CVE-2024-27437 (GCVE-0-2024-27437)

Vulnerability from cvelistv5 – Published: 2024-04-05 08:24 – Updated: 2026-10-15 00:40
VLAI
Title
vfio/pci: Disable auto-enable of exclusive INTx IRQ
Summary
In the Linux kernel, the following vulnerability has been resolved: vfio/pci: Disable auto-enable of exclusive INTx IRQ Currently for devices requiring masking at the irqchip for INTx, ie. devices without DisINTx support, the IRQ is enabled in request_irq() and subsequently disabled as necessary to align with the masked status flag. This presents a window where the interrupt could fire between these events, resulting in the IRQ incrementing the disable depth twice. This would be unrecoverable for a user since the masked flag prevents nested enables through vfio. Instead, invert the logic using IRQF_NO_AUTOEN such that exclusive INTx is never auto-enabled, then unmask as required.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-04-05 13:39 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 , < 26389925d6c2126fb777821a0a983adca7ee6351 (git)
Affected: 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 , < 561d5e1998d58b54ce2bbbb3e843b669aa0b3db5 (git)
Affected: 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 , < b7a2f0955ffceffadfe098b40b50307431f45438 (git)
Affected: 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 , < 139dfcc4d723ab13469881200c7d80f49d776060 (git)
Affected: 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 , < 2a4a666c45107206605b7b5bc20545f8aabc4fa2 (git)
Affected: 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 , < 3b3491ad0f80d913e7d255941d4470f4a4d9bfda (git)
Affected: 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 , < bf0bc84a20e6109ab07d5dc072067bd01eb931ec (git)
Affected: 89e1f7d4c66d85f42c3d52ea3866eb10cadf6153 , < fe9a7082684eb059b925c535682e68c34d487d43 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.6
Unaffected: 0 , < 3.6 (semver)
Unaffected: 5.4.274 , ≤ 5.4.* (semver)
Unaffected: 5.10.215 , ≤ 5.10.* (semver)
Unaffected: 5.15.154 , ≤ 5.15.* (semver)
Unaffected: 6.1.84 , ≤ 6.1.* (semver)
Unaffected: 6.6.24 , ≤ 6.6.* (semver)
Unaffected: 6.7.12 , ≤ 6.7.* (semver)
Unaffected: 6.8.3 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < V1.1.1 (custom)
guessed Create a notification for this product.
Show details on NVD website
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                "drivers/vfio/pci/vfio_pci_intrs.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "3.6"
                },
                {
                  "lessThan": "3.6",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.4.*",
                  "status": "unaffected",
                  "version": "5.4.274",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.215",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.154",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.84",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.24",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.7.*",
                  "status": "unaffected",
                  "version": "6.7.12",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.8.*",
                  "status": "unaffected",
                  "version": "6.8.3",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.9",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.274",
                      "versionStartIncluding": "3.6",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.215",
                      "versionStartIncluding": "3.6",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.154",
                      "versionStartIncluding": "3.6",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.84",
                      "versionStartIncluding": "3.6",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.24",
                      "versionStartIncluding": "3.6",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.7.12",
                      "versionStartIncluding": "3.6",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.8.3",
                      "versionStartIncluding": "3.6",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.9",
                      "versionStartIncluding": "3.6",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvfio/pci: Disable auto-enable of exclusive INTx IRQ\n\nCurrently for devices requiring masking at the irqchip for INTx, ie.\ndevices without DisINTx support, the IRQ is enabled in request_irq()\nand subsequently disabled as necessary to align with the masked status\nflag.  This presents a window where the interrupt could fire between\nthese events, resulting in the IRQ incrementing the disable depth twice.\nThis would be unrecoverable for a user since the masked flag prevents\nnested enables through vfio.\n\nInstead, invert the logic using IRQF_NO_AUTOEN such that exclusive INTx\nis never auto-enabled, then unmask as required."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-05-11T20:10:47.644Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/26389925d6c2126fb777821a0a983adca7ee6351"
            },
            {
              "url": "https://git.kernel.org/stable/c/561d5e1998d58b54ce2bbbb3e843b669aa0b3db5"
            },
            {
              "url": "https://git.kernel.org/stable/c/b7a2f0955ffceffadfe098b40b50307431f45438"
            },
            {
              "url": "https://git.kernel.org/stable/c/139dfcc4d723ab13469881200c7d80f49d776060"
            },
            {
              "url": "https://git.kernel.org/stable/c/2a4a666c45107206605b7b5bc20545f8aabc4fa2"
            },
            {
              "url": "https://git.kernel.org/stable/c/3b3491ad0f80d913e7d255941d4470f4a4d9bfda"
            },
            {
              "url": "https://git.kernel.org/stable/c/bf0bc84a20e6109ab07d5dc072067bd01eb931ec"
            },
            {
              "url": "https://git.kernel.org/stable/c/fe9a7082684eb059b925c535682e68c34d487d43"
            }
          ],
          "title": "vfio/pci: Disable auto-enable of exclusive INTx IRQ",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-27437",
        "datePublished": "2024-04-05T08:24:44.561Z",
        "dateReserved": "2024-02-25T13:47:42.687Z",
        "dateUpdated": "2026-10-15T00:40:22.214Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.
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  • 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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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