CVE-2025-21449: Transient DOS may occur while processing malformed length field in SSID IEs.

Routine

HIGH 7.5REMOTEMITIGATEMITIGATEMITIGATE

CVE-2025-21449 is a high-severity flaw (CVSS 7.5) affecting sm8635p firmware, sm8650q firmware, sm8735 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Transient DOS may occur while processing malformed length field in SSID IEs.

Why this priority

High severity
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-126, CWE-125
Published	2025-07-08
Last modified	2026-06-17

Publisher (CNA): Qualcomm, Inc. · Vendor: qualcomm

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

Am I affected?

Timeline

2025-07-08 13:15 UTCPublished CVE record published
2026-06-17 08:43 UTCUpdated Record last modified

qualcomm sm8635p firmware 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.

qualcomm sm8650q firmware 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.

qualcomm sm8735 firmware 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.

qualcomm sm8750 firmware 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.

qualcomm sm8750p firmware 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.

qualcomm smart audio 200 platform firmware 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-2025-21449?

sm8635p firmware: mitigate or apply the listed mitigation; sm8650q firmware: mitigate or apply the listed mitigation; sm8735 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-21449 being exploited?

CVE-2025-21449 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-2025-21449 affect?

CVE-2025-21449 affects sm8635p firmware, sm8650q firmware, sm8735 firmware. Severity is high (CVSS 7.5). Transient DOS may occur while processing malformed length field in SSID IEs.

How urgent is CVE-2025-21449?

Priority 35/100. High severity; Remotely exploitable, no login, no user action

Software pages

Qualcomm vulnerabilities

Related CVEs

CVE-2026-21385 HIGH 7.8 EXPLOITED MITIGATE MITIGATE Qualcomm Multiple Chipsets Memory Corruption Vulnerability
CVE-2024-45549 HIGH 7.7 MITIGATE MITIGATE Information disclosure while creating MQ channels.

References

← Back to latest CVEs