CVE-2025-71221
7.0 HIGHIn the Linux kernel, the following vulnerability has been resolved: dmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue() Add p...
Published: 2026-02-14 · Last updated: 2026-06-01
Severity and scoring
- CVSS
- 7.0 HIGH
- Vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-362
Affected products
| Vendor | Product |
|---|---|
| linux | linux_kernel |
Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue() Add proper locking in mmp_pdma_residue() to prevent use-after-free when accessing descriptor list and descriptor contents. The race occurs when multiple threads call tx_status() while the tasklet on another CPU is freeing completed descriptors: CPU 0 CPU 1 ----- ----- mmp_pdma_tx_status() mmp_pdma_residue() -> NO LOCK held list_for_each_entry(sw, ..) DMA interrupt dma_do_tasklet() -> spin_lock(&desc_lock) list_move(sw->node, ...) spin_unlock(&desc_lock) | dma_pool_free(sw) <- FREED! -> access sw->desc <- UAF! This issue can be reproduced when running dmatest on the same channel with multiple threads (threads_per_chan > 1). Fix by protecting the chain_running list iteration and descriptor access with the chan->desc_lock spinlock.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2025-71221
- [Other]https://git.kernel.org/stable/c/3f0e0e2d9e752570041e95fd04635e2580097819
- [Patch]https://git.kernel.org/stable/c/9f665b3c3d9a168410251f27a5d019b7bf93185c
- [Patch]https://git.kernel.org/stable/c/a143545855bc2c6e1330f6f57ae375ac44af00a7
- [Other]https://git.kernel.org/stable/c/dfb5e05227745de43b7fd589721817a4337c970d
- [Other]https://git.kernel.org/stable/c/eba0c75670c022cb1f948600db972524bcfe8166
- [Other]https://git.kernel.org/stable/c/fc023b8fab057f0c910856ff36d3e12a30b7af4a
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