CVE-2025-39869

Kernel crash via undersized EDMA queue allocation

Published Sep 23, 2025 · Updated Sep 23, 2025

Out-of-bounds memory access in the Linux TI EDMA driver allows local users to crash ARM systems during driver probing. The edma_setup_from_hw function allocates each queue_priority_map element with sizeof(s8) even though each element contains two s8 values, then writes both indexes beyond the allocation. Reachability requires TI EDMA hardware and driver probing; the documented BeagleBoard-X15 failure is a kernel crash caused when memory corruption meets Clang hardening.

CVSS severity8.4
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds memory access in the Linux TI EDMA driver allows local users to crash ARM systems during driver probing. The edma_setup_from_hw function allocates each queue_priority_map element with sizeof(s8) even though each element contains two s8 values, then writes both indexes beyond the allocation. Reachability requires TI EDMA hardware and driver probing; the documented BeagleBoard-X15 failure is a kernel crash caused when memory corruption meets Clang hardening.

The record

CVE
CVE-2025-39869
Published
Sep 23, 2025
Updated
Sep 23, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 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=2b6b3b7420190888793c49e97276e1e73bd7eaed <069fd1688c57c0cc8a3de64d108579b31676f74b
  2. Affected versionversion=2b6b3b7420190888793c49e97276e1e73bd7eaed <1baed10553fc8b388351d8fc803e3ae6f1a863bc
  3. Affected versionversion=2b6b3b7420190888793c49e97276e1e73bd7eaed <5e462fa0dfdb52b3983cf41532d3d4c7d63e2f93
  4. Affected versionversion=2b6b3b7420190888793c49e97276e1e73bd7eaed <d5e82f3f2c918d446df46e8d65f8083fd97cdec5
  5. Affected versionversion=2b6b3b7420190888793c49e97276e1e73bd7eaed <e63419dbf2ceb083c1651852209c7f048089ac0f
  6. Affected versionversion=4.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2b6b3b7420190888793c49e97276e1e73bd7eaed <069fd1688c57c0cc8a3de64d108579b31676f74b; version=2b6b3b7420190888793c49e97276e1e73bd7eaed <1baed10553fc8b388351d8fc803e3ae6f1a863bc; version=2b6b3b7420190888793c49e97276e1e73bd7eaed <5e462fa0dfdb52b3983cf41532d3d4c7d63e2f93; version=2b6b3b7420190888793c49e97276e1e73bd7eaed <d5e82f3f2c918d446df46e8d65f8083fd97cdec5; version=2b6b3b7420190888793c49e97276e1e73bd7eaed <e63419dbf2ceb083c1651852209c7f048089ac0f; version=4.4

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
8.4LinuxCVSS:3.1/AV:L/AC:L/PR:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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