CVE-2026-89441 (GCVE-0-2026-89441)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-10-30 12:31
VLAI
Title
mmc: via-sdmmc: cancel card-detect work on remove
Summary
In the Linux kernel, the following vulnerability has been resolved: mmc: via-sdmmc: cancel card-detect work on remove Disabling the device interrupt and freeing the IRQ prevents new card-detect work from being queued, but carddet_work already queued by the handler can still run after via_sd_remove() returns. via_sdc_card_detect() recovers the host through container_of() and dereferences its MMIO base; once remove() returns the host can be freed, so that work would touch freed memory. Cancel carddet_work after freeing the IRQ and before cancelling finish_bh_work, which the card-detect handler can also queue. carddet_work can re-enable the interrupt through via_reset_pcictrl(); mask it again afterwards. This issue was found by an in-house static analysis tool and confirmed by manual code review.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 19:22 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < 28e8e9e1f3bdb75b611ea14c39775455528c4012 (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < a32603f9b4dd0a1c3ea5845eec7c95f5f8741b3d (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < 3ee1b5c8618a26811840bf9f45cb3120dac1e273 (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < 55d71c70f11d9f92c7d2653774001e98cb509deb (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < 0a3c70191868fb007c03ff79693ad4e4b3fdcbb8 (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < f7ff3027ef004a331ef911a4886f12bc2e996037 (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < eaca730c6f5e3609df62a0469fb789235a93d276 (git)
Affected: f0bf7f61b8405224bc52fc9a3ccd167a68126e00 , < 57e5d877f898d5e5c9d672a77bb6bdd24f0d9bf5 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.31
Unaffected: 0 , < 2.6.31 (semver)
Unaffected: 5.10.273 , ≤ 5.10.* (semver)
Unaffected: 5.15.224 , ≤ 5.15.* (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.112 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: via-sdmmc: cancel card-detect work on remove\n\nDisabling the device interrupt and freeing the IRQ prevents new card-detect\nwork from being queued, but carddet_work already queued by the handler can\nstill run after via_sd_remove() returns. via_sdc_card_detect() recovers the\nhost through container_of() and dereferences its MMIO base; once remove()\nreturns the host can be freed, so that work would touch freed memory.\n\nCancel carddet_work after freeing the IRQ and before cancelling\nfinish_bh_work, which the card-detect handler can also queue. carddet_work\ncan re-enable the interrupt through via_reset_pcictrl(); mask it again\nafterwards.\n\nThis issue was found by an in-house static analysis tool and confirmed by\nmanual code review."
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/57e5d877f898d5e5c9d672a77bb6bdd24f0d9bf5"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/a32603f9b4dd0a1c3ea5845eec7c95f5f8741b3d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/eaca730c6f5e3609df62a0469fb789235a93d276"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f7ff3027ef004a331ef911a4886f12bc2e996037"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-30T13:52:12+00:00",
      "cve": "CVE-2026-89441",
      "id": "CVE-2026-89441",
      "initial_release_date": "2026-09-11T00:00:00+00:00",
      "product_status:known_affected": "279",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mmc: via-sdmmc: cancel card-detect work on remove",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89441.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-89441",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-10-16T19:22:13.294951Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-10-16T19:22:14.214Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/mmc/host/via-sdmmc.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "28e8e9e1f3bdb75b611ea14c39775455528c4012",
                  "status": "affected",
                  "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
                  "versionType": "git"
                },
                {
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                  "status": "affected",
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                  "versionType": "git"
                },
                {
                  "lessThan": "3ee1b5c8618a26811840bf9f45cb3120dac1e273",
                  "status": "affected",
                  "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
                  "versionType": "git"
                },
                {
                  "lessThan": "55d71c70f11d9f92c7d2653774001e98cb509deb",
                  "status": "affected",
                  "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
                  "versionType": "git"
                },
                {
                  "lessThan": "0a3c70191868fb007c03ff79693ad4e4b3fdcbb8",
                  "status": "affected",
                  "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
                  "versionType": "git"
                },
                {
                  "lessThan": "f7ff3027ef004a331ef911a4886f12bc2e996037",
                  "status": "affected",
                  "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
                  "versionType": "git"
                },
                {
                  "lessThan": "eaca730c6f5e3609df62a0469fb789235a93d276",
                  "status": "affected",
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                  "versionType": "git"
                },
                {
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                  "status": "affected",
