Vulnerability-Lookup

FKIE_CVE-2025-71221

Vulnerability from fkie_nvd - Published: 2026-02-14 17:15 - Updated: 2026-03-25 11:16

Severity ?

7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9f665b3c3d9a168410251f27a5d019b7bf93185c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a143545855bc2c6e1330f6f57ae375ac44af00a7	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/dfb5e05227745de43b7fd589721817a4337c970d
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/eba0c75670c022cb1f948600db972524bcfe8166
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fc023b8fab057f0c910856ff36d3e12a30b7af4a

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "6.18.10",
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              "vulnerable": true
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue()\n\nAdd proper locking in mmp_pdma_residue() to prevent use-after-free when\naccessing descriptor list and descriptor contents.\n\nThe race occurs when multiple threads call tx_status() while the tasklet\non another CPU is freeing completed descriptors:\n\nCPU 0                              CPU 1\n-----                              -----\nmmp_pdma_tx_status()\nmmp_pdma_residue()\n  -\u003e NO LOCK held\n     list_for_each_entry(sw, ..)\n                                   DMA interrupt\n                                   dma_do_tasklet()\n                                     -\u003e spin_lock(\u0026desc_lock)\n                                        list_move(sw-\u003enode, ...)\n                                        spin_unlock(\u0026desc_lock)\n  |                                     dma_pool_free(sw) \u003c- FREED!\n  -\u003e access sw-\u003edesc \u003c- UAF!\n\nThis issue can be reproduced when running dmatest on the same channel with\nmultiple threads (threads_per_chan \u003e 1).\n\nFix by protecting the chain_running list iteration and descriptor access\nwith the chan-\u003edesc_lock spinlock."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndmaengine: mmp_pdma: Correcci\u00f3n de condici\u00f3n de carrera en mmp_pdma_residue()\n\nA\u00f1adir bloqueo adecuado en mmp_pdma_residue() para prevenir uso despu\u00e9s de liberaci\u00f3n al acceder a la lista de descriptores y al contenido del descriptor.\n\nLa condici\u00f3n de carrera ocurre cuando m\u00faltiples hilos llaman a tx_status() mientras el tasklet en otra CPU est\u00e1 liberando descriptores completados:\n\nCPU 0                              CPU 1\n-----                              -----\nmmp_pdma_tx_status()\nmmp_pdma_residue()\n  -\u0026gt; SIN BLOQUEO mantenido\n     list_for_each_entry(sw, ..)\n                                   Interrupci\u00f3n DMA\n                                   dma_do_tasklet()\n                                     -\u0026gt; spin_lock(\u0026amp;desc_lock)\n                                        list_move(sw-\u0026gt;node, ...)\n                                        spin_unlock(\u0026amp;desc_lock)\n  |                                     dma_pool_free(sw) \u0026lt;- \u00a1LIBERADO!\n  -\u0026gt; acceso a sw-\u0026gt;desc \u0026lt;- \u00a1UAF!\n\nEste problema puede ser reproducido al ejecutar dmatest en el mismo canal con m\u00faltiples hilos (hilos_por_canal \u0026gt; 1).\n\nSoluci\u00f3n protegiendo la iteraci\u00f3n de la lista chain_running y el acceso al descriptor con el spinlock chan-\u0026gt;desc_lock."
    }
  ],
  "id": "CVE-2025-71221",
  "lastModified": "2026-03-25T11:16:15.247",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.0,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-02-14T17:15:54.450",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/9f665b3c3d9a168410251f27a5d019b7bf93185c"
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    },
    {
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    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-02-14 16:27 – Updated: 2026-03-25 10:20

Title

dmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue()

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/dfb5e05227745de43…
	https://git.kernel.org/stable/c/eba0c75670c022cb1…
	https://git.kernel.org/stable/c/fc023b8fab057f0c9…
	https://git.kernel.org/stable/c/9f665b3c3d9a16841…
	https://git.kernel.org/stable/c/a143545855bc2c6e1…

Impacted products

Vendor

Product

Version

Linux

Affected: 1b38da264674d6a0fe26a63996b8f88b88c3da48 , < dfb5e05227745de43b7fd589721817a4337c970d (git)
Affected: 1b38da264674d6a0fe26a63996b8f88b88c3da48 , < eba0c75670c022cb1f948600db972524bcfe8166 (git)
Affected: 1b38da264674d6a0fe26a63996b8f88b88c3da48 , < fc023b8fab057f0c910856ff36d3e12a30b7af4a (git)
Affected: 1b38da264674d6a0fe26a63996b8f88b88c3da48 , < 9f665b3c3d9a168410251f27a5d019b7bf93185c (git)
Affected: 1b38da264674d6a0fe26a63996b8f88b88c3da48 , < a143545855bc2c6e1330f6f57ae375ac44af00a7 (git)

Linux

Affected: 3.16
Unaffected: 0 , < 3.16 (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.10 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/dma/mmp_pdma.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "versionType": "git"
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          ]
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          ],
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          "vendor": "Linux",
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              "version": "3.16"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "versionType": "semver"
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              "versionType": "semver"
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        }
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      "providerMetadata": {
        "dateUpdated": "2026-03-25T10:20:09.939Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/a143545855bc2c6e1330f6f57ae375ac44af00a7"
        }
      ],
      "title": "dmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue()",
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        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71221",
    "datePublished": "2026-02-14T16:27:04.631Z",
    "dateReserved": "2026-02-14T16:26:02.969Z",
    "dateUpdated": "2026-03-25T10:20:09.939Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2025-71221

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

Tags

Sightings

Nomenclature