Vulnerability-Lookup

FKIE_CVE-2026-89440

Vulnerability from fkie_nvd - Published: 2026-09-11 20:19 - Updated: 2026-09-14 13:19

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: mmc: via-sdmmc: stop card-detect handling on probe failure request_irq() registers the SD card-detect interrupt and the probe enables it before mmc_add_host() runs. If mmc_add_host() fails, the error path only unmaps the registers and returns: the interrupt stays registered, so the handler keeps running against the host once it is freed. via_sdc_isr() dereferences sdhost and its MMIO base and schedules carddet_work, which via_sdc_card_detect() also runs against freed memory through its container_of() dereference. Add a probe-error path that disables and frees the interrupt and cancels carddet_work before unmapping. carddet_work can re-enable the device interrupt via via_reset_pcictrl(), which restores PCIINTCTRL, so mask it again after cancelling the work. This issue was found by an in-house static analysis tool and confirmed by manual code review.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/088eaa92fcebaa6b957ccf9635afdf39643a577d
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2550f89589caad7402d618d7dffc038582c94b6b
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5bb5327b92aae17e91c7228953c350a6ee3c94e8
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/806409f12fdb14c9e4c56a64494c9b75f356cd49
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c2b8a624911999399cc14822fec3e35032b3cee4
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d045596706d1b25d38af4a79980b017639fea9d1
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/efe7f25dd27e35063477b4b0e7eed3675669fd99

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "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": "5bb5327b92aae17e91c7228953c350a6ee3c94e8",
              "status": "affected",
              "version": "63400da6cd37a9793c19bb6aed7131b58b975a04",
              "versionType": "git"
            },
            {
              "lessThan": "d045596706d1b25d38af4a79980b017639fea9d1",
              "status": "affected",
              "version": "0959cc1685eb19774300d43ef25e318b457b156b",
              "versionType": "git"
            },
            {
              "lessThan": "806409f12fdb14c9e4c56a64494c9b75f356cd49",
              "status": "affected",
              "version": "ba91b413983a9235792523c6b9f7ba2586c4d75d",
              "versionType": "git"
            },
            {
              "lessThan": "dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02",
              "status": "affected",
              "version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
              "versionType": "git"
            },
            {
              "lessThan": "efe7f25dd27e35063477b4b0e7eed3675669fd99",
              "status": "affected",
              "version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
              "versionType": "git"
            },
            {
              "lessThan": "2550f89589caad7402d618d7dffc038582c94b6b",
              "status": "affected",
              "version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
              "versionType": "git"
            },
            {
              "lessThan": "c2b8a624911999399cc14822fec3e35032b3cee4",
              "status": "affected",
              "version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
              "versionType": "git"
            },
            {
              "lessThan": "088eaa92fcebaa6b957ccf9635afdf39643a577d",
              "status": "affected",
              "version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "076bcd2c93e16b05c10564e299d6e5d26a766d00",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "12b8e81b77c05c658efd9cde3585bbd65ae39b59",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "95025a8dd0ec015872f6c16473fe04d6264e68ca",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f59ef2a47a228e51322ad76752a55a8917c56e38",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0ec94795114edc7e24ec71849dce42bfa61dafa3",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.270",
              "status": "affected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.221",
              "status": "affected",
              "version": "5.15.86",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.188",
              "status": "affected",
              "version": "6.1.2",
              "versionType": "semver"
            },
            {
              "lessThan": "4.10",
              "status": "affected",
              "version": "4.9.337",
              "versionType": "semver"
            },
            {
              "lessThan": "4.15",
              "status": "affected",
              "version": "4.14.303",
              "versionType": "semver"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.270",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.229",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1",
              "status": "affected",
              "version": "6.0.16",
              "versionType": "semver"
            }
          ]
        },
        {
          "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": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "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-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: via-sdmmc: stop card-detect handling on probe failure\n\nrequest_irq() registers the SD card-detect interrupt and the probe enables\nit before mmc_add_host() runs. If mmc_add_host() fails, the error path only\nunmaps the registers and returns: the interrupt stays registered, so the\nhandler keeps running against the host once it is freed. via_sdc_isr()\ndereferences sdhost and its MMIO base and schedules carddet_work, which\nvia_sdc_card_detect() also runs against freed memory through its\ncontainer_of() dereference.\n\nAdd a probe-error path that disables and frees the interrupt and cancels\ncarddet_work before unmapping. carddet_work can re-enable the device\ninterrupt via via_reset_pcictrl(), which restores PCIINTCTRL, so mask it\nagain after cancelling the work.\n\nThis issue was found by an in-house static analysis tool and confirmed by\nmanual code review."
    }
  ],
  "id": "CVE-2026-89440",
  "lastModified": "2026-09-14T13:19:01.230",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-09-11T20:19:24.330",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/088eaa92fcebaa6b957ccf9635afdf39643a577d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2550f89589caad7402d618d7dffc038582c94b6b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5bb5327b92aae17e91c7228953c350a6ee3c94e8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/806409f12fdb14c9e4c56a64494c9b75f356cd49"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c2b8a624911999399cc14822fec3e35032b3cee4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d045596706d1b25d38af4a79980b017639fea9d1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/efe7f25dd27e35063477b4b0e7eed3675669fd99"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-89440 (GCVE-0-2026-89440)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-14 11:59

