{"api_version":"1","generated_at":"2026-10-27T06:05:16+00:00","cve":"CVE-2026-90402","urls":{"html":"https://cve.report/CVE-2026-90402","api":"https://cve.report/api/cve/CVE-2026-90402.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90402","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90402"},"summary":{"title":"bus: mhi: host: Fix controller cleanup on EDL sysfs failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbus: mhi: host: Fix controller cleanup on EDL sysfs failure\n\nmhi_register_controller() adds the controller device before creating the\noptional trigger_edl sysfs file. If sysfs_create_file() fails, the error\npath only drops the device reference and leaves the device registered.\n\nHence, call device_del() in the error path before put_device().","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:39","updated_at":"2026-10-19 09:19:34"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/7943dc67250fad6ceac0dd089c6ad5776e4be71d","name":"https://git.kernel.org/stable/c/7943dc67250fad6ceac0dd089c6ad5776e4be71d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4743959aa8d876b5b456a62e8a62eb770db7afe9","name":"https://git.kernel.org/stable/c/4743959aa8d876b5b456a62e8a62eb770db7afe9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0d5b9e66591d4e2a4376ac82c8cda889a29ba3ee","name":"https://git.kernel.org/stable/c/0d5b9e66591d4e2a4376ac82c8cda889a29ba3ee","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4fb17a7c437f145353e93e6a9791f6db70e1cc63","name":"https://git.kernel.org/stable/c/4fb17a7c437f145353e93e6a9791f6db70e1cc63","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90402","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90402","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 17553ba8e19dee8770b3dcc597d49dcc3418f3b0 7943dc67250fad6ceac0dd089c6ad5776e4be71d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 17553ba8e19dee8770b3dcc597d49dcc3418f3b0 4fb17a7c437f145353e93e6a9791f6db70e1cc63 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 17553ba8e19dee8770b3dcc597d49dcc3418f3b0 4743959aa8d876b5b456a62e8a62eb770db7afe9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 17553ba8e19dee8770b3dcc597d49dcc3418f3b0 0d5b9e66591d4e2a4376ac82c8cda889a29ba3ee git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.10","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.10 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"90402","cve":"CVE-2026-90402","epss":"0.001210000","percentile":"0.022190000","score_date":"2026-09-21","updated_at":"2026-09-22 00:03:19"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/bus/mhi/host/init.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"7943dc67250fad6ceac0dd089c6ad5776e4be71d","status":"affected","version":"17553ba8e19dee8770b3dcc597d49dcc3418f3b0","versionType":"git"},{"lessThan":"4fb17a7c437f145353e93e6a9791f6db70e1cc63","status":"affected","version":"17553ba8e19dee8770b3dcc597d49dcc3418f3b0","versionType":"git"},{"lessThan":"4743959aa8d876b5b456a62e8a62eb770db7afe9","status":"affected","version":"17553ba8e19dee8770b3dcc597d49dcc3418f3b0","versionType":"git"},{"lessThan":"0d5b9e66591d4e2a4376ac82c8cda889a29ba3ee","status":"affected","version":"17553ba8e19dee8770b3dcc597d49dcc3418f3b0","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/bus/mhi/host/init.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.10"},{"lessThan":"6.10","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","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":"6.12.110","versionStartIncluding":"6.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"6.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"6.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"6.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbus: mhi: host: Fix controller cleanup on EDL sysfs failure\n\nmhi_register_controller() adds the controller device before creating the\noptional trigger_edl sysfs file. If sysfs_create_file() fails, the error\npath only drops the device reference and leaves the device registered.\n\nHence, call device_del() in the error path before put_device()."}],"metrics":[{"cvssV3_1":{"baseScore":7,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The missing device_del() is in mhi_register_controller() after device_add(), reached from mhi_pci_probe() for EDL-capable PCI WWAN controllers that set edl_trigger (Qualcomm SDX/QDU). The leftover mhi_dev is then opened via local sysfs; sysfs_create_file(trigger_edl) is not fed by a remote protocol message.\nAC:H - The broken err_release_dev path runs only when sysfs_create_file(&mhi_dev->dev.kobj, &dev_attr_trigger_edl.attr) fails after device_add() succeeded. That helper fails on kernfs errors such as -ENOMEM; a later mhi_pci_probe retries device_add(\"mhi%d\") and gets -EEXIST instead, so the attacker cannot reliably re-enter this exact failure.\nPR:L - device_add() installs mhi_dev_groups before trigger_edl is created, so serial_number and oem_pk_hash exist as DEVICE_ATTR_RO (0444) on /sys/bus/mhi/devices/mhiN/. After probe failure those files remain; an unprivileged local user can read them with no CAP_SYS_ADMIN and no user-namespace capability.\nUI:N - The attacker reads the leftover /sys/bus/mhi/devices/mhiN/serial_number or oem_pk_hash (or writes soc_reset) themselves. No second user must plug the WWAN card, mount media, or confirm a prompt.\nS:U - On the failed mhi_pci_probe(), device_unbind_cleanup() frees mhi_pdev via devres_release_all() while the still-registered mhi_dev stays a child of the PCI device. That is a host-kernel use-after-free of struct mhi_controller, not a VM, IOMMU, or sandbox escape.\nC:H - Without device_del(), mhi_dev remains in sysfs with mhi_dev->mhi_cntrl pointing at mhi_pdev freed on probe failure. serial_number_show reads mhi_cntrl->serial_number from that freed object, and oem_pk_hash_show calls mhi_read_reg() on it, disclosing kernel memory.\nI:H - oem_pk_hash_show calls mhi_read_reg(), which invokes the freed mhi_cntrl->read_reg function pointer; soc_reset_store calls mhi_soc_reset() which uses mhi_cntrl->write_reg/reset. Replacing the freed struct mhi_controller yields an arbitrary call/write primitive for control-flow hijack.\nA:H - serial_number_show, oem_pk_hash_show, and soc_reset_store dereference the dangling mhi_cntrl and oops or panic. The leaked device also keeps the mhiN name while ida_free() reuses the index, so a later mhi_register_controller() device_add() fails until reboot."}]}],"providerMetadata":{"dateUpdated":"2026-10-19T09:03:06.272Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/7943dc67250fad6ceac0dd089c6ad5776e4be71d"},{"url":"https://git.kernel.org/stable/c/4fb17a7c437f145353e93e6a9791f6db70e1cc63"},{"url":"https://git.kernel.org/stable/c/4743959aa8d876b5b456a62e8a62eb770db7afe9"},{"url":"https://git.kernel.org/stable/c/0d5b9e66591d4e2a4376ac82c8cda889a29ba3ee"}],"title":"bus: mhi: host: Fix controller cleanup on EDL sysfs failure","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90402","datePublished":"2026-09-17T16:09:32.194Z","dateReserved":"2026-09-11T19:38:34.811Z","dateUpdated":"2026-10-19T09:03:06.272Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:39","lastModifiedDate":"2026-10-19 09:19:34","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90402","Ordinal":"1","Title":"bus: mhi: host: Fix controller cleanup on EDL sysfs failure","CVE":"CVE-2026-90402","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90402","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nbus: mhi: host: Fix controller cleanup on EDL sysfs failure\n\nmhi_register_controller() adds the controller device before creating the\noptional trigger_edl sysfs file. If sysfs_create_file() fails, the error\npath only drops the device reference and leaves the device registered.\n\nHence, call device_del() in the error path before put_device().","Type":"Description","Title":"bus: mhi: host: Fix controller cleanup on EDL sysfs failure"}]}}}