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nvme-fabrics: fix DHCHAP secret leak on parse failure

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

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
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Prerequisites
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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
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