CVE-2026-64003

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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"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-64003", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T15:35:05.354063Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-400", "description": "CWE-400 Uncontrolled Resource Consumption"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T20:18:02.511Z"}}]}}

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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."}], "id": "CVE-2026-64003", "lastModified": "2026-10-19T21:17:18.173", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64003", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:35:05.354063Z", "version": "2.0.3"}}]}, "published": "2026-07-19T16:17:39.933", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/15fb19af49f2073ed77fad16aaabc648b0ca6800"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/475f2b37a78f4c698967a7f14f325f04e24c9175"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7205b58702273baf21d6ba7992e6ba15852325f7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c740e13e7fe32d8e4d9a1699f65b8daf6709895a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d4dddfecdbb5467bef158d4e1486459808357fef"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-772"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-400"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: scsi: core: Run queues for all non-SDEV_DEL devices from scsi_run_host_queues", "id": "2502464", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502464"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nscsi: core: Run queues for all non-SDEV_DEL devices from scsi_run_host_queues\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.\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.\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.", "A flaw was found in the Linux kernel's SCSI (Small Computer System Interface) core. During a SCSI host recovery, the `scsi_run_host_queues()` function may incorrectly ignore devices that are in a partially removed state. This oversight can cause pending requests for these devices to become stuck, leading to a hang in the device removal process. The primary consequence is a Denial of Service (DoS), as affected devices cannot be properly removed from the system."], "name": "CVE-2026-64003", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64003\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64003\nhttps://lore.kernel.org/linux-cve-announce/2026071907-CVE-2026-64003-a0d3@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b566edbdbfb5cde31a322c57932694ff48125ed,15fb19af49f2073ed77fad16aaabc648b0ca6800)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b566edbdbfb5cde31a322c57932694ff48125ed,d4dddfecdbb5467bef158d4e1486459808357fef)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b566edbdbfb5cde31a322c57932694ff48125ed,475f2b37a78f4c698967a7f14f325f04e24c9175)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b566edbdbfb5cde31a322c57932694ff48125ed,c740e13e7fe32d8e4d9a1699f65b8daf6709895a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8b566edbdbfb5cde31a322c57932694ff48125ed,7205b58702273baf21d6ba7992e6ba15852325f7)"}}], "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": "6.5"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.5)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.143,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.93,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.35,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.12,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "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": "2026-07-21T08:15:02.136848+00:00", "updated": "2026-10-20T09:45:06.520695+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-400", "CWE-772"]}