{"api_version":"1","generated_at":"2026-08-16T17:36:55+00:00","cve":"CVE-2026-72469","urls":{"html":"https://cve.report/CVE-2026-72469","api":"https://cve.report/api/cve/CVE-2026-72469.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-72469","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-72469"},"summary":{"title":"xprtrdma: Fix ep kref imbalance on ADDR_CHANGE","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxprtrdma: Fix ep kref imbalance on ADDR_CHANGE\n\nrpcrdma_cm_event_handler() falls through to the disconnected: label\non RDMA_CM_EVENT_ADDR_CHANGE and calls rpcrdma_ep_put() with no\nmatching get when the event arrives before RDMA_CM_EVENT_ESTABLISHED.\nThe kref then underflows during connect teardown and\nrpcrdma_xprt_disconnect() operates on a freed ep.\n\nReference counts across a normal connection lifecycle:\n\n    rpcrdma_ep_create()             kref_init     ->1\n    rpcrdma_xprt_connect()          ep_get        ->2  (before post_recvs)\n    RDMA_CM_EVENT_ESTABLISHED       ep_get        ->3\n    RDMA_CM_EVENT_DISCONNECTED      ep_put        ->2\n    rpcrdma_xprt_drain()            ep_put        ->1\n    rpcrdma_xprt_disconnect() tail  ep_put        ->0  (ep_destroy)\n\nThe connect-time get in rpcrdma_xprt_connect(), taken just before\nrpcrdma_post_recvs() \"while there are outstanding Receives,\" is\nbalanced by rpcrdma_xprt_drain. ADDR_CHANGE before ESTABLISHED has\nno get to consume, so its put drops the count to 1 and the drain\nput then frees the ep while rpcrdma_xprt_disconnect() still holds a\npointer to it.\n\nFix by dispatching on the prior re_connect_status via xchg(): for\nprev == 0 (pre-ESTABLISHED) wake the connect waiter and return with\nno put; for prev == 1 call rpcrdma_force_disconnect() and return.\nThe case-1 arm relies on the subsequent RDMA_CM_EVENT_DISCONNECTED\nevent -- reliably delivered when rdma_disconnect() is called on a\nstill-connected cm_id -- to balance the ESTABLISHED get;\nrpcrdma_xprt_drain() continues to balance only that connect-time\nget. Any other prior value means teardown is already in flight.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:20","updated_at":"2026-08-15 06:22:20"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/cfd1bab66b042da7a778786685125656c695931b","name":"https://git.kernel.org/stable/c/cfd1bab66b042da7a778786685125656c695931b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/af9b65b29af341932625c4283dc7a23cdb62688a","name":"https://git.kernel.org/stable/c/af9b65b29af341932625c4283dc7a23cdb62688a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ffc07790539736a5d029f6a3c966b46c529f93a8","name":"https://git.kernel.org/stable/c/ffc07790539736a5d029f6a3c966b46c529f93a8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d0479c2b12974aa188b10d221a5770126b118b6d","name":"https://git.kernel.org/stable/c/d0479c2b12974aa188b10d221a5770126b118b6d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-72469","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72469","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2acc5cae292355f5f18ad377a2a966e7f03c8fec cfd1bab66b042da7a778786685125656c695931b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2acc5cae292355f5f18ad377a2a966e7f03c8fec d0479c2b12974aa188b10d221a5770126b118b6d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2acc5cae292355f5f18ad377a2a966e7f03c8fec ffc07790539736a5d029f6a3c966b46c529f93a8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2acc5cae292355f5f18ad377a2a966e7f03c8fec af9b65b29af341932625c4283dc7a23cdb62688a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2fcbf07a4f23174a45e015b62a8e42ddbc2e53ef git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.7.9 5.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"72469","cve":"CVE-2026-72469","epss":"0.002090000","percentile":"0.113110000","score_date":"2026-08-15","updated_at":"2026-08-16 00:00:31"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/sunrpc/xprtrdma/verbs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"cfd1bab66b042da7a778786685125656c695931b","status":"affected","version":"2acc5cae292355f5f18ad377a2a966e7f03c8fec","versionType":"git"},{"lessThan":"d0479c2b12974aa188b10d221a5770126b118b6d","status":"affected","version":"2acc5cae292355f5f18ad377a2a966e7f03c8fec","versionType":"git"},{"lessThan":"ffc07790539736a5d029f6a3c966b46c529f93a8","status":"affected","version":"2acc5cae292355f5f18ad377a2a966e7f03c8fec","versionType":"git"},{"lessThan":"af9b65b29af341932625c4283dc7a23cdb62688a","status":"affected","version":"2acc5cae292355f5f18ad377a2a966e7f03c8fec","versionType":"git"},{"status":"affected","version":"2fcbf07a4f23174a45e015b62a8e42ddbc2e53ef","versionType":"git"},{"lessThan":"5.8","status":"affected","version":"5.7.9","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/sunrpc/xprtrdma/verbs.