Title

mmc: via-sdmmc: stop card-detect handling on probe failure

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/5bb5327b92aae17e9…
https://git.kernel.org/stable/c/d045596706d1b25d3…
https://git.kernel.org/stable/c/806409f12fdb14c9e…
https://git.kernel.org/stable/c/dde5b9c91e9fc64e5…
https://git.kernel.org/stable/c/efe7f25dd27e35063…
https://git.kernel.org/stable/c/2550f89589caad740…
https://git.kernel.org/stable/c/c2b8a624911999399…
https://git.kernel.org/stable/c/088eaa92fcebaa6b9…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 63400da6cd37a9793c19bb6aed7131b58b975a04 , < 5bb5327b92aae17e91c7228953c350a6ee3c94e8 (git) Affected: 0959cc1685eb19774300d43ef25e318b457b156b , < d045596706d1b25d38af4a79980b017639fea9d1 (git) Affected: ba91b413983a9235792523c6b9f7ba2586c4d75d , < 806409f12fdb14c9e4c56a64494c9b75f356cd49 (git) Affected: e4e46fb61e3bb4628170810d3f2b996b709b90d9 , < dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02 (git) Affected: e4e46fb61e3bb4628170810d3f2b996b709b90d9 , < efe7f25dd27e35063477b4b0e7eed3675669fd99 (git) Affected: e4e46fb61e3bb4628170810d3f2b996b709b90d9 , < 2550f89589caad7402d618d7dffc038582c94b6b (git) Affected: e4e46fb61e3bb4628170810d3f2b996b709b90d9 , < c2b8a624911999399cc14822fec3e35032b3cee4 (git) Affected: e4e46fb61e3bb4628170810d3f2b996b709b90d9 , < 088eaa92fcebaa6b957ccf9635afdf39643a577d (git) Affected: 076bcd2c93e16b05c10564e299d6e5d26a766d00 (git) Affected: 12b8e81b77c05c658efd9cde3585bbd65ae39b59 (git) Affected: 95025a8dd0ec015872f6c16473fe04d6264e68ca (git) Affected: f59ef2a47a228e51322ad76752a55a8917c56e38 (git) Affected: 0ec94795114edc7e24ec71849dce42bfa61dafa3 (git) Affected: 5.10.163 , < 5.10.270 (semver) Affected: 5.15.86 , < 5.15.221 (semver) Affected: 6.1.2 , < 6.1.188 (semver) Affected: 4.9.337 , < 4.10 (semver) Affected: 4.14.303 , < 4.15 (semver) Affected: 4.19.270 , < 4.20 (semver) Affected: 5.4.229 , < 5.5 (semver) Affected: 6.0.16 , < 6.1 (semver)
Linux	Linux	Affected: 6.2 Unaffected: 0 , < 6.2 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.109 , ≤ 6.12.* (semver) Unaffected: 6.18.50 , ≤ 6.18.* (semver) Unaffected: 7.2.4 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "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": "5bb5327b92aae17e91c7228953c350a6ee3c94e8",
              "status": "affected",
              "version": "63400da6cd37a9793c19bb6aed7131b58b975a04",
              "versionType": "git"
            },
            {
              "lessThan": "d045596706d1b25d38af4a79980b017639fea9d1",
              "status": "affected",
              "version": "0959cc1685eb19774300d43ef25e318b457b156b",
              "versionType": "git"
            },
            {
              "lessThan": "806409f12fdb14c9e4c56a64494c9b75f356cd49",
              "status": "affected",
              "version": "ba91b413983a9235792523c6b9f7ba2586c4d75d",
              "versionType": "git"
            },
            {
              "lessThan": "dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02",
              "status": "affected",
              "version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
              "versionType": "git"
            },
            {
              "lessThan": "efe7f25dd27e35063477b4b0e7eed3675669fd99",
              "status": "affected",
              "version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
              "versionType": "git"
            },
            {
              "lessThan": "2550f89589caad7402d618d7dffc038582c94b6b",
              "status": "affected",
              "version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
              "versionType": "git"
            },
            {
              "lessThan": "c2b8a624911999399cc14822fec3e35032b3cee4",
              "status": "affected",
              "version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
              "versionType": "git"
            },
            {
              "lessThan": "088eaa92fcebaa6b957ccf9635afdf39643a577d",
              "status": "affected",
              "version": "e4e46fb61e3bb4628170810d3f2b996b709b90d9",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "076bcd2c93e16b05c10564e299d6e5d26a766d00",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "12b8e81b77c05c658efd9cde3585bbd65ae39b59",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "95025a8dd0ec015872f6c16473fe04d6264e68ca",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f59ef2a47a228e51322ad76752a55a8917c56e38",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0ec94795114edc7e24ec71849dce42bfa61dafa3",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.270",
              "status": "affected",
              "version": "5.10.163",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.221",
              "status": "affected",
              "version": "5.15.86",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.188",
              "status": "affected",
              "version": "6.1.2",
              "versionType": "semver"
            },
            {
              "lessThan": "4.10",
              "status": "affected",
              "version": "4.9.337",
              "versionType": "semver"
            },
            {
              "lessThan": "4.15",
              "status": "affected",
              "version": "4.14.303",
              "versionType": "semver"
