{"api_version":"1","generated_at":"2026-09-13T13:03:49+00:00","cve":"CVE-2026-89527","urls":{"html":"https://cve.report/CVE-2026-89527","api":"https://cve.report/api/cve/CVE-2026-89527.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89527","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89527"},"summary":{"title":"svcrdma: Use svc_xprt_put to free listener on create failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsvcrdma: Use svc_xprt_put to free listener on create failure\n\nsvc_rdma_create() calls kfree(cma_xprt) when\nsvc_rdma_create_listen_id() fails. svc_xprt_init() has already\nacquired a net namespace reference via get_net_track(); kfree\nbypasses svc_xprt_free() which releases it.\n\nReplace the kfree() with svc_xprt_put() so the kref_init birth\nreference drops to zero and svc_xprt_free() dispatches\nsvc_rdma_free() to clean up properly. sc_cm_id is still NULL\nat that point; the preceding patch added the necessary NULL\nguard in svc_rdma_free().\n\nsvc_xprt_free() also drops the module reference via\nmodule_put(), but the caller _svc_xprt_create() does the same\non xpo_create failure, double-putting the single\ntry_module_get() it acquired. Take a compensating\n__module_get() before the svc_xprt_put() to keep the count\nbalanced, matching the convention in svc_rdma_accept()'s error\npath.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:19:35","updated_at":"2026-09-11 20:19:35"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/e346ef7bcb137f50c49f969330ab7dcf64ea1654","name":"https://git.kernel.org/stable/c/e346ef7bcb137f50c49f969330ab7dcf64ea1654","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ac1dd6002f758ab7dd3e737757e5a1bb1c0b38d6","name":"https://git.kernel.org/stable/c/ac1dd6002f758ab7dd3e737757e5a1bb1c0b38d6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89527","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89527","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4fb8518bdac8e85f6580ea3f586adf396cd472bc ac1dd6002f758ab7dd3e737757e5a1bb1c0b38d6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4fb8518bdac8e85f6580ea3f586adf396cd472bc e346ef7bcb137f50c49f969330ab7dcf64ea1654 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.37","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.37 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"89527","cve":"CVE-2026-89527","epss":"0.002010000","percentile":"0.101070000","score_date":"2026-09-12","updated_at":"2026-09-13 00:08:17"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/sunrpc/xprtrdma/svc_rdma_transport.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ac1dd6002f758ab7dd3e737757e5a1bb1c0b38d6","status":"affected","version":"4fb8518bdac8e85f6580ea3f586adf396cd472bc","versionType":"git"},{"lessThan":"e346ef7bcb137f50c49f969330ab7dcf64ea1654","status":"affected","version":"4fb8518bdac8e85f6580ea3f586adf396cd472bc","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/sunrpc/xprtrdma/svc_rdma_transport.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.37"},{"lessThan":"2.6.37","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"2.6.37","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"2.6.37","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsvcrdma: Use svc_xprt_put to free listener on create failure\n\nsvc_rdma_create() calls kfree(cma_xprt) when\nsvc_rdma_create_listen_id() fails. svc_xprt_init() has already\nacquired a net namespace reference via get_net_track(); kfree\nbypasses svc_xprt_free() which releases it.\n\nReplace the kfree() with svc_xprt_put() so the kref_init birth\nreference drops to zero and svc_xprt_free() dispatches\nsvc_rdma_free() to clean up properly. sc_cm_id is still NULL\nat that point; the preceding patch added the necessary NULL\nguard in svc_rdma_free().\n\nsvc_xprt_free() also drops the module reference via\nmodule_put(), but the caller _svc_xprt_create() does the same\non xpo_create failure, double-putting the single\ntry_module_get() it acquired. Take a compensating\n__module_get() before the svc_xprt_put() to keep the count\nbalanced, matching the convention in svc_rdma_accept()'s error\npath."}],"providerMetadata":{"dateUpdated":"2026-09-11T19:44:07.785Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ac1dd6002f758ab7dd3e737757e5a1bb1c0b38d6"},{"url":"https://git.kernel.org/stable/c/e346ef7bcb137f50c49f969330ab7dcf64ea1654"}],"title":"svcrdma: Use svc_xprt_put to free listener on create failure","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89527","datePublished":"2026-09-11T19:44:07.785Z","dateReserved":"2026-09-11T19:38:34.719Z","dateUpdated":"2026-09-11T19:44:07.785Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:19:35","lastModifiedDate":"2026-09-11 20:19:35","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89527","Ordinal":"1","Title":"svcrdma: Use svc_xprt_put to free listener on create failure","CVE":"CVE-2026-89527","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89527","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nsvcrdma: Use svc_xprt_put to free listener on create failure\n\nsvc_rdma_create() calls kfree(cma_xprt) when\nsvc_rdma_create_listen_id() fails. svc_xprt_init() has already\nacquired a net namespace reference via get_net_track(); kfree\nbypasses svc_xprt_free() which releases it.\n\nReplace the kfree() with svc_xprt_put() so the kref_init birth\nreference drops to zero and svc_xprt_free() dispatches\nsvc_rdma_free() to clean up properly. sc_cm_id is still NULL\nat that point; the preceding patch added the necessary NULL\nguard in svc_rdma_free().\n\nsvc_xprt_free() also drops the module reference via\nmodule_put(), but the caller _svc_xprt_create() does the same\non xpo_create failure, double-putting the single\ntry_module_get() it acquired. Take a compensating\n__module_get() before the svc_xprt_put() to keep the count\nbalanced, matching the convention in svc_rdma_accept()'s error\npath.","Type":"Description","Title":"svcrdma: Use svc_xprt_put to free listener on create failure"}]}}}