CVE-2026-89975 (GCVE-0-2026-89975)
Vulnerability from cvelistv5 – Published: 2026-09-16 10:32 – Updated: 2026-10-30 12:33
VLAI
EPSS
VEX
Title
nvme-fabrics: fix DHCHAP secret leak on parse failure
Summary
In the Linux kernel, the following vulnerability has been resolved:
nvme-fabrics: fix DHCHAP secret leak on parse failure
nvmf_parse_options() duplicates dhchap_secret and dhchap_ctrl_secret
with match_strdup() before validating the DHHC-1: representation.
If validation fails, the parser returns -EINVAL before the temporary
string in p is assigned to opts->dhchap_secret or
opts->dhchap_ctrl_secret. nvmf_create_ctrl() subsequently frees opts,
but nvmf_free_options() cannot release the unassigned temporary string.
Each rejected option therefore leaks one allocation.
This is easy to miss because valid secrets transfer ownership to opts
and are freed normally, while the malformed-secret path still returns
the expected -EINVAL to userspace.
With CONFIG_NVME_HOST_AUTH enabled, the leak is reachable before the
required-option checks and transport lookup. No NVMe-oF target or
working transport connection is required; for example, repeatedly
writing
dhchap_secret=BAD
or
dhchap_ctrl_secret=BAD
to /dev/nvme-fabrics deterministically takes the leaking parse path.
Free the temporary string before leaving both validation error paths.
Use kfree_sensitive() because the copied option may contain secret
material even when its representation is rejected, matching the
sensitive cleanup used for stored DHCHAP secrets.
Severity
No CVSS data available.
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
f50fff73d620cd6e8f48bc58d4f1c944615a3fea , < 35ec48228f6739339583e5a73ca315156372e30d
(git)
Affected: f50fff73d620cd6e8f48bc58d4f1c944615a3fea , < 3ce0e9b43f355dfa0bdc0e0dd889795752285791 (git) Affected: f50fff73d620cd6e8f48bc58d4f1c944615a3fea , < 702c1ae0d31b44828ec3c87079def490c1ee1fb3 (git) Affected: f50fff73d620cd6e8f48bc58d4f1c944615a3fea , < 15d7a35a489287109b5a7c157d53d9b8214f0318 (git) Affected: f50fff73d620cd6e8f48bc58d4f1c944615a3fea , < d21da6cc91ba1c4f1ae5ba007f3cb89e1c0c7549 (git) Affected: f50fff73d620cd6e8f48bc58d4f1c944615a3fea , < afdee49a1b88ed9bb44e2b30e855297c169bcc53 (git) |
guessed | |
| Linux | Linux |
Affected:
6.0
Unaffected: 0 , < 6.0 (semver) Unaffected: 6.1.191 , ≤ 6.1.* (semver) Unaffected: 6.6.160 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.51 , ≤ 6.18.* (semver) Unaffected: 7.2.5 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
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{
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"product": "Linux",
"programFiles": [
"drivers/nvme/host/fabrics.c"
],
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},
{
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"product": "Linux",
"programFiles": [
"drivers/nvme/host/fabrics.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.0"
},
{
"lessThan": "6.0",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.1.191",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.18.51",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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{
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{
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{
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
{
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"versionEndExcluding": "7.3",
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}
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"negate": false,
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-fabrics: fix DHCHAP secret leak on parse failure\n\nnvmf_parse_options() duplicates dhchap_secret and dhchap_ctrl_secret\nwith match_strdup() before validating the DHHC-1: representation.\n\nIf validation fails, the parser returns -EINVAL before the temporary\nstring in p is assigned to opts-\u003edhchap_secret or\nopts-\u003edhchap_ctrl_secret. nvmf_create_ctrl() subsequently frees opts,\nbut nvmf_free_options() cannot release the unassigned temporary string.\nEach rejected option therefore leaks one allocation.\n\nThis is easy to miss because valid secrets transfer ownership to opts\nand are freed normally, while the malformed-secret path still returns\nthe expected -EINVAL to userspace.\n\nWith CONFIG_NVME_HOST_AUTH enabled, the leak is reachable before the\nrequired-option checks and transport lookup. No NVMe-oF target or\nworking transport connection is required; for example, repeatedly\nwriting\n\n\tdhchap_secret=BAD\n\nor\n\n\tdhchap_ctrl_secret=BAD\n\nto /dev/nvme-fabrics deterministically takes the leaking parse path.\n\nFree the temporary string before leaving both validation error paths.\nUse kfree_sensitive() because the copied option may contain secret\nmaterial even when its representation is rejected, matching the\nsensitive cleanup used for stored DHCHAP secrets."
