CVE-2025-20722: In gnss driver, there is a possible out of bounds read due to an integer overflow

Routine

MEDIUM 5.5DOWNGRADEMITIGATEMITIGATE

CVE-2025-20722 is a medium-severity flaw (CVSS 5.5) affecting rdk-b, android, openwrt. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In gnss driver, there is a possible out of bounds read due to an integer overflow. This could lead to local information disclosure if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS09920036; Issue ID: MSV-3798.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.5 (Medium)
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-190
Published	2025-10-14
Last modified	2026-10-08

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

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

rdkcentral rdk-b DOWNGRADE

Affected: 2024q1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2024q1

1. Check installed version

apt-cache policy rdk-b || rpm -q rdk-b || rdk-b --version

2. No fixed release: DOWNGRADE to a release before 2024q1 (Debian / Ubuntu)

apt-cache madison rdk-b sudo apt install rdk-b=<VERSION_BEFORE_2024q1> sudo apt-mark hold rdk-b

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

dnf --showduplicates list rdk-b sudo dnf downgrade rdk-b-<VERSION_BEFORE_2024q1> sudo dnf versionlock add rdk-b

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: 14.0 · 15.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 14.0

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.

openwrt openwrt MITIGATE

Affected: 21.02.0 · 23.05

Fixed in: no fixed release known

Safe to downgrade to: a release before 21.02.0

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-2025-20722?

rdk-b: downgrade or apply the listed mitigation; android: mitigate or apply the listed mitigation; openwrt: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-20722 being exploited?

CVE-2025-20722 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-2025-20722 affect?

CVE-2025-20722 affects rdk-b, android, openwrt. Severity is medium (CVSS 5.5). In gnss driver, there is a possible out of bounds read due to an integer overflow. This could lead to local information disclosure if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitati

How urgent is CVE-2025-20722?

Priority 19/100. No elevated risk signals yet.

Software pages

Android vulnerabilities · OpenWrt vulnerabilities

Related CVEs

CVE-2025-20746 MEDIUM 6.7 DOWNGRADE DOWNGRADE In gnss service, there is a possible out of bounds write due to an incorrect bounds check
CVE-2025-20747 MEDIUM 6.7 DOWNGRADE DOWNGRADE In gnss service, there is a possible out of bounds write due to an incorrect bounds check
CVE-2026-20435 MEDIUM 4.6 DOWNGRADE DOWNGRADE In preloader, there is a possible read of device unique identifiers due to a logic error
CVE-2025-20730 MEDIUM 6.7 DOWNGRADE DOWNGRADE In preloader, there is a possible escalation of privilege due to an insecure default value
CVE-2025-20696 MEDIUM 6.8 DOWNGRADE DOWNGRADE In DA, there is a possible out of bounds write due to a missing bounds check

References

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