                  "version": "f0bf7f61b8405224bc52fc9a3ccd167a68126e00",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/mmc/host/via-sdmmc.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "2.6.31"
                },
                {
                  "lessThan": "2.6.31",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.273",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.224",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.191",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.160",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.12.*",
                  "status": "unaffected",
                  "version": "6.12.112",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.18.*",
                  "status": "unaffected",
                  "version": "6.18.50",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "7.2.*",
                  "status": "unaffected",
                  "version": "7.2.4",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "7.3",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.273",
                      "versionStartIncluding": "2.6.31",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.224",
                      "versionStartIncluding": "2.6.31",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.191",
                      "versionStartIncluding": "2.6.31",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.160",
                      "versionStartIncluding": "2.6.31",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.12.112",
                      "versionStartIncluding": "2.6.31",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.18.50",
                      "versionStartIncluding": "2.6.31",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "7.2.4",
                      "versionStartIncluding": "2.6.31",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "7.3",
                      "versionStartIncluding": "2.6.31",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: via-sdmmc: cancel card-detect work on remove\n\nDisabling the device interrupt and freeing the IRQ prevents new card-detect\nwork from being queued, but carddet_work already queued by the handler can\nstill run after via_sd_remove() returns. via_sdc_card_detect() recovers the\nhost through container_of() and dereferences its MMIO base; once remove()\nreturns the host can be freed, so that work would touch freed memory.\n\nCancel carddet_work after freeing the IRQ and before cancelling\nfinish_bh_work, which the card-detect handler can also queue. carddet_work\ncan re-enable the interrupt through via_reset_pcictrl(); mask it again\nafterwards.\n\nThis issue was found by an in-house static analysis tool and confirmed by\nmanual code review."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The UAF is reached from via_sd_remove() on the VIA VT9530 PCI SD/MMC host when unbind, rmmod, or PCI hot-remove leaves carddet_work pending; no network, Bluetooth, or USB hotplug path enters this teardown.\nAC:L - CIR IRQ queues carddet_work and via_sdc_card_detect() sleeps in via_reset_pcictrl while the attacker retries PCI unbind/rebind, so both sides of the missing cancel_work_sync race are attacker-controlled and retryable; such UAFs score AC:L.\nPR:L - Per CNA driver-removal UAF precedent, including sibling CVE-2026-89440 on this same via-sdmmc driver, an unprivileged local user on a machine with this PCI reader can spray the freed host while teardown proceeds; init-namespace root is not required.\nUI:N - No victim action such as mounting media or opening a file is required; the attacker queues carddet_work (or uses in-flight CIR work) and coordinates with driver removal themselves.\nS:U - The use-after-free corrupts the host kernel\u0027s via_crdr_mmc_host/mmc_host heap object within the same security authority; it is not a VM escape, IOMMU/DMA isolation bypass, or sandbox breakout.\nC:H - via_sdc_card_detect() recovers the freed via_crdr_mmc_host via container_of() and dereferences its MMIO bases, lock, and mrq; this kernel heap UAF enables arbitrary read via slab reuse.\nI:H - The dangling worker performs MMIO writes (DMA soft-reset, via_reset_pcictrl), may queue finish_bh_work, and can re-enable PCIINTCTRL after free_irq, yielding heap-spray write and control-flow hijack primitives.\nA:H - Use-after-free of sdhost after iounmap and devm mmc_free_host causes a kernel oops or panic even when not fully exploited, so availability impact is High."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-30T12:31:41.816Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/28e8e9e1f3bdb75b611ea14c39775455528c4012"
            },
            {
              "url": "https://git.kernel.org/stable/c/a32603f9b4dd0a1c3ea5845eec7c95f5f8741b3d"
            },
            {
              "url": "https://git.kernel.org/stable/c/3ee1b5c8618a26811840bf9f45cb3120dac1e273"
            },
            {
              "url": "https://git.kernel.org/stable/c/55d71c70f11d9f92c7d2653774001e98cb509deb"
            },
            {
              "url": "https://git.kernel.org/stable/c/0a3c70191868fb007c03ff79693ad4e4b3fdcbb8"
            },
            {
              "url": "https://git.kernel.org/stable/c/f7ff3027ef004a331ef911a4886f12bc2e996037"
            },
            {
              "url": "https://git.kernel.org/stable/c/eaca730c6f5e3609df62a0469fb789235a93d276"
            },
            {
              "url": "https://git.kernel.org/stable/c/57e5d877f898d5e5c9d672a77bb6bdd24f0d9bf5"
            }
          ],
          "title": "mmc: via-sdmmc: cancel card-detect work on remove",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2026-89441",
        "datePublished": "2026-09-11T19:43:10.083Z",
        "dateReserved": "2026-09-11T19:38:34.703Z",
        "dateUpdated": "2026-10-30T12:31:41.816Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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