{"id":"CVE-2026-89975","title":"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 DH…","summary":"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 DH…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= f50fff73d620cd6e8f48bc58d4f1c944615a3fea < 702c1ae0d31b44828ec3c87079def490c1ee1fb3","Linux >= f50fff73d620cd6e8f48bc58d4f1c944615a3fea < 15d7a35a489287109b5a7c157d53d9b8214f0318","Linux >= f50fff73d620cd6e8f48bc58d4f1c944615a3fea < d21da6cc91ba1c4f1ae5ba007f3cb89e1c0c7549","Linux >= f50fff73d620cd6e8f48bc58d4f1c944615a3fea < afdee49a1b88ed9bb44e2b30e855297c169bcc53","Linux 6.0"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T11:17:08.337","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89975","references":[{"url":"https://git.kernel.org/stable/c/15d7a35a489287109b5a7c157d53d9b8214f0318","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/702c1ae0d31b44828ec3c87079def490c1ee1fb3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/afdee49a1b88ed9bb44e2b30e855297c169bcc53","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d21da6cc91ba1c4f1ae5ba007f3cb89e1c0c7549","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89975.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89975"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2535245"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89975"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89975"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89975.mbox"},{"url":"https://git.kernel.org/stable/c/3ce0e9b43f355dfa0bdc0e0dd889795752285791"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-16T10:53:53.955Z","epss":0.00208,"epssPercentile":0.10788,"cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-772"],"slug":"CVE-2026-89975","body":"## Overview\n\nIn 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->dhchap_secret or\nopts->dhchap_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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-05 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89975.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":216219,"id":"CVE-2026-89975","ts":1791274041255,"field":"cvss","old":null,"new":"5.5"},{"seq":216218,"id":"CVE-2026-89975","ts":1791274041255,"field":"severity","old":"none","new":"medium"}]}