100. High severity

Software pages

Android vulnerabilities

Related CVEs

CVE-2024-20100 CRITICAL 9.8 DOWNGRADE UPGRADE In wlan driver, there is a possible out of bounds write due to improper input validation
CVE-2024-20055 MEDIUM 6.3 DOWNGRADE DOWNGRADE In imgsys, there is a possible information disclosure due to a missing bounds check
CVE-2023-32829 MEDIUM 6.7 DOWNGRADE DOWNGRADE In apusys, there is a possible out of bounds write due to an integer overflow
CVE-2023-32828 MEDIUM 6.7 DOWNGRADE MITIGATE In vpu, there is a possible out of bounds write due to an integer overflow
CVE-2023-32820 HIGH 7.5 DOWNGRADE DOWNGRADE In wlan firmware, there is a possible firmware assertion due to improper input handling

References

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