CVE-2025-27056

Memory corruption via uncounted DMA operations

Published Jul 8, 2025 · Updated Jul 8, 2025

Use-after-free in Qualcomm Snapdragon DSP Service allows local users to corrupt memory during subsystem restart cleanup. The fastrpc_dev_map_dma and unmap paths fail to increment invoke_cnt, so rpmsg_remove can free pending_ctx while a concurrent DMA operation still accesses it. Exploitation requires low local privileges and no user interaction; the public record does not specify the operation available after corruption.

CVSS severity7.8
High
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Qualcomm Snapdragon DSP Service allows local users to corrupt memory during subsystem restart cleanup. The fastrpc_dev_map_dma and unmap paths fail to increment invoke_cnt, so rpmsg_remove can free pending_ctx while a concurrent DMA operation still accesses it. Exploitation requires low local privileges and no user interaction; the public record does not specify the operation available after corruption.

The record

CVE
CVE-2025-27056
Published
Jul 8, 2025
Updated
Jul 8, 2025
Vendor
Qualcomm
Product
Snapdragon
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=FastConnect 7800
  2. Affected versionversion=QMP1000
  3. Affected versionversion=SM8735
  4. Affected versionversion=SM8750
  5. Affected versionversion=SM8750P
  6. Affected versionversion=Snapdragon 8 Gen 3 Mobile Platform
  7. Affected versionversion=Snapdragon W5+ Gen 1 Wearable Platform
  8. Affected versionversion=SW5100
  9. Affected versionversion=SW5100P
  10. Affected versionversion=SXR2330P
  11. Affected versionversion=WCD9378
  12. Affected versionversion=WCD9380
  13. Affected versionversion=WCD9390
  14. Affected versionversion=WCD9395
  15. Affected versionversion=WCN7750
  16. Affected versionversion=WCN7860
  17. Affected versionversion=WCN7861
  18. Affected versionversion=WCN7880
  19. Affected versionversion=WCN7881
  20. Affected versionversion=WSA8830
  21. Affected versionversion=WSA8832
  22. Affected versionversion=WSA8835
  23. Affected versionversion=WSA8840
  24. Affected versionversion=WSA8845
  25. Affected versionversion=WSA8845H

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Qualcomm · Snapdragonversion=FastConnect 7800; version=QMP1000; version=SM8735; version=SM8750; version=SM8750P; version=Snapdragon 8 Gen 3 Mobile Platform; version=Snapdragon W5+ Gen 1 Wearable Platform; version=SW5100; version=SW5100P; version=SXR2330P; version=WCD9378; version=WCD9380; version=WCD9390; version=WCD9395; version=WCN7750; version=WCN7860; version=WCN7861; version=WCN7880; version=WCN7881; version=WSA8830; version=WSA8832; version=WSA8835; version=WSA8840; version=WSA8845; version=WSA8845H

Published CVSS scores

7.8Qualcomm, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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