CVE-2025-39869: debian linux Out-of-bounds Read — Fix

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.

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CVSS v3.1 Score

7.1

HIGH

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

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.4 — 5.4.300
linux	linux_kernel	5.5 — 5.10.245
linux	linux_kernel	5.11 — 5.15.194
linux	linux_kernel	5.16 — 6.1.153
linux	linux_kernel	6.2 — 6.6.107
linux	linux_kernel	6.7 — 6.12.48
linux	linux_kernel	6.13 — 6.16.8
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
debian	debian_linux	All

References

Advisories & Patches

https://git.kernel.org/stable/c/069fd1688c57c0cc8a3de64d108579b31676f74b https://git.kernel.org/stable/c/1baed10553fc8b388351d8fc803e3ae6f1a863bc https://git.kernel.org/stable/c/301a96cc4dc006c9a285913d301e681cfbf7edb6 https://git.kernel.org/stable/c/5e462fa0dfdb52b3983cf41532d3d4c7d63e2f93 https://git.kernel.org/stable/c/7d4de60d6db02d9b01d5890d5156b04fad65d07a https://git.kernel.org/stable/c/d5e82f3f2c918d446df46e8d65f8083fd97cdec5 https://git.kernel.org/stable/c/d722de80ce037dccf6931e778f4a46499d51bdf9 https://git.kernel.org/stable/c/e63419dbf2ceb083c1651852209c7f048089ac0f

Other References

https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html

Frequently Asked Questions

What is CVE-2025-39869? +

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. It has a CVSS v3.1 base score of 7.1 (HIGH).

How severe is CVE-2025-39869? +

CVE-2025-39869 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-39869? +

CVE-2025-39869 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-39869? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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