nvme-fabrics: fix DHCHAP secret leak on parse failure
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.
CVE-2026-89975
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89975
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "f50fff73d620cd6e8f48bc58d4f1c944615a3fea",
"lessThan": "3ce0e9b43f355dfa0bdc0e0dd889795752285791",
"versionType": "git"
},
{
"status": "affected",
"version": "f50fff73d620cd6e8f48bc58d4f1c944615a3fea",
"lessThan": "702c1ae0d31b44828ec3c87079def490c1ee1fb3",
"versionType": "git"
},
{
"status": "affected",
"version": "f50fff73d620cd6e8f48bc58d4f1c944615a3fea",
"lessThan": "15d7a35a489287109b5a7c157d53d9b8214f0318",
"versionType": "git"
},
{
"status": "affected",
"version": "f50fff73d620cd6e8f48bc58d4f1c944615a3fea",
"lessThan": "d21da6cc91ba1c4f1ae5ba007f3cb89e1c0c7549",
"versionType": "git"
},
{
"status": "affected",
"version": "f50fff73d620cd6e8f48bc58d4f1c944615a3fea",
"lessThan": "afdee49a1b88ed9bb44e2b30e855297c169bcc53",
"versionType": "git"
}
],
"programFiles": [
"drivers/nvme/host/fabrics.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/nvme/host/fabrics.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89975
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48574 · Revision 1
- Added to Heist Feed
- Publisher date