243 lines
13 KiB
JSON
243 lines
13 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-2026-90228",
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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": "2026-09-11T19:38:34.794Z",
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"datePublished": "2026-09-17T16:07:36.625Z",
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"dateUpdated": "2026-10-19T09:00:04.748Z"
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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": "2026-10-19T09:00:04.748Z"
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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\nnvmet: fix NULL pointer dereference in nvmet_execute_identify_ns_zns()\n\nWhen a host issues an Identify command with CNS 05h (I/O Command Set\nspecific Identify Namespace) and CSI 02h (ZNS) targeting a file-backed\nnamespace, nvmet_execute_identify_ns_zns() calls bdev_is_zoned() on\nreq->ns->bdev. A file-backed namespace has no block device, so\nreq->ns->bdev is NULL and bdev_is_zoned() dereferences it, oopsing.\n\nThe I/O command set is selected by the host-supplied CSI field and the\ncommand is routed here whenever CONFIG_BLK_DEV_ZONED is enabled,\nindependent of the namespace backing type, so any file-backed namespace\nis exposed.\n\nReject the command with Invalid Field when the namespace is not backed\nby a block device."
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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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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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:N - The host-controlled Identify capsule (opcode nvme_admin_identify) carries CNS 05h (NVME_ID_CNS_CS_NS) and CSI 02h (NVME_CSI_ZNS); nvmet-tcp receives that CapsuleCmd in nvmet_tcp_done_recv_pdu() after kernel_accept() and dispatches via nvmet_parse_admin_cmd()/nvmet_execute_identify() into nvmet_execute_identify_ns_zns().\nAC:L - The attacker sets identify.cns and identify.csi on Identify for any enabled file-backed NSID; nvmet_execute_identify() routes CSI=ZNS to nvmet_execute_identify_ns_zns() whenever CONFIG_BLK_DEV_ZONED is built in, then bdev_is_zoned(req->ns->bdev) hits NULL with no race or layout dependency.\nPR:N - nvmet_check_ctrl_status() after Connect/CC.EN only enforces DH-HMAC-CHAP when a host_key exists; nvmet_check_auth_status() otherwise returns true, nvmet_host_allowed() treats host NQN as an asserted identifier, and allow_any_host subsystems accept any initiator with no Linux credentials.\nUI:N - The remote initiator itself sends Connect, Property Set of CC.EN, then the crafted Identify; no local user must mount a device, open a file, or otherwise interact.\nS:U - The oops occurs in the target kernel's nvmet-tcp worker while executing nvmet_execute_identify_ns_zns() and stays in that host's kernel authority; it is not a VM escape or IOMMU/sandbox boundary bypass.\nC:N - bdev_is_zoned() only loads bdev->bd_queue through the NULL ns->bdev of a file-backed namespace; nvmet_execute_identify_ns_zns() crashes before nvmet_copy_to_sgl() of the identify buffer, so no kernel data is returned.\nI:N - The fault is a NULL read in bdev_get_queue() via bdev_is_zoned(); no kernel object is overwritten and a pure NULL dereference does not yield a write or control-flow primitive.\nA:H - Calling bdev_is_zoned(req->ns->bdev) with a NULL file-backed bdev in nvmet_execute_identify_ns_zns() oopses the kernel, crashing the NVMe target."
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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/nvme/target/zns.c"
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],
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"versions": [
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{
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"version": "aaf2e048af2704da5869f27b508b288f36d5c7b7",
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"lessThan": "1ce8faf90eb0bf5599b90db38500aefea9426485",
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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": "aaf2e048af2704da5869f27b508b288f36d5c7b7",
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"lessThan": "b873099944dae5702b4b6db6814d1f1e8d4cfb00",
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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": "aaf2e048af2704da5869f27b508b288f36d5c7b7",
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"lessThan": "ff28a93a895912010a7827a0e1445ebe8be53b4d",
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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": "aaf2e048af2704da5869f27b508b288f36d5c7b7",
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"lessThan": "cc29f7082b7ab5e0337f27d1fef16359f05fcffa",
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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": "aaf2e048af2704da5869f27b508b288f36d5c7b7",
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"lessThan": "1fb1236312ee1a600de6b3ca560f0b3fd5a50471",
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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": "aaf2e048af2704da5869f27b508b288f36d5c7b7",
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"lessThan": "0b4cf43f9ca7118590a338de900edbd6047cd89f",
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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": "aaf2e048af2704da5869f27b508b288f36d5c7b7",
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"lessThan": "f594863967d87b7fcbff6e724d51135fd701a13d",
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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/nvme/target/zns.c"
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],
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"versions": [
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{
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"version": "5.14",
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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": "5.14",
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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": "5.15.221",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.188",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.157",
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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": "6.12.110",
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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": "6.18.52",
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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": "7.2.6",
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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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"nodes": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.14",
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"versionEndExcluding": "5.15.221"
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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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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/1ce8faf90eb0bf5599b90db38500aefea9426485"
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},
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{
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"url": "https://git.kernel.org/stable/c/b873099944dae5702b4b6db6814d1f1e8d4cfb00"
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},
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{
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"url": "https://git.kernel.org/stable/c/ff28a93a895912010a7827a0e1445ebe8be53b4d"
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},
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{
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"url": "https://git.kernel.org/stable/c/cc29f7082b7ab5e0337f27d1fef16359f05fcffa"
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},
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{
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"url": "https://git.kernel.org/stable/c/1fb1236312ee1a600de6b3ca560f0b3fd5a50471"
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},
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{
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"url": "https://git.kernel.org/stable/c/0b4cf43f9ca7118590a338de900edbd6047cd89f"
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},
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{
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"url": "https://git.kernel.org/stable/c/f594863967d87b7fcbff6e724d51135fd701a13d"
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}
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],
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"title": "nvmet: fix NULL pointer dereference in nvmet_execute_identify_ns_zns()",
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"x_generator": {
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} |