CVE-2023-52790 (GCVE-0-2023-52790)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:31 – Updated: 2026-08-05 09:11
VLAI
Title
swiotlb: fix out-of-bounds TLB allocations with CONFIG_SWIOTLB_DYNAMIC
Summary
In the Linux kernel, the following vulnerability has been resolved: swiotlb: fix out-of-bounds TLB allocations with CONFIG_SWIOTLB_DYNAMIC Limit the free list length to the size of the IO TLB. Transient pool can be smaller than IO_TLB_SEGSIZE, but the free list is initialized with the assumption that the total number of slots is a multiple of IO_TLB_SEGSIZE. As a result, swiotlb_area_find_slots() may allocate slots past the end of a transient IO TLB buffer.
Severity
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-22 19:32 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 79636caad3618e2b38457f6e298c9b31ba82b489 , < ce7612496a4ba6068bc68aa1fa9d947dadb4ad9b (git)
Affected: 79636caad3618e2b38457f6e298c9b31ba82b489 , < 53c87e846e335e3c18044c397cc35178163d7827 (git)
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Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.3 , ≤ 6.6.* (semver)
Unaffected: 6.7 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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                  "lessThan": "6.6",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.3",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.7",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.3",
                      "versionStartIncluding": "6.6",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.7",
                      "versionStartIncluding": "6.6",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nswiotlb: fix out-of-bounds TLB allocations with CONFIG_SWIOTLB_DYNAMIC\n\nLimit the free list length to the size of the IO TLB. Transient pool can be\nsmaller than IO_TLB_SEGSIZE, but the free list is initialized with the\nassumption that the total number of slots is a multiple of IO_TLB_SEGSIZE.\nAs a result, swiotlb_area_find_slots() may allocate slots past the end of\na transient IO TLB buffer."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The vulnerable code is in the kernel DMA/swiotlb allocator, reached when drivers call dma_map/swiotlb_tbl_map_single for I/O (including NIC RX/TX on untrusted PCI devices), which requires local ability to stimulate device DMA rather than a network-bound protocol parser.\nAC:L - Once CONFIG_SWIOTLB_DYNAMIC is enabled and SWIOTLB is under pressure, the reporter showed TCP/IP workloads on an untrusted VF reliably create transient pools and hit the unaligned \u003e=PAGE_SIZE path that overruns the buffer; the attacker can induce that load.\nPR:L - An unprivileged local user can trigger DMA mapping through ordinary network or storage I/O that causes drivers to bounce via swiotlb; no root or CAP_* beyond normal user access is required.\nUI:N - Exploitation does not require a victim to perform any action such as mounting a filesystem or opening a crafted file; generating I/O is sufficient.\nS:C - On the iommu_dma_map_page path for untrusted PCI devices, an overrun bounce address is passed to iommu_map, mapping physical pages outside the SWIOTLB pool into the device IOVA space and bypassing the IOMMU/DMA isolation boundary.\nC:H - Out-of-bounds slot metadata writes and bounce/DMA access past the transient pool expose adjacent kernel or host physical memory, yielding a high-impact disclosure primitive.\nI:H - The bug is a confirmed out-of-bounds write (CWE-787) into slots[] and past the TLB buffer, and device DMA to wrongly IOMMU-mapped pages enables arbitrary modification of adjacent memory and control-flow corruption.\nA:H - Overrunning the transient pool corrupts kernel memory and can crash or hang the system, as seen when the mis-sized bounce buffer is used for DMA and CPU-side bounce/memset."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T09:11:25.655Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/ce7612496a4ba6068bc68aa1fa9d947dadb4ad9b"
            },
            {
              "url": "https://git.kernel.org/stable/c/53c87e846e335e3c18044c397cc35178163d7827"
            }
          ],
          "title": "swiotlb: fix out-of-bounds TLB allocations with CONFIG_SWIOTLB_DYNAMIC",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2023-52790",
        "datePublished": "2024-05-21T15:31:06.319Z",
        "dateReserved": "2024-05-21T15:19:24.241Z",
        "dateUpdated": "2026-08-05T09:11:25.655Z",
        "state": "PUBLISHED"
      },
      "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

Author Source Type Date Other

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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.