CVE-2025-71221 (GCVE-0-2025-71221)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:27 – Updated: 2026-02-16 08:58
VLAI?
Title
dmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue()
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1b38da264674d6a0fe26a63996b8f88b88c3da48 , < 9f665b3c3d9a168410251f27a5d019b7bf93185c (git)
Affected: 1b38da264674d6a0fe26a63996b8f88b88c3da48 , < a143545855bc2c6e1330f6f57ae375ac44af00a7 (git)
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    Linux Linux Affected: 3.16
Unaffected: 0 , < 3.16 (semver)
Unaffected: 6.18.10 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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          "programFiles": [
            "drivers/dma/mmp_pdma.c"
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    "cveId": "CVE-2025-71221",
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    "dateReserved": "2026-02-14T16:26:02.969Z",
    "dateUpdated": "2026-02-16T08:58:43.554Z",
    "state": "PUBLISHED"
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}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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