{"cve":"CVE-2026-90107","nvd":{"published":"2026-09-17T17:17:02.570","modified":"2026-10-19T09:19:00.003","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: free pending qentry in smc_llc_flow_stop() before memset\n\nsmc_llc_flow_stop() resets a flow struct with a blind memset:\n\n\tspin_lock_bh(&lgr->llc_flow_lock);\n\tmemset(flow, 0, sizeof(*flow));\n\tflow->type = SMC_LLC_FLOW_NONE;\n\tspin_unlock_bh(&lgr->llc_flow_lock);\n\nIf flow->qentry is non-NULL at this point the pointer is overwritten without the\nallocation being freed, leaking one kmalloc object.\n\nA late-arriving duplicate CONFIRM_LINK or ADD_LINK_CONT message can set\nflow->qentry after the legitimate message has been consumed by the waiter via\nsmc_llc_flow_qentry_clr() (which NULLs the pointer but leaves flow->type\nnon-zero) but before the flow completes and smc_llc_flow_stop() runs.  In that\nwindow the duplicate is stashed into flow->qentry, and then lost when\nsmc_llc_flow_stop() zeros the struct.\n\nCall smc_llc_flow_qentry_del() inside the lock before the memset.\nsmc_llc_flow_qentry_del() already checks flow->qentry before freeing, so the\nnormal case where no entry is pending is a no-op.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/032aec7d03c9102616b98fea74f8f7145e7f867c","https://git.kernel.org/stable/c/0879ea157acc1ac6752f6fcb755d1f91a2359238","https://git.kernel.org/stable/c/11bc373ee6630709f0c2da2e7860c23d503c9e9d","https://git.kernel.org/stable/c/5ee0ceddc7785c6dcf4a8107fef01f0414a354f4","https://git.kernel.org/stable/c/5ff429dd6725fa6c1e17a4ed0be8ab675f67a98b"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:55:23.253742848+00:00"},"epss":{"cve":"CVE-2026-90107","score":0.00216,"percentile":0.11975,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}