{"id":"CVE-2026-90415","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: free STAG index when TPT entry write fails\n\nwrite_tpt_entry() allocates a new STAG index with c4iw_get_resource() and\nbumps stats.stag.cur before programmin…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: free STAG index when TPT entry write fails\n\nwrite_tpt_entry() allocates a new STAG index with c4iw_get_resource() and\nbumps stats.stag.cur before programmin…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= ec3eead217181d7360a11317a888ceb30807867c < 5fe4731bfbd8d83c4a14b4af3a27329969ce8a99","Linux >= ec3eead217181d7360a11317a888ceb30807867c < 8f6976d635d190e3d7af7103daaa581cf1ccc12e","Linux >= ec3eead217181d7360a11317a888ceb30807867c < 9eeafcda1d6c11f0eec532243c4e96ec8c632bd7","Linux >= ec3eead217181d7360a11317a888ceb30807867c < 5a21e5114cec4cd3f8a2843d4c46bc49634d6e96","Linux >= ec3eead217181d7360a11317a888ceb30807867c < 2f17ca7ab5269ac2504e1039c3921373dccd7712","Linux >= ec3eead217181d7360a11317a888ceb30807867c < a2e37d1ab773be3cd26b1c19593ca2dbcece9c57","Linux >= ec3eead217181d7360a11317a888ceb30807867c < a64e2beb450179a5d43034af8d5476a11eac1486","Linux >= ec3eead217181d7360a11317a888ceb30807867c < fdfb5cea4bf070cdb31d997efd87bb684df041fd","Linux 3.5"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:45.647","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90415","references":[{"url":"https://git.kernel.org/stable/c/2f17ca7ab5269ac2504e1039c3921373dccd7712","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5a21e5114cec4cd3f8a2843d4c46bc49634d6e96","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5fe4731bfbd8d83c4a14b4af3a27329969ce8a99","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8f6976d635d190e3d7af7103daaa581cf1ccc12e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9eeafcda1d6c11f0eec532243c4e96ec8c632bd7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a2e37d1ab773be3cd26b1c19593ca2dbcece9c57","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a64e2beb450179a5d43034af8d5476a11eac1486","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fdfb5cea4bf070cdb31d997efd87bb684df041fd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90415.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-90415"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536631"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90415"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90415"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90415.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-17T16:21:47.796Z","epss":0.00177,"epssPercentile":0.0716,"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-2026-90415","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: free STAG index when TPT entry write fails\n\nwrite_tpt_entry() allocates a new STAG index with c4iw_get_resource() and\nbumps stats.stag.cur before programming the entry.  When\nwrite_adapter_mem() fails, it returns the error without releasing the index\nor reversing the statistic.  No MR is inserted into rhp->mrs, so\nderegistration never reclaims it, leaking the index until device teardown.\n\nRecord whether this call allocated the index and, on a failed write, return\nit to tpt_table and decrement stats.stag.cur.  Key the rollback on both the\nwrite error and that flag, not the error alone: a non-reset update carries\na caller-owned STAG that this call did not allocate and must not free.\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 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-05 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90415.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":216308,"id":"CVE-2026-90415","ts":1791274070064,"field":"cvss","old":null,"new":"5.5"},{"seq":216307,"id":"CVE-2026-90415","ts":1791274070064,"field":"severity","old":"none","new":"medium"}]}