NVD / CVE Program· CNA qualcomm

CVE-2025-21436: Use After Free in DSP Service

HighCVSS 7.8 · v3.1—No exploit No fix recorded

Noroxi assessment

Priority: Monitor (action score 31/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.10% (FIRST EPSS).
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Memory corruption may occur while initiating two IOCTL calls simultaneously to create processes from two different threads.

Memory safety

Published: Apr 7, 2025
Updated: Jun 17, 2026
EPSS: 0.1% · 1th percentile
CWE: CWE-416

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · qualcomm: 7.8; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
qualcomm	fastconnect 7800 firmware	cpe:2.3:o:qualcomm:fastconnect_7800_firmware
qualcomm	fastconnect 7800	cpe:2.3:h:qualcomm:fastconnect_7800
qualcomm	qmp1000 firmware	cpe:2.3:o:qualcomm:qmp1000_firmware
qualcomm	qmp1000	cpe:2.3:h:qualcomm:qmp1000
qualcomm	sm8735 firmware	cpe:2.3:o:qualcomm:sm8735_firmware
qualcomm	sm8735	cpe:2.3:h:qualcomm:sm8735
qualcomm	sm8750 firmware	cpe:2.3:o:qualcomm:sm8750_firmware
qualcomm	sm8750	cpe:2.3:h:qualcomm:sm8750
qualcomm	sm8750p firmware	cpe:2.3:o:qualcomm:sm8750p_firmware
qualcomm	sm8750p	cpe:2.3:h:qualcomm:sm8750p
qualcomm	snapdragon 8 gen 3 mobile platform firmware	cpe:2.3:o:qualcomm:snapdragon_8_gen_3_mobile_platform_firmware
qualcomm	snapdragon 8 gen 3 mobile platform	cpe:2.3:h:qualcomm:snapdragon_8_gen_3_mobile_platform

and 38 more

Versions reported by the vendor

Affected version ranges reported by the assigning authority (qualcomm). Independent of NVD's CPE analysis and usually ahead of it.

Qualcomm, Inc. Snapdragon
- FastConnect 7800, QMP1000, SM8735, SM8750, SM8750P, Snapdragon 8 Gen 3 Mobile Platform, Snapdragon W5+ Gen 1 Wearable Platform, SW5100, SW5100P, SXR2330P, WCD9378, WCD9380 … (+13)affected

Affected versions · NVD (20)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

qualcomm fastconnect 7800 firmwareall versions
qualcomm qmp1000 firmwareall versions
qualcomm sm8735 firmwareall versions
qualcomm sm8750 firmwareall versions
qualcomm sm8750p firmwareall versions
qualcomm snapdragon 8 gen 3 mobile platform firmwareall versions
qualcomm snapdragon w5+ gen 1 wearable platform firmwareall versions
qualcomm sw5100 firmwareall versions
qualcomm sw5100p firmwareall versions
qualcomm sxr2330p firmwareall versions
qualcomm wcd9378 firmwareall versions
qualcomm wcd9380 firmwareall versions
qualcomm wcd9390 firmwareall versions
qualcomm wcd9395 firmwareall versions
qualcomm wcn7750 firmwareall versions
qualcomm wcn7860 firmwareall versions
qualcomm wcn7861 firmwareall versions
qualcomm wcn7880 firmwareall versions
qualcomm wcn7881 firmwareall versions
qualcomm wsa8830 firmwareall versions

Same product

qualcomm: all records

Other highest-scoring records for the same primary product.

CVE-2025-47373Out-of-bounds Write in Automotive
31Monitor
CVE-2025-47352Improper Validation of Array Index in Audio
31Monitor
CVE-2025-47329Release of Invalid Pointer or Reference in Android Core
31Monitor

Published before and after this one in the same product

← EarlierCVE-2024-53025Mar 3, 2025 · Integer Overflow or Wraparound in BT Controller
22Monitor
← EarlierCVE-2024-43065Apr 7, 2025 · Exposed Dangerous Method or Function in HLOS
28Monitor
Later →CVE-2025-21441Apr 7, 2025 · Out-of-bounds Read in Windows WLAN Host
31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2024-4558329 days apartUse After Free in Secure Processor
31Monitor
CVE-2024-3841263 days apartUse After Free in Computer Vision
31Monitor
CVE-2025-2705692 days apartUse After Free in DSP Service
31Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log (0)

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

docs.qualcomm.com/product/publicresources/securitybulletin/april-2025-bulletin.html

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records