{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-40342", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.187Z", "datePublished": "2025-12-09T04:09:59.673Z", "dateUpdated": "2026-08-05T12:09:44.878Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:09:44.878Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-fc: use lock accessing port_state and rport state\n\nnvme_fc_unregister_remote removes the remote port on a lport object at\nany point in time when there is no active association. This races with\nwith the reconnect logic, because nvme_fc_create_association is not\ntaking a lock to check the port_state and atomically increase the\nactive count on the rport." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - Both halves of the race are driven by a remote NVMe-FC peer over the Fibre Channel fabric — target logout/RSCN triggers `nvme_fc_unregister_remoteport()` while association failure triggers the host's reconnect worker — so no host access is needed, but FC/FCoE is a limited, non-routable storage network requiring the attacker to be attached to the same fabric.\nAC:L - The attacker controls both sides of the race and can repeat login/logout plus association-failure cycles indefinitely, and the host's reconnect logic re-enters `nvme_fc_create_association()` automatically on every cycle, so the window is hit reliably given enough iterations.\nPR:N - FC-NVMe performs no peer authentication — fabric zoning is the only access control — so a rogue or compromised port on the SAN needs no credentials or account on the victim host to drive the port-state transitions.\nUI:N - The reconnect path runs entirely in kernel workqueue context (`nvme_fc_connect_ctrl_work`) in response to fabric events; no administrator or user action on the victim is required.\nS:U - The corruption is confined to kernel objects owned by the nvme-fc transport and the FC HBA driver within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The double `remoteport_delete()` causes a refcount underflow and premature free of the LLDD node structure (lpfc `ndlp`, qla2xxx `fcport`) while the transport continues to dereference it, and such a use-after-free on a heap object gives an attacker able to groom the slab an arbitrary kernel read primitive.\nI:H - The same use-after-free/double-put lets a reclaimed allocation be written through stale transport pointers and function-pointer-bearing structures (`lport->ops`, `rport->ndlp`), which is exploitable for arbitrary write and control-flow hijack.\nA:H - Even unweaponized, the double free and continued use of a torn-down remote port reliably produce kref underflow warnings, KASAN use-after-free splats, and kernel panics, taking down storage-attached hosts." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/nvme/host/fc.c" ], "versions": [ { "version": "e399441de9115cd472b8ace6c517708273ca7997", "lessThan": "de3d91af47bc015031e7721b100a29989f6498a5", "status": "affected", "versionType": "git" }, { "version": "e399441de9115cd472b8ace6c517708273ca7997", "lessThan": "e8cde03de8674b05f2c5e0870729049eba517800", "status": "affected", "versionType": "git" }, { "version": "e399441de9115cd472b8ace6c517708273ca7997", "lessThan": "4253e0a4546138a2bf9cb6acf66b32fee677fc7c", "status": "affected", "versionType": "git" }, { "version": "e399441de9115cd472b8ace6c517708273ca7997", "lessThan": "25f4bf1f7979a7871974fd36c79d69ff1cf4b446", "status": "affected", "versionType": "git" }, { "version": "e399441de9115cd472b8ace6c517708273ca7997", "lessThan": "9950af4303942081dc8c7a5fdc3688c17c7eb6c0", "status": "affected", "versionType": "git" }, { "version": "e399441de9115cd472b8ace6c517708273ca7997", "lessThan": "a2f7fa75c4a2a07328fa22ccbef461db76790b55", "status": "affected", "versionType": "git" }, { "version": "e399441de9115cd472b8ace6c517708273ca7997", "lessThan": "891cdbb162ccdb079cd5228ae43bdeebce8597ad", "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/nvme/host/fc.c" ], "versions": [ { "version": "4.10", "status": "affected" }, { "version": "0", "lessThan": "4.10", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.247", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.197", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.159", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.117", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.58", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.8", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18", "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": "4.10", "versionEndExcluding": "5.10.247" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "5.15.197" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.1.159" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.6.117" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.12.58" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.17.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.18" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/de3d91af47bc015031e7721b100a29989f6498a5" }, { "url": "https://git.kernel.org/stable/c/e8cde03de8674b05f2c5e0870729049eba517800" }, { "url": "https://git.kernel.org/stable/c/4253e0a4546138a2bf9cb6acf66b32fee677fc7c" }, { "url": "https://git.kernel.org/stable/c/25f4bf1f7979a7871974fd36c79d69ff1cf4b446" }, { "url": "https://git.kernel.org/stable/c/9950af4303942081dc8c7a5fdc3688c17c7eb6c0" }, { "url": "https://git.kernel.org/stable/c/a2f7fa75c4a2a07328fa22ccbef461db76790b55" }, { "url": "https://git.kernel.org/stable/c/891cdbb162ccdb079cd5228ae43bdeebce8597ad" } ], "title": "nvme-fc: use lock accessing port_state and rport state", "x_generator": { "engine": "bippy-1.2.0" } } } }