CVE-2026-31650

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31650", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.128Z", "datePublished": "2026-04-24T14:45:03.210Z", "dateUpdated": "2026-10-21T12:39:38.649Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:39:38.649Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: vub300: fix use-after-free on disconnect\n\nThe vub300 driver maintains an explicit reference count for the\ncontroller and its driver data and the last reference can in theory be\ndropped after the driver has been unbound.\n\nThis specifically means that the controller allocation must not be\ndevice managed as that can lead to use-after-free.\n\nNote that the lifetime is currently also incorrectly tied the parent USB\ndevice rather than interface, which can lead to memory leaks if the\ndriver is unbound without its device being physically disconnected (e.g.\non probe deferral).\n\nFix both issues by reverting to non-managed allocation of the controller."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/mmc/host/vub300.c"], "versions": [{"version": "117a9c589ce0cf68065c007a02fd94da01e1181a", "lessThan": "4b5251eebc2b1dedbb33fedf1b1109fea161b846", "status": "affected", "versionType": "git"}, {"version": "dcfdd698dc521c6046e9b80c16281575efb25d23", "lessThan": "ea7468f61be033f4e18b95f2912010ed1d175d75", "status": "affected", "versionType": "git"}, {"version": "dcfdd698dc521c6046e9b80c16281575efb25d23", "lessThan": "ef0448c569b37ceabdd038e9faa311e5179127b0", "status": "affected", "versionType": "git"}, {"version": "dcfdd698dc521c6046e9b80c16281575efb25d23", "lessThan": "8f4d20a710225ec7a565f6a0459862d3b1f32330", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/mmc/host/vub300.c"], "versions": [{"version": "6.17", "status": "affected"}, {"version": "0", "lessThan": "6.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.23", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.13", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "6.17", "versionEndExcluding": "6.18.23"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "6.19.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4b5251eebc2b1dedbb33fedf1b1109fea161b846"}, {"url": "https://git.kernel.org/stable/c/ea7468f61be033f4e18b95f2912010ed1d175d75"}, {"url": "https://git.kernel.org/stable/c/ef0448c569b37ceabdd038e9faa311e5179127b0"}, {"url": "https://git.kernel.org/stable/c/8f4d20a710225ec7a565f6a0459862d3b1f32330"}], "title": "mmc: vub300: fix use-after-free on disconnect", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/mmc/host/vub300.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4b5251eebc2b1dedbb33fedf1b1109fea161b846", "status": "affected", "version": "117a9c589ce0cf68065c007a02fd94da01e1181a", "versionType": "git"}, {"lessThan": "ea7468f61be033f4e18b95f2912010ed1d175d75", "status": "affected", "version": "dcfdd698dc521c6046e9b80c16281575efb25d23", "versionType": "git"}, {"lessThan": "ef0448c569b37ceabdd038e9faa311e5179127b0", "status": "affected", "version": "dcfdd698dc521c6046e9b80c16281575efb25d23", "versionType": "git"}, {"lessThan": "8f4d20a710225ec7a565f6a0459862d3b1f32330", "status": "affected", "version": "dcfdd698dc521c6046e9b80c16281575efb25d23", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/mmc/host/vub300.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.17"}, {"lessThan": "6.17", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.23", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.13", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0DC92196-2D7B-4F07-A19F-B43E0624C441", "versionEndExcluding": "6.18.23", "versionStartIncluding": "6.17.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1490EF9B-9080-481C-8D22-1306AAE664E4", "versionEndExcluding": "6.19.13", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:-:*:*:*:*:*:*", "matchCriteriaId": "7CC8B11D-82DC-4958-8DC7-BF5CC829A5E9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: vub300: fix use-after-free on disconnect\n\nThe vub300 driver maintains an explicit reference count for the\ncontroller and its driver data and the last reference can in theory be\ndropped after the driver has been unbound.\n\nThis specifically means that the controller allocation must not be\ndevice managed as that can lead to use-after-free.\n\nNote that the lifetime is currently also incorrectly tied the parent USB\ndevice rather than interface, which can lead to memory leaks if the\ndriver is unbound without its device being physically disconnected (e.g.\non probe deferral).\n\nFix both issues by reverting to non-managed allocation of the controller."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nmmc: vub300: corregir uso despu\u00e9s de liberaci\u00f3n al desconectar\n\nEl controlador vub300 mantiene un conteo de referencias expl\u00edcito para el controlador y sus datos de controlador y la \u00faltima referencia puede en teor\u00eda ser liberada despu\u00e9s de que el controlador haya sido desvinculado.