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🛡️ CVE-2025-38300 — debian-linux

🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-401 NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

crypto: sun8i-ce-cipher - fix error handling in sun8i_ce_cipher_prepare()

In the Linux kernel, the following vulnerability has been resolved:

crypto: sun8i-ce-cipher - fix error handling in sun8i_ce_cipher_prepare()

Fix two DMA cleanup issues on the error path in sun8i_ce_cipher_prepare():

1] If dma_map_sg() fails for areq->dst, the device driver would try to free

DMA memory it has not allocated in the first place. To fix this, on the

"theend_sgs" error path, call dma unmap only if the corresponding dma

map was successful.

2] If the dma_map_single() call for the IV fails, the device driver would

try to free an invalid DMA memory address on the "theend_iv" path:

------------[ cut here ]------------

DMA-API: sun8i-ce 1904000.crypto: device driver tries to free an invalid DMA memory address

WARNING: CPU: 2 PID: 69 at kernel/dma/debug.c:968 check_unmap+0x123c/0x1b90

Modules linked in: skcipher_example(O+)

CPU: 2 UID: 0 PID: 69 Comm: 1904000.crypto- Tainted: G O 6.15.0-rc3+ #24 PREEMPT

Tainted: [O]=OOT_MODULE

Hardware name: OrangePi Zero2 (DT)

pc : check_unmap+0x123c/0x1b90

lr : check_unmap+0x123c/0x1b90

...

Call trace:

check_unmap+0x123c/0x1b90 (P)

debug_dma_unmap_page+0xac/0xc0

dma_unmap_page_attrs+0x1f4/0x5fc

sun8i_ce_cipher_do_one+0x1bd4/0x1f40

crypto_pump_work+0x334/0x6e0

kthread_worker_fn+0x21c/0x438

kthread+0x374/0x664

ret_from_fork+0x10/0x20

---[ end trace 0000000000000000 ]---

To fix this, check for !dma_mapping_error() before calling

dma_unmap_single() on the "theend_iv" path.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2025-38300 is classified as CWE-401: Memory Leak. Allocated memory is never released, so long-running or repeated operations gradually exhaust it.

Affected software

CVE-2025-38300 is recorded against 3 packages.

  • debian-linux
  • kernel (from 6.13.0 up to 6.15.3)
  • linux-kernel (from 6.13 up to 6.15.3)

Timeline and source

Published on 10 July 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
lists.debian.org

CVE-2025-38300 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE CWE-401
Public Exploit ✅ No
Source NVD
Published 2025-07-10
Updated 2026-08-20
Modified 2026-06-17

Affected Packages

Software From version Fixed in
debian-linux — —
kernel 6.13.0 6.15.3
linux-kernel 6.13 6.15.3

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