CVE-2025-39869: dmaengine: ti: edma: Fix memory allocation size for queue_priority_map

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-09-23 · updated 2026-10-19
Weakness: CWE-125

Description

In the Linux kernel, the following vulnerability has been resolved: dmaengine: ti: edma: Fix memory allocation size for queue_priority_map Fix a critical memory allocation bug in edma_setup_from_hw() where queue_priority_map was allocated with insufficient memory. The code declared queue_priority_map as s8 (*)[2] (pointer to array of 2 s8), but allocated memory using sizeof(s8) instead of the correct size. This caused out-of-bounds memory writes when accessing: queue_priority_map[i][0] = i; queue_priority_map[i][1] = i; The bug manifested as kernel crashes with "Oops - undefined instruction" on ARM platforms (BeagleBoard-X15) during EDMA driver probe, as the memory corruption triggered kernel hardening features on Clang. Change the allocation to use sizeof(*queue_priority_map) which automatically gets the correct size for the 2D array structure.

Affected products

Debian Linux: 11.0
Linux kernel: from 4.4 before 5.4.300; from 5.5 before 5.10.245; from 5.11 before 5.15.194; from 5.16 before 6.1.153; from 6.2 before 6.6.107; from 6.7 before 6.12.48 — fixed in 5.10.245, 5.15.194, 5.4.300, 6.1.153, 6.12.48, 6.16.8

How to fix

Upgrade to a fixed version: Linux kernel 5.10.245, 5.15.194, 5.4.300, 6.1.153. Check the vendor advisory for mitigations.

References

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