{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-64003", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.026Z", "datePublished": "2026-07-19T14:56:20.172Z", "dateUpdated": "2026-08-05T12:38:03.750Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:38:03.750Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: core: Run queues for all non-SDEV_DEL devices from scsi_run_host_queues\n\nWhile a SCSI host is in a recovery state, scsi_mq_requeue_cmd() will not\nset the requeue list for a requeued command to be kicked in the future.\nThe expectation is a call to scsi_run_host_queues() will kick all SCSI\ndevices once the recovery state is cleared.\n\nHowever, scsi_run_host_queues() uses shost_for_each_device() which uses\nscsi_device_get() and so will ignore devices in a partially removed\nstate like SDEV_CANCEL. But these devices may also have requeued\nrequests, leaving their requests stuck from not being kicked and causing\nthe removal process of the device to hang.\n\nscsi_run_host_queues() needs to run against more devices than the macro\nshost_for_each_device() allows. Instead of using the too limiting\nscsi_device_get() state checks, only ignore devices in SDEV_DEL state or\nwhen unable to acquire a reference. Attempt to run the queues for all\nother devices when scsi_run_host_queues() is called." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - The bug is in the SCSI core midlayer reached after host error recovery; on enterprise servers using kernel iSCSI (iscsi_tcp/libiscsi), a remote storage target can inject SCSI failures and then drive session teardown that calls scsi_remove_target(), all over TCP without local access.\nAC:L - A malicious or compromised iSCSI peer controls both sides of the race by timing command failures, non-responsive task-management replies, and connection resets so SCSI EH recovery overlaps with device removal in SDEV_CANCEL.\nPR:N - Exploitation requires no privileges on the victim host; the attacker acts as the remote iSCSI endpoint on an already-established session and needs no CAP_SYS_ADMIN, sysfs writes, or ioctl access.\nUI:N - No end-user action is required during exploitation; recovery and removal are driven automatically by kernel SCSI/iSCSI error-handling once the session exists.\nS:U - Impact is a kernel hang during SCSI device teardown on the same host; it does not cross a VM, IOMMU, or sandbox security boundary.\nC:N - This is a queue-dispatch logic bug that leaves requeued requests stuck; there is no memory corruption, out-of-bounds access, or information disclosure.\nI:N - The flaw prevents requeued I/O from being kicked and blocks removal completion; it does not modify data or provide a write or code-execution primitive.\nA:H - Stuck requeued requests leave devices in SDEV_CANCEL with queues never kicked after recovery, causing the device removal path to hang indefinitely (deadlock), potentially blocking storage teardown, module unload, or shutdown." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/scsi_lib.c" ], "versions": [ { "version": "8b566edbdbfb5cde31a322c57932694ff48125ed", "lessThan": "15fb19af49f2073ed77fad16aaabc648b0ca6800", "status": "affected", "versionType": "git" }, { "version": "8b566edbdbfb5cde31a322c57932694ff48125ed", "lessThan": "d4dddfecdbb5467bef158d4e1486459808357fef", "status": "affected", "versionType": "git" }, { "version": "8b566edbdbfb5cde31a322c57932694ff48125ed", "lessThan": "475f2b37a78f4c698967a7f14f325f04e24c9175", "status": "affected", "versionType": "git" }, { "version": "8b566edbdbfb5cde31a322c57932694ff48125ed", "lessThan": "c740e13e7fe32d8e4d9a1699f65b8daf6709895a", "status": "affected", "versionType": "git" }, { "version": "8b566edbdbfb5cde31a322c57932694ff48125ed", "lessThan": "7205b58702273baf21d6ba7992e6ba15852325f7", "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/scsi_lib.c" ], "versions": [ { "version": "6.5", "status": "affected" }, { "version": "0", "lessThan": "6.5", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "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": "6.5", "versionEndExcluding": "6.6.143" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.12.93" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "6.18.35" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "7.0.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/15fb19af49f2073ed77fad16aaabc648b0ca6800" }, { "url": "https://git.kernel.org/stable/c/d4dddfecdbb5467bef158d4e1486459808357fef" }, { "url": "https://git.kernel.org/stable/c/475f2b37a78f4c698967a7f14f325f04e24c9175" }, { "url": "https://git.kernel.org/stable/c/c740e13e7fe32d8e4d9a1699f65b8daf6709895a" }, { "url": "https://git.kernel.org/stable/c/7205b58702273baf21d6ba7992e6ba15852325f7" } ], "title": "scsi: core: Run queues for all non-SDEV_DEL devices from scsi_run_host_queues", "x_generator": { "engine": "bippy-1.2.0" } } } }