{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89440", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.703Z", "datePublished": "2026-09-11T19:43:09.402Z", "dateUpdated": "2026-09-13T06:29:22.178Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-13T06:29:22.178Z"}, "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": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "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's 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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": 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"95025a8dd0ec015872f6c16473fe04d6264e68ca", "status": "affected", "versionType": "git"}, {"version": "f59ef2a47a228e51322ad76752a55a8917c56e38", "status": "affected", "versionType": "git"}, {"version": "63400da6cd37a9793c19bb6aed7131b58b975a04", "status": "affected", "versionType": "git"}, {"version": "0959cc1685eb19774300d43ef25e318b457b156b", "status": "affected", "versionType": "git"}, {"version": "0ec94795114edc7e24ec71849dce42bfa61dafa3", "status": "affected", "versionType": "git"}, {"version": "ba91b413983a9235792523c6b9f7ba2586c4d75d", "status": "affected", "versionType": "git"}, {"version": "4.9.337", "lessThan": "4.10", "status": "affected", "versionType": "semver"}, {"version": "4.14.303", "lessThan": "4.15", "status": "affected", "versionType": "semver"}, {"version": "4.19.270", "lessThan": "4.20", "status": "affected", "versionType": "semver"}, {"version": "5.4.229", "lessThan": "5.5", "status": "affected", "versionType": "semver"}, {"version": "5.10.163", "lessThan": "5.11", "status": "affected", "versionType": "semver"}, {"version": "5.15.86", "lessThan": "5.16", "status": "affected", "versionType": "semver"}, {"version": "6.0.16", "lessThan": "6.1", "status": "affected", "versionType": "semver"}, {"version": "6.1.2", "lessThan": "6.2", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/mmc/host/via-sdmmc.c"], "versions": [{"version": "6.2", "status": "affected"}, {"version": "0", "lessThan": "6.2", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.3-rc1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.337"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": 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{"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"}}}}

{}

{"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": "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": "63400da6cd37a9793c19bb6aed7131b58b975a04", "versionType": "git"}, {"status": "affected", "version": "0959cc1685eb19774300d43ef25e318b457b156b", "versionType": "git"}, {"status": "affected", "version": "0ec94795114edc7e24ec71849dce42bfa61dafa3", "versionType": "git"}, {"status": "affected", "version": "ba91b413983a9235792523c6b9f7ba2586c4d75d", "versionType": "git"}, {"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": "5.11", "status": "affected", "version": "5.10.163", "versionType": "semver"}, {"lessThan": "5.16", "status": "affected", "version": "5.15.86", "versionType": "semver"}, {"lessThan": "6.1", "status": "affected", "version": "6.0.16", "versionType": "semver"}, {"lessThan": "6.2", "status": "affected", "version": "6.1.2", "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": "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": "2026-09-13T07:17:08.490", "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/c2b8a624911999399cc14822fec3e35032b3cee4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/efe7f25dd27e35063477b4b0e7eed3675669fd99"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel mmc: via-sdmmc: Use-after-free vulnerability in SD card-detect handling", "id": "2532121", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532121"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's mmc: via-sdmmc component. During the probe process, if the `mmc_add_host()` function fails, the SD card-detect interrupt handler continues to operate on memory that has already been released. This can lead to memory corruption, potentially allowing a local attacker to cause system instability or execute unauthorized code."], "name": "CVE-2026-89440", "public_date": "2026-09-11T19:43:09Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89440\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89440\nhttps://git.kernel.org/stable/c/088eaa92fcebaa6b957ccf9635afdf39643a577d\nhttps://git.kernel.org/stable/c/2550f89589caad7402d618d7dffc038582c94b6b\nhttps://git.kernel.org/stable/c/c2b8a624911999399cc14822fec3e35032b3cee4\nhttps://git.kernel.org/stable/c/efe7f25dd27e35063477b4b0e7eed3675669fd99"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e4e46fb61e3bb4628170810d3f2b996b709b90d9,efe7f25dd27e35063477b4b0e7eed3675669fd99)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e4e46fb61e3bb4628170810d3f2b996b709b90d9,2550f89589caad7402d618d7dffc038582c94b6b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e4e46fb61e3bb4628170810d3f2b996b709b90d9,c2b8a624911999399cc14822fec3e35032b3cee4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e4e46fb61e3bb4628170810d3f2b996b709b90d9,088eaa92fcebaa6b957ccf9635afdf39643a577d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "076bcd2c93e16b05c10564e299d6e5d26a766d00"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "12b8e81b77c05c658efd9cde3585bbd65ae39b59"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "95025a8dd0ec015872f6c16473fe04d6264e68ca"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "f59ef2a47a228e51322ad76752a55a8917c56e38"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "63400da6cd37a9793c19bb6aed7131b58b975a04"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "0959cc1685eb19774300d43ef25e318b457b156b"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "0ec94795114edc7e24ec71849dce42bfa61dafa3"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "ba91b413983a9235792523c6b9f7ba2586c4d75d"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.9.337,4.10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.14.303,4.15)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[4.19.270,4.20)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.4.229,5.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.10.163,5.11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.15.86,5.16)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.0.16,6.1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.1.2,6.2)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T03:15:06.701584+00:00", "updated": "2026-09-13T09:00:13.560841+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}