\n\nEsto significa espec\u00edficamente que la asignaci\u00f3n del controlador no debe ser gestionada por el dispositivo, ya que eso puede llevar a uso despu\u00e9s de liberaci\u00f3n.\n\nTenga en cuenta que la vida \u00fatil est\u00e1 actualmente tambi\u00e9n incorrectamente ligada al dispositivo USB padre en lugar de a la interfaz, lo que puede llevar a fugas de memoria si el controlador es desvinculado sin que su dispositivo sea f\u00edsicamente desconectado (p. ej., en aplazamiento de sondeo).\n\nCorregir ambos problemas revirtiendo a la asignaci\u00f3n no gestionada del controlador."}], "id": "CVE-2026-31650", "lastModified": "2026-11-11T23:10:00.263", "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": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-04-24T15:16:44.473", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4b5251eebc2b1dedbb33fedf1b1109fea161b846"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8f4d20a710225ec7a565f6a0459862d3b1f32330"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ea7468f61be033f4e18b95f2912010ed1d175d75"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ef0448c569b37ceabdd038e9faa311e5179127b0"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: mmc: vub300: fix use-after-free on disconnect", "id": "2461437", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461437"}, "csaw": false, "cwe": "CWE-911", "details": ["A flaw was found in the `vub300` driver within the Linux kernel. This vulnerability is a memory management issue where the system attempts to use memory that has already been freed, known as a 'use-after-free' error. This can happen when the driver is disconnected, potentially leading to system crashes or a denial of service. Additionally, the driver's incorrect handling of memory resources can cause memory leaks, which might degrade system performance over time."], "name": "CVE-2026-31650", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31650\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31650\nhttps://lore.kernel.org/linux-cve-announce/2026042400-CVE-2026-31650-fb3f@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[dcfdd698dc521c6046e9b80c16281575efb25d23,ea7468f61be033f4e18b95f2912010ed1d175d75)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[dcfdd698dc521c6046e9b80c16281575efb25d23,ef0448c569b37ceabdd038e9faa311e5179127b0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[dcfdd698dc521c6046e9b80c16281575efb25d23,8f4d20a710225ec7a565f6a0459862d3b1f32330)"}}], "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": "6.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.23,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.13,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "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"}], "analysis": {"en": {"generated_at": "2026-04-28T13:48:11.355575+00:00", "value": {"mitigation_remediation": ["Upgrade to a kernel version that includes the patch (Linux kernel 6.17 or later, or any 7.0 release candidate after the commit).", "Recompile and install the patched kernel on all affected systems if a custom kernel is in use.", "Temporarily unload or blacklist the vub300 module to prevent its loading until the patch can be applied."], "summary": {"action": "Immediate Patch", "impact": "Use-After\u2011Free"}, "threat_synthesis": {"affected_systems": "Linux kernel versions 6.17 and all 7.0 release candidates (rc1 through rc7) that load the vub300 driver are impacted. Any system that plugs a USB device supported by this driver while the kernel versions above are in use is vulnerable.", "description_and_impact": "The mmc: vub300 driver in the Linux kernel contains a use\u2011after\u2011free bug that can trigger during controller disconnect or driver unbind. The flaw stems from device\u2011managed allocation of the controller and an incorrect lifetime tied to the parent USB device rather than the interface, potentially leaving a dangling pointer. This use\u2011after\u2011free maps to CWE\u2011416 and the lifetime mishandling can lead to memory leaks (CWE\u2011911). An attacker could exploit the freed memory to corrupt kernel state, leading to a crash or possible escalation. The CVSS score of 7.8 highlights the high severity of this issue.", "risk_and_exploitability": "The EPSS score is less than 1%, indicating a very low current exploitation probability, and the vulnerability is not listed in the CISA KEV catalog. The attack vector is most likely local: an attacker must trigger a disconnect or unbind operation on a device using the vub300 driver to provoke the use\u2011after\u2011free. Successful exploitation would result in kernel memory corruption or a denial of service. Because the flaw is a classic use\u2011after\u2011free (CWE\u2011416) with additional lifetime mismanagement (CWE\u2011911), exploitation would require careful timing but could lead to privilege escalation if kernel memory is corrupted."}}}}, "created": "2026-04-27T21:45:14.292763+00:00", "updated": "2026-04-28T14:00:16.489007+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}