205 lines
12 KiB
JSON
205 lines
12 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-97527",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-24T16:01:01.152Z",
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"datePublished": "2026-09-25T10:21:29.521Z",
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"dateUpdated": "2026-10-21T12:53:02.776Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-21T12:53:02.776Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock\n\nThe fcport->unsol_ctx_head list is modified from several contexts without\na common lock. Entries are added in qla2xxx_process_purls_iocb() from the\nresponse queue ISR (under the qpair qp_lock), while they are removed from\nqla2xxx_process_purls_pkt() (DPC/purex worker), qla_nvme_xmt_ls_rsp()\n(NVMe-FC transport callback) and qla_nvme_release_lsrsp_cmd_kref() (SRB\ncompletion). The qpair qp_lock cannot serialize this per-fcport list since\nmultiqueue adapters add entries through different qpairs, so a concurrent\nadd and delete (or two concurrent deletes) can corrupt the list pointers.\n\nIntroduce a dedicated per-fcport spinlock, unsol_ctx_lock, initialized in\nqla2x00_alloc_fcport(), and take it around every list_add_tail()/list_del()\non unsol_ctx_head. The add nests under the existing qp_lock; no delete path\ntakes qp_lock, so the lock order is consistent and deadlock free."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:A - qla24xx_msix_rsp_q/qla2xxx_msix_rsp_q → qla24xx_process_response_queue dispatches PT_LS4_UNSOL (0x56) into qla2xxx_process_purls_iocb, which list_add_tail's uctx onto fcport->unsol_ctx_head. Those are unsolicited NVMe-FC LS frames a SAN N_Port put on the wire. FC/FCoE is a non-routable fabric, so Adjacent.\nAC:L - A fabric peer floods concurrent PT_LS4_UNSOL so ISR list_add_tail in qla2xxx_process_purls_iocb (qp_lock only; different qpairs on MQ) races list_del in qla2xxx_process_purls_pkt (DPC; nvme_fc_rcv_ls_req -E2BIG on oversized LS), qla_nvme_xmt_ls_rsp, or qla_nvme_release_lsrsp_cmd_kref. The attacker drives both sides.\nPR:N - qla2xxx_process_purls_iocb only needs qla2x00_find_fcport_by_nportid to match a non-deleted N_Port that completed NVMe PRLI (nvme_remote_port). The PT_LS4_UNSOL path has no uid, capability, or EDIF check; fabric zoning is network access, not a host privilege.\nUI:N - PT_LS4_UNSOL is consumed in the MSI-X response-queue handler and queued via qla24xx_queue_purex_item to PROCESS_PUREX_IOCB; nvme_fc later calls qla_nvme_xmt_ls_rsp from lsrcv_work. No victim mount, open, or other interactive step is required.\nS:U - Corrupting fcport->unsol_ctx_head and the qla_nvme_unsol_ctx list nodes stays inside the host kernel that owns the qla2xxx adapter. This is not a VM escape, IOMMU bypass, or other cross-authority impact.\nC:H - Unlocked list_add_tail versus list_del on unsol_ctx_head can leave head->prev pointing at a qla_nvme_unsol_ctx that qla2xxx_process_purls_pkt already kfree'd, so the next add writes through freed slab. Reuse of that uctx is an arbitrary kernel read primitive.\nI:H - The same race lets list_del write prev/next of a neighbor uctx or the list head through a stale pointer, and a second delete of a poisoned node writes LIST_POISON or a reused object, which is a kernel write and control-flow hijack primitive.\nA:H - list_del on a corrupted unsol_ctx_head hits LIST_POISON or a bad dereference in qla2xxx_process_purls_pkt, qla_nvme_xmt_ls_rsp, or qla_nvme_release_lsrsp_cmd_kref and oopses or panics the host, taking down the NVMe-FC path."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/scsi/qla2xxx/qla_def.h",
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"drivers/scsi/qla2xxx/qla_init.c",
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"drivers/scsi/qla2xxx/qla_nvme.c"
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],
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"versions": [
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{
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"version": "875386b98857822b77ac7f95bdf367b70af5b78c",
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"lessThan": "6c71726cdfda93ae169a75c7b1697eb870303125",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "875386b98857822b77ac7f95bdf367b70af5b78c",
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"lessThan": "c1ee12eecbab9674fb73c9e00a93fac655d5a5dc",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "875386b98857822b77ac7f95bdf367b70af5b78c",
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"lessThan": "b211d138cad86f749826d6132db6388eded992d8",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "875386b98857822b77ac7f95bdf367b70af5b78c",
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"lessThan": "4d8ad6bc8cc5eff1870cef00a0d611f38f8b6bd0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "875386b98857822b77ac7f95bdf367b70af5b78c",
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"lessThan": "76da0c43c63eb0496649e372ac64466364d0fe7d",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/scsi/qla2xxx/qla_def.h",
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"drivers/scsi/qla2xxx/qla_init.c",
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"drivers/scsi/qla2xxx/qla_nvme.c"
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],
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"versions": [
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{
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"version": "6.6",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.6",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.112",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.53",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.7",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6",
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"versionEndExcluding": "6.6.160"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6",
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"versionEndExcluding": "6.12.112"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6",
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"versionEndExcluding": "6.18.53"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6",
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"versionEndExcluding": "7.2.7"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.6",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/6c71726cdfda93ae169a75c7b1697eb870303125"
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},
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{
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"url": "https://git.kernel.org/stable/c/c1ee12eecbab9674fb73c9e00a93fac655d5a5dc"
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},
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{
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"url": "https://git.kernel.org/stable/c/b211d138cad86f749826d6132db6388eded992d8"
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},
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{
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"url": "https://git.kernel.org/stable/c/4d8ad6bc8cc5eff1870cef00a0d611f38f8b6bd0"
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},
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{
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"url": "https://git.kernel.org/stable/c/76da0c43c63eb0496649e372ac64466364d0fe7d"
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}
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],
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"title": "scsi: qla2xxx: Serialize NVMe unsol ctx list with a per-fcport lock",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |