CVE-2025-20678: In ims service, there is a possible system crash due to incorrect error handling

Routine

MEDIUM 6.5MITIGATEMITIGATEMITIGATE

CVE-2025-20678 is a medium-severity flaw (CVSS 6.5) affecting lr12a, lr13, nr15. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In ims service, there is a possible system crash due to incorrect error handling. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01394606; Issue ID: MSV-2739.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-674
Published	2025-06-02
Last modified	2026-06-17

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

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-06-02 03:15 UTCPublished CVE record published
2026-06-17 08:41 UTCUpdated Record last modified

mediatek lr12a MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

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.

mediatek lr13 MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

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.

mediatek nr15 MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

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.

mediatek nr16 MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

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.

mediatek nr17 MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

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.

mediatek nr17r MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

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-2025-20678?

lr12a: mitigate or apply the listed mitigation; lr13: mitigate or apply the listed mitigation; nr15: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-20678 being exploited?

CVE-2025-20678 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-2025-20678 affect?

CVE-2025-20678 affects lr12a, lr13, nr15. Severity is medium (CVSS 6.5). In ims service, there is a possible system crash due to incorrect error handling. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges

How urgent is CVE-2025-20678?

Priority 30/100. No elevated risk signals yet.

Related CVEs

CVE-2026-20434 HIGH 7.5 MITIGATE MITIGATE In Modem, there is a possible out of bounds write due to a missing bounds check
CVE-2025-20727 HIGH 8.1 MITIGATE MITIGATE In Modem, there is a possible out of bounds write due to a heap buffer overflow
CVE-2025-20726 HIGH 7.5 MITIGATE MITIGATE In Modem, there is a possible out of bounds write due to an incorrect bounds check
CVE-2025-20725 HIGH 7.5 MITIGATE MITIGATE In ims service, there is a possible out of bounds write due to a missing bounds check
CVE-2024-20154 HIGH 8.8 MITIGATE MITIGATE In Modem, there is a possible out of bounds write due to a missing bounds check

References

← Back to latest CVEs