CVE-2023-52801 (GCVE-0-2023-52801)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:31 – Updated: 2026-08-05 09:11
VLAI
Title
iommufd: Fix missing update of domains_itree after splitting iopt_area
Summary
In the Linux kernel, the following vulnerability has been resolved: iommufd: Fix missing update of domains_itree after splitting iopt_area In iopt_area_split(), if the original iopt_area has filled a domain and is linked to domains_itree, pages_nodes have to be properly reinserted. Otherwise the domains_itree becomes corrupted and we will UAF.
Severity
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-284 - Improper Access Control
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 51fe6141f0f64ae0bbc096a41a07572273e8c0ef , < 836db2e7e4565d8218923b3552304a1637e2f28d (git)
Affected: 51fe6141f0f64ae0bbc096a41a07572273e8c0ef , < fcb32111f01ddf3cbd04644cde1773428e31de6a (git)
Affected: 51fe6141f0f64ae0bbc096a41a07572273e8c0ef , < e7250ab7ca4998fe026f2149805b03e09dc32498 (git)
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Linux Linux Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 6.5.13 , ≤ 6.5.* (semver)
Unaffected: 6.6.3 , ≤ 6.6.* (semver)
Unaffected: 6.7 , ≤ * (original_commit_for_fix)
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linux linux_kernel Affected: 51fe6141f0f6 , < 836db2e7e456 (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Affected: 51fe6141f0f6 , < fcb32111f01d (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Affected: 51fe6141f0f6 , < e7250ab7ca49 (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Affected: 6..2
    cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 0 , < 6.2 (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 6.5.13 , ≤ 6.5.* (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 6.6.3 , ≤ 6.6.* (custom)
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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linux linux_kernel Unaffected: 6.7
    cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-04T22:56:44+00:00",
      "cve": "CVE-2023-52801",
      "id": "CVE-2023-52801",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "279",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: iommufd: Fix missing update of domains_itree after splitting iopt_area",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52801.json",
      "version": "3"
    },
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there is no network or adjacent-network path.\\nAC:L - The attacker fully controls the preconditions\\u2014disable large pages (VFIO_TYPE1_IOMMU or IOMMU_OPTION_HUGE_PAGES), map an IOVA range with a filled domain, then partial-unmap to force the split\\u2014so the domains_itree UAF is deterministic with no race or external condition.\\nPR:L - iommufd_fops_open() has no capability check; access is only DAC on /dev/iommu (0660) or /dev/vfio/vfio (0666), routinely granted to unprivileged qemu/libvirt passthrough users, matching other iommufd CVEs scored PR:L.\\nUI:N - The full map/set-iommu/partial-unmap sequence is issued by the attacker\u0027s own process with no victim interaction required.\\nS:C - domains_itree tracks which iopt_areas hold DMA-mapped PFNs in live iommu_domains; leaving a freed area linked and then walking/removing from that tree corrupts IOMMU mapping bookkeeping and can unpin or mis-resolve pages still device-mapped, defeating the DMA isolation boundary.\\nC:H - The commit documents a use-after-free on the freed iopt_area still linked in domains_itree; UAF of a sprayable kzalloc object enables arbitrary kernel memory disclosure, and corrupted domain PFN lookup can expose host pages to device DMA.\\nI:H - The same UAF/tree corruption yields write primitives via interval-tree remove/insert on attacker-reclaimed memory and broken unpin/unmap of IOMMU-backed pages, enabling control-flow hijack and integrity compromise.\\nA:H - Use-after-free on domains_itree walks causes kernel oops/panic, and interval-tree operations on a dangling freed node can hang or crash subsequent iommufd unmap/destroy paths.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"51fe6141f0f64ae0bbc096a41a07572273e8c0ef\", \"lessThan\": \"836db2e7e4565d8218923b3552304a1637e2f28d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"51fe6141f0f64ae0bbc096a41a07572273e8c0ef\", \"lessThan\": \"fcb32111f01ddf3cbd04644cde1773428e31de6a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"51fe6141f0f64ae0bbc096a41a07572273e8c0ef\", \"lessThan\": \"e7250ab7ca4998fe026f2149805b03e09dc32498\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/iommu/iommufd/io_pagetable.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.2\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.2\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.5.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.5.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/iommu/iommufd/io_pagetable.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/836db2e7e4565d8218923b3552304a1637e2f28d\"}, {\"url\": \"https://git.kernel.org/stable/c/fcb32111f01ddf3cbd04644cde1773428e31de6a\"}, {\"url\": \"https://git.kernel.org/stable/c/e7250ab7ca4998fe026f2149805b03e09dc32498\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\niommufd: Fix missing update of domains_itree after splitting iopt_area\\n\\nIn iopt_area_split(), if the original iopt_area has filled a domain and is\\nlinked to domains_itree, pages_nodes have to be properly\\nreinserted. Otherwise the domains_itree becomes corrupted and we will UAF.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5.13\", \"versionStartIncluding\": \"6.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.3\", \"versionStartIncluding\": \"6.2\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7\", \"versionStartIncluding\": \"6.2\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T09:11:28.903Z\"}}}",
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      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.