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.8"},{"lessThan":"5.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"5.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"5.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"5.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"5.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7.9","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxprtrdma: Fix ep kref imbalance on ADDR_CHANGE\n\nrpcrdma_cm_event_handler() falls through to the disconnected: label\non RDMA_CM_EVENT_ADDR_CHANGE and calls rpcrdma_ep_put() with no\nmatching get when the event arrives before RDMA_CM_EVENT_ESTABLISHED.\nThe kref then underflows during connect teardown and\nrpcrdma_xprt_disconnect() operates on a freed ep.\n\nReference counts across a normal connection lifecycle:\n\n    rpcrdma_ep_create()             kref_init     ->1\n    rpcrdma_xprt_connect()          ep_get        ->2  (before post_recvs)\n    RDMA_CM_EVENT_ESTABLISHED       ep_get        ->3\n    RDMA_CM_EVENT_DISCONNECTED      ep_put        ->2\n    rpcrdma_xprt_drain()            ep_put        ->1\n    rpcrdma_xprt_disconnect() tail  ep_put        ->0  (ep_destroy)\n\nThe connect-time get in rpcrdma_xprt_connect(), taken just before\nrpcrdma_post_recvs() \"while there are outstanding Receives,\" is\nbalanced by rpcrdma_xprt_drain. ADDR_CHANGE before ESTABLISHED has\nno get to consume, so its put drops the count to 1 and the drain\nput then frees the ep while rpcrdma_xprt_disconnect() still holds a\npointer to it.\n\nFix by dispatching on the prior re_connect_status via xchg(): for\nprev == 0 (pre-ESTABLISHED) wake the connect waiter and return with\nno put; for prev == 1 call rpcrdma_force_disconnect() and return.\nThe case-1 arm relies on the subsequent RDMA_CM_EVENT_DISCONNECTED\nevent -- reliably delivered when rdma_disconnect() is called on a\nstill-connected cm_id -- to balance the ESTABLISHED get;\nrpcrdma_xprt_drain() continues to balance only that connect-time\nget. Any other prior value means teardown is already in flight."}],"providerMetadata":{"dateUpdated":"2026-08-15T05:57:11.829Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/cfd1bab66b042da7a778786685125656c695931b"},{"url":"https://git.kernel.org/stable/c/d0479c2b12974aa188b10d221a5770126b118b6d"},{"url":"https://git.kernel.org/stable/c/ffc07790539736a5d029f6a3c966b46c529f93a8"},{"url":"https://git.kernel.org/stable/c/af9b65b29af341932625c4283dc7a23cdb62688a"}],"title":"xprtrdma: Fix ep kref imbalance on ADDR_CHANGE","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-72469","datePublished":"2026-08-15T05:57:11.829Z","dateReserved":"2026-08-09T03:40:39.934Z","dateUpdated":"2026-08-15T05:57:11.829Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:20","lastModifiedDate":"2026-08-15 06:22:20","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"72469","Ordinal":"1","Title":"xprtrdma: Fix ep kref imbalance on ADDR_CHANGE","CVE":"CVE-2026-72469","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"72469","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nxprtrdma: Fix ep kref imbalance on ADDR_CHANGE\n\nrpcrdma_cm_event_handler() falls through to the disconnected: label\non RDMA_CM_EVENT_ADDR_CHANGE and calls rpcrdma_ep_put() with no\nmatching get when the event arrives before RDMA_CM_EVENT_ESTABLISHED.\nThe kref then underflows during connect teardown and\nrpcrdma_xprt_disconnect() operates on a freed ep.\n\nReference counts across a normal connection lifecycle:\n\n    rpcrdma_ep_create()             kref_init     ->1\n    rpcrdma_xprt_connect()          ep_get        ->2  (before post_recvs)\n    RDMA_CM_EVENT_ESTABLISHED       ep_get        ->3\n    RDMA_CM_EVENT_DISCONNECTED      ep_put        ->2\n    rpcrdma_xprt_drain()            ep_put        ->1\n    rpcrdma_xprt_disconnect() tail  ep_put        ->0  (ep_destroy)\n\nThe connect-time get in rpcrdma_xprt_connect(), taken just before\nrpcrdma_post_recvs() \"while there are outstanding Receives,\" is\nbalanced by rpcrdma_xprt_drain. ADDR_CHANGE before ESTABLISHED has\nno get to consume, so its put drops the count to 1 and the drain\nput then frees the ep while rpcrdma_xprt_disconnect() still holds a\npointer to it.\n\nFix by dispatching on the prior re_connect_status via xchg(): for\nprev == 0 (pre-ESTABLISHED) wake the connect waiter and return with\nno put; for prev == 1 call rpcrdma_force_disconnect() and return.\nThe case-1 arm relies on the subsequent RDMA_CM_EVENT_DISCONNECTED\nevent -- reliably delivered when rdma_disconnect() is called on a\nstill-connected cm_id -- to balance the ESTABLISHED get;\nrpcrdma_xprt_drain() continues to balance only that connect-time\nget. Any other prior value means teardown is already in flight.","Type":"Description","Title":"xprtrdma: Fix ep kref imbalance on ADDR_CHANGE"}]}}}