CVE-2026-23429 (GCVE-0-2026-23429)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-08-05 12:21
VLAI
Title
iommu/sva: Fix crash in iommu_sva_unbind_device()
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/sva: Fix crash in iommu_sva_unbind_device() domain->mm->iommu_mm can be freed by iommu_domain_free(): iommu_domain_free() mmdrop() __mmdrop() mm_pasid_drop() After iommu_domain_free() returns, accessing domain->mm->iommu_mm may dereference a freed mm structure, leading to a crash. Fix this by moving the code that accesses domain->mm->iommu_mm to before the call to iommu_domain_free().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9f0a7ab700f8620e433b05c57fbd26c92ea186d9 , < 58abeb7b9562f25bdfa2f5ae5ce803eb02e74433 (git)
Affected: e37d5a2d60a338c5917c45296bac65da1382eda5 , < f5daaa2c959d9f894fb5b1ab76da8612dd220a0d (git)
Affected: e37d5a2d60a338c5917c45296bac65da1382eda5 , < 06e14c36e20b48171df13d51b89fe67c594ed07a (git)
Affected: 6.18.7 , < 6.18.20 (semver)
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Linux Linux Affected: 6.19
Unaffected: 0 , < 6.19 (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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    "dateReserved": "2026-01-13T15:37:46.016Z",
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/sva: Fix crash in iommu_sva_unbind_device()\n\ndomain-\u003emm-\u003eiommu_mm can be freed by iommu_domain_free():\n  iommu_domain_free()\n    mmdrop()\n      __mmdrop()\n        mm_pasid_drop()\nAfter iommu_domain_free() returns, accessing domain-\u003emm-\u003eiommu_mm may\ndereference a freed mm structure, leading to a crash.\n\nFix this by moving the code that accesses domain-\u003emm-\u003eiommu_mm to before\nthe call to iommu_domain_free()."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\niommu/sva: Corrige un fallo en iommu_sva_unbind_device()\n\ndomain -\u003e mm -\u003e iommu_mm puede ser liberado por iommu_domain_free():\n  iommu_domain_free()\n    mmdrop()\n      __mmdrop()\n        mm_pasid_drop()\nDespu\u00e9s de que iommu_domain_free() retorna, acceder a domain -\u003e mm -\u003e iommu_mm puede desreferenciar una estructura mm liberada, lo que lleva a un fallo.\n\nSoluciona esto moviendo el c\u00f3digo que accede a domain -\u003e mm -\u003e iommu_mm a antes de la llamada a iommu_domain_free()."
          }
        ],
        "id": "CVE-2026-23429",
        "lastModified": "2026-07-24T21:10:00.143",
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        "vulnStatus": "Modified",
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T07:20:56+00:00",
      "cve": "CVE-2026-23429",
      "id": "CVE-2026-23429",
      "initial_release_date": "2026-04-03T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: iommu/sva: Fix crash in iommu_sva_unbind_device()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23429.json",
      "version": "3"
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.


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