CVE-2026-90268

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90268", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.796Z", "datePublished": "2026-09-17T16:08:03.312Z", "dateUpdated": "2026-10-19T09:00:45.863Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:00:45.863Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: sd: Fix error handling in sd_probe() after large pool creation failure\n\nAfter device_add(&sdkp->disk_dev) succeeds, sd_large_pool_create()\nfailure must unregister disk_dev and let scsi_disk_release() free\nsdkp. Going through out_free_index kfree()s an already registered device\nand leaks the sysfs entry."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - After iscsi_scan_session()->scsi_scan_target()->scsi_probe_and_add_lun() binds TYPE_DISK, sd_probe()->sd_revalidate_disk()->read_capacity_16() takes the Logical Block Length from the target\u2019s READ CAPACITY(16) Data-In at buffer[8] (or READ CAPACITY(10) at buffer[4]) over iSCSI TCP; that value is what enters the sd_large_pool_create() error path.\nAC:H - The bad goto is taken only when sd_large_page_pool is still NULL and mempool_create_page_pool(SD_MEMPOOL_SIZE=2, get_order(BLK_MAX_BLOCK_SIZE)) fails its GFP_KERNEL order-4 preallocation of two 64K pages; a remote target cannot force that allocator failure or whether an earlier large-sector disk already created the pool.\nPR:N - The attacker is the iSCSI target supplying INQUIRY PDT=TYPE_DISK and the READ CAPACITY block length during automatic LUN scan; scsi_bus_probe()->sd_probe() runs on the initiator with no capability check against the target, and iSCSI is commonly deployed without CHAP.\nUI:N - Once the session is ISCSI_SESSION_LOGGED_IN, iscsi_scan_session work calls scsi_scan_target, which invokes sd_probe and sd_revalidate_disk with no open(), mount, or operator action; the target alone presents the LUN and the capacity response.\nS:U - kfree(sdkp) while sdkp->disk_dev remains registered after device_add() corrupts only the initiator kernel\u2019s device-model/sysfs state for that scsi_disk; it does not cross a VM, IOMMU, or other security-authority boundary.\nC:H - out_free_index kfree()s the scsi_disk that embeds the still-registered disk_dev, so later sysfs reads of sd_disk_groups attributes via to_scsi_disk() and scsi_disk_release() operate on a freed heap object, giving a use-after-free read primitive.\nI:H - The same kfree leaves disk_dev, gd->private_data, and the sdev drvdata set by dev_set_drvdata() pointing at freed sdkp; writable scsi_disk sysfs stores and scsi_disk_release()\u2019s second kfree/ida_free then write through that UAF, enabling heap corruption and control-flow hijack.\nA:H - Use-after-free of the registered scsi_disk, including scsi_disk_release() running on already-freed memory (double-free of sdkp and a second ida_free of sdkp->index), oopses or panics when udev, sysfs, or parent sdev removal touches disk_dev."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/scsi/sd.c"], "versions": [{"version": "7179e626b76eb42f2529c6f6dd6ba88ea2445372", "lessThan": "748a14a0d41cfe3017251c11b314f85045414942", "status": "affected", "versionType": "git"}, {"version": "7179e626b76eb42f2529c6f6dd6ba88ea2445372", "lessThan": "e3cc6ea1a745e7f5d326f919a428b244fa119d8f", "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/scsi/sd.c"], "versions": [{"version": "7.1", "status": "affected"}, {"version": "0", "lessThan": "7.1", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "7.1", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/748a14a0d41cfe3017251c11b314f85045414942"}, {"url": "https://git.kernel.org/stable/c/e3cc6ea1a745e7f5d326f919a428b244fa119d8f"}], "title": "scsi: sd: Fix error handling in sd_probe() after large pool creation failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/scsi/sd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "748a14a0d41cfe3017251c11b314f85045414942", "status": "affected", "version": "7179e626b76eb42f2529c6f6dd6ba88ea2445372", "versionType": "git"}, {"lessThan": "e3cc6ea1a745e7f5d326f919a428b244fa119d8f", "status": "affected", "version": "7179e626b76eb42f2529c6f6dd6ba88ea2445372", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/scsi/sd.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.1"}, {"lessThan": "7.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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\nscsi: sd: Fix error handling in sd_probe() after large pool creation failure\n\nAfter device_add(&sdkp->disk_dev) succeeds, sd_large_pool_create()\nfailure must unregister disk_dev and let scsi_disk_release() free\nsdkp. Going through out_free_index kfree()s an already registered device\nand leaks the sysfs entry."}], "id": "CVE-2026-90268", "lastModified": "2026-10-19T09:19:20.410", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-17T17:17:23.360", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/748a14a0d41cfe3017251c11b314f85045414942"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e3cc6ea1a745e7f5d326f919a428b244fa119d8f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7179e626b76eb42f2529c6f6dd6ba88ea2445372,748a14a0d41cfe3017251c11b314f85045414942)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7179e626b76eb42f2529c6f6dd6ba88ea2445372,e3cc6ea1a745e7f5d326f919a428b244fa119d8f)"}}], "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": "generic", "value": "7.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.1)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"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": "2026-09-19T03:15:16.734599+00:00", "updated": "2026-09-19T15:15:14.216115+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416", "CWE-567"]}