CVE-2026-89975nvme-fabrics: fix DHCHAP secret leak on parse failure
- —Not scoredno CVSS score yet
- 0.23%Exploitation in 30 daysEPSS · top 86% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 44 days later
· 44 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.23% · top 86% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected f50fff73d620cd6e8f48bc58d4f1c944615a3fea – < 35ec48228f6739339583e5a73ca315156372e30d
- affected f50fff73d620cd6e8f48bc58d4f1c944615a3fea – < 3ce0e9b43f355dfa0bdc0e0dd889795752285791
- affected f50fff73d620cd6e8f48bc58d4f1c944615a3fea – < 702c1ae0d31b44828ec3c87079def490c1ee1fb3
- affected f50fff73d620cd6e8f48bc58d4f1c944615a3fea – < 15d7a35a489287109b5a7c157d53d9b8214f0318
- affected f50fff73d620cd6e8f48bc58d4f1c944615a3fea – < d21da6cc91ba1c4f1ae5ba007f3cb89e1c0c7549
- affected f50fff73d620cd6e8f48bc58d4f1c944615a3fea – < afdee49a1b88ed9bb44e2b30e855297c169bcc53
- affected 6.0
- unaffected < 6.0
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.51 – ≤ 6.18.*
- unaffected 7.2.5 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/35ec48228f6739339583e5a73ca315156372e30d (opens in a new tab)
- https://git.kernel.org/stable/c/3ce0e9b43f355dfa0bdc0e0dd889795752285791 (opens in a new tab)
- https://git.kernel.org/stable/c/702c1ae0d31b44828ec3c87079def490c1ee1fb3 (opens in a new tab)
- https://git.kernel.org/stable/c/15d7a35a489287109b5a7c157d53d9b8214f0318 (opens in a new tab)
- https://git.kernel.org/stable/c/d21da6cc91ba1c4f1ae5ba007f3cb89e1c0c7549 (opens in a new tab)
- https://git.kernel.org/stable/c/afdee49a1b88ed9bb44e2b30e855297c169bcc53 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-80575 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-89975)Record last updated .