            },
            {
              "lessThan": "4.20",
              "status": "affected",
              "version": "4.19.270",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.229",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1",
              "status": "affected",
              "version": "6.0.16",
              "versionType": "semver"
            }
          ]
        },
        {
          "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": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.109",
              "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-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.10.163",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
                },
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                  "versionEndExcluding": "7.2.4",
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                },
                {
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                  "versionEndExcluding": "7.3-rc1",
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                  "vulnerable": true
                },
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                  "versionStartIncluding": "4.9.337",
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: via-sdmmc: stop card-detect handling on probe failure\n\nrequest_irq() registers the SD card-detect interrupt and the probe enables\nit before mmc_add_host() runs. If mmc_add_host() fails, the error path only\nunmaps the registers and returns: the interrupt stays registered, so the\nhandler keeps running against the host once it is freed. via_sdc_isr()\ndereferences sdhost and its MMIO base and schedules carddet_work, which\nvia_sdc_card_detect() also runs against freed memory through its\ncontainer_of() dereference.\n\nAdd a probe-error path that disables and frees the interrupt and cancels\ncarddet_work before unmapping. carddet_work can re-enable the device\ninterrupt via via_reset_pcictrl(), which restores PCIINTCTRL, so mask it\nagain after cancelling the work.\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 leftover IRQ use-after-free is in the VIA VT9530 PCI SD/MMC host probe path (via_sd_probe enabling via_sdc_isr before mmc_add_host) on systems that already have this onboard/PCI reader; it is not reached by network packets or USB hotplug.\nAC:L - The driver arms the shared card-detect IRQ before mmc_add_host(); a failed add leaves via_sdc_isr registered against freed sdhost indefinitely, so a local attacker who induces device_add failure (memory pressure/reprobe) and reclaims the host slab does not depend on an uncontrolled race.\nPR:L - An unprivileged local user on a machine with this PCI reader can be present when probe fails and then spray the heap while the dangling shared IRQ fires; capability-gated PCI sysfs unbind is not required for the UAF itself, so PR:L is the higher-severity defensible bar.\nUI:N - No victim action such as inserting an SD card, mounting media, or opening a file is required; after failed probe the leftover ISR and carddet_work run from hardware or shared interrupts without another user\u0027s involvement.\nS:U - The use-after-free corrupts kernel heap and IRQ/workqueue state inside the host OS; this is standard in-kernel memory corruption, not a VM escape, IOMMU/DMA isolation bypass, or other cross-authority breakout.\nC:H - via_sdc_isr spin_locks and dereferences the freed via_crdr_mmc_host (MMIO bases and status registers) and may queue carddet_work that recovers the same object via container_of(), a kernel UAF that enables arbitrary disclosure via slab reuse.\nI:H - The same UAF lets a reclaimed host object supply lock, MMIO, and work pointers used for MMIO writes, work scheduling, and via_reset_pcictrl, enabling heap spraying and control-flow hijack rather than a crash-only outcome.\nA:H - IRQ-context dereference of freed sdhost after iounmap and devm mmc_free_host causes a kernel oops or panic even without full exploitation, so availability impact is High."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T11:59:51.359Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5bb5327b92aae17e91c7228953c350a6ee3c94e8"
        },
        {
          "url": "https://git.kernel.org/stable/c/d045596706d1b25d38af4a79980b017639fea9d1"
        },
        {
          "url": "https://git.kernel.org/stable/c/806409f12fdb14c9e4c56a64494c9b75f356cd49"
        },
        {
          "url": "https://git.kernel.org/stable/c/dde5b9c91e9fc64e54a2f186d3ae95868b4dbb02"
        },
        {
          "url": "https://git.kernel.org/stable/c/efe7f25dd27e35063477b4b0e7eed3675669fd99"
        },
        {
          "url": "https://git.kernel.org/stable/c/2550f89589caad7402d618d7dffc038582c94b6b"
        },
        {
          "url": "https://git.kernel.org/stable/c/c2b8a624911999399cc14822fec3e35032b3cee4"
        },
        {
          "url": "https://git.kernel.org/stable/c/088eaa92fcebaa6b957ccf9635afdf39643a577d"
        }
      ],
      "title": "mmc: via-sdmmc: stop card-detect handling on probe failure",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89440",
    "datePublished": "2026-09-11T19:43:09.402Z",
    "dateReserved": "2026-09-11T19:38:34.703Z",
    "dateUpdated": "2026-09-14T11:59:51.359Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.