{"id":"CVE-2026-89535","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nsvcrdma: Reorder rpcrdma_rn_unregister before rdma_destroy_id\n\nsvc_rdma_free() caches rdma->sc_cm_id->device before teardown,\nthen calls rdma_destroy_id(sc_cm_id) which…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nsvcrdma: Reorder rpcrdma_rn_unregister before rdma_destroy_id\n\nsvc_rdma_free() caches rdma->sc_cm_id->device before teardown,\nthen calls rdma_destroy_id(sc_cm_id) which…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-825"],"vendor":"Linux","product":"Linux","affected":["Linux >= c4de97f7c45434985e5dbf2d6ccc9eca676e37fe < fcd4a752ac840d39356f4d2a424d3aca4e39716b","Linux >= c4de97f7c45434985e5dbf2d6ccc9eca676e37fe < 9f2f5d0999364c7070306cd422d8babc2621070d","Linux >= c4de97f7c45434985e5dbf2d6ccc9eca676e37fe < cfca6eb3345ba4a23cf9a1153ad09bf19faabfc9","Linux >= c4de97f7c45434985e5dbf2d6ccc9eca676e37fe < 4488e912973773d64368828acf3b8e39d93650ae","Linux 6.12"],"published":"2026-09-11","updated":"2026-09-21","sourceUpdated":"2026-09-21T14:17:22.700","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89535","references":[{"url":"https://git.kernel.org/stable/c/4488e912973773d64368828acf3b8e39d93650ae","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9f2f5d0999364c7070306cd422d8babc2621070d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cfca6eb3345ba4a23cf9a1153ad09bf19faabfc9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fcd4a752ac840d39356f4d2a424d3aca4e39716b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89535.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89535"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532438"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89535"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89535"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89535.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.0053,"epssPercentile":0.4373,"scores":{"nvd":8.1,"cna":8.1,"vendor":7},"ingestedAt":"2026-09-14T15:23:07.474Z","slug":"CVE-2026-89535","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nsvcrdma: Reorder rpcrdma_rn_unregister before rdma_destroy_id\n\nsvc_rdma_free() caches rdma->sc_cm_id->device before teardown,\nthen calls rdma_destroy_id(sc_cm_id) which frees the cm_id.\nrpcrdma_rn_unregister() follows, but between those two calls\nthe transport's sc_rn entry is still installed in the device's\nrd_xa. A concurrent ib_unregister_device walk can dispatch\nsvc_rdma_xprt_done() against the now-freed sc_cm_id.\n\nMove rpcrdma_rn_unregister() before rdma_destroy_id() so the\ntransport's notification entry is removed from the xarray before\nthe cm_id it references is destroyed.\n\nAlso guard the sc_cm_id dereference with a NULL check: the\nfollowing patches introduce paths that reach svc_rdma_free()\nwith sc_cm_id == NULL (listener create failure, ADDR_CHANGE\nreplacement failure).\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** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89535.json)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":208392,"id":"CVE-2026-89535","ts":1789997916349,"field":"cvss","old":"7","new":"8.1"},{"seq":203889,"id":"CVE-2026-89535","ts":1789490212398,"field":"cvss","old":"4.1","new":"7"},{"seq":203888,"id":"CVE-2026-89535","ts":1789490212398,"field":"severity","old":"medium","new":"high"},{"seq":203021,"id":"CVE-2026-89535","ts":1789403733379,"field":"cvss","old":"8.1","new":"4.1"},{"seq":203020,"id":"CVE-2026-89535","ts":1789403733379,"field":"severity","old":"high","new":"medium"},{"seq":197957,"id":"CVE-2026-89535","ts":1789384321138,"field":"cvss","old":"4.1","new":"8.1"},{"seq":197956,"id":"CVE-2026-89535","ts":1789384321138,"field":"severity","old":"medium","new":"high"},{"seq":183770,"id":"CVE-2026-89535","ts":1789356677312,"field":"cvss","old":"8.1","new":"4.1"},{"seq":183769,"id":"CVE-2026-89535","ts":1789356677312,"field":"severity","old":"high","new":"medium"},{"seq":153330,"id":"CVE-2026-89535","ts":1789285350073,"field":"cvss","old":null,"new":"8.1"},{"seq":153329,"id":"CVE-2026-89535","ts":1789285350073,"field":"severity","old":"none","new":"high"},{"seq":147227,"id":"CVE-2026-89535","ts":1789270202708,"field":"cvss","old":null,"new":"4.1"},{"seq":147226,"id":"CVE-2026-89535","ts":1789270202708,"field":"severity","old":"none","new":"medium"},{"seq":108982,"id":"CVE-2026-89535","ts":1789183729830,"field":"cvss","old":null,"new":"4.1"},{"seq":108981,"id":"CVE-2026-89535","ts":1789183729830,"field":"severity","old":"none","new":"medium"}]}