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T12:33:39.796Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/35ec48228f6739339583e5a73ca315156372e30d"
},
{
"url": "https://git.kernel.org/stable/c/3ce0e9b43f355dfa0bdc0e0dd889795752285791"
},
{
"url": "https://git.kernel.org/stable/c/702c1ae0d31b44828ec3c87079def490c1ee1fb3"
},
{
"url": "https://git.kernel.org/stable/c/15d7a35a489287109b5a7c157d53d9b8214f0318"
},
{
"url": "https://git.kernel.org/stable/c/d21da6cc91ba1c4f1ae5ba007f3cb89e1c0c7549"
},
{
"url": "https://git.kernel.org/stable/c/afdee49a1b88ed9bb44e2b30e855297c169bcc53"
}
],
"title": "nvme-fabrics: fix DHCHAP secret leak on parse failure",
"x_generator": {
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}
}
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"cveMetadata": {
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"cveId": "CVE-2026-89975",
"datePublished": "2026-09-16T10:32:53.836Z",
"dateReserved": "2026-09-11T19:38:34.779Z",
"dateUpdated": "2026-10-30T12:33:39.796Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
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"cve": "CVE-2026-89975",
"date": "2026-11-09",
"epss": "0.00229",
"percentile": "0.13715"
},
"microsoft_vex": {
"current_release_date": "2026-11-07T01:51:00.000Z",
"cve": "CVE-2026-89975",
"id": "msrc_CVE-2026-89975",
"initial_release_date": "2026-09-17T01:13:37.000Z",
"product_status:fixed": "1",
"product_status:known_affected": "4",
"product_status:under_investigation": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "nvme-fabrics: fix DHCHAP secret leak on parse failure",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89975.json",
"version": "8"
},
"nvd": {
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"product": "Linux",
"programFiles": [
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],
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-fabrics: fix DHCHAP secret leak on parse failure\n\nnvmf_parse_options() duplicates dhchap_secret and dhchap_ctrl_secret\nwith match_strdup() before validating the DHHC-1: representation.\n\nIf validation fails, the parser returns -EINVAL before the temporary\nstring in p is assigned to opts-\u003edhchap_secret or\nopts-\u003edhchap_ctrl_secret. nvmf_create_ctrl() subsequently frees opts,\nbut nvmf_free_options() cannot release the unassigned temporary string.\nEach rejected option therefore leaks one allocation.\n\nThis is easy to miss because valid secrets transfer ownership to opts\nand are freed normally, while the malformed-secret path still returns\nthe expected -EINVAL to userspace.\n\nWith CONFIG_NVME_HOST_AUTH enabled, the leak is reachable before the\nrequired-option checks and transport lookup. No NVMe-oF target or\nworking transport connection is required; for example, repeatedly\nwriting\n\n\tdhchap_secret=BAD\n\nor\n\n\tdhchap_ctrl_secret=BAD\n\nto /dev/nvme-fabrics deterministically takes the leaking parse path.\n\nFree the temporary string before leaving both validation error paths.\nUse kfree_sensitive() because the copied option may contain secret\nmaterial even when its representation is rejected, matching the\nsensitive cleanup used for stored DHCHAP secrets."
}
],
"id": "CVE-2026-89975",
"lastModified": "2026-10-30T13:20:37.560",
"metrics": {},
"published": "2026-09-16T11:17:08.337",
"references": [
{
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"url": "https://git.kernel.org/stable/c/15d7a35a489287109b5a7c157d53d9b8214f0318"
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-11-07T11:27:05+00:00",
"cve": "CVE-2026-89975",
"id": "CVE-2026-89975",
"initial_release_date": "2026-09-16T00:00:00+00:00",
"product_status:known_affected": "112",
"product_status:known_not_affected": "91",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: nvme-fabrics: fix DHCHAP secret leak on parse failure",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89975.json",
"version": "3"
}
}
}
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|---|
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