{"id":"CVE-2026-90107","title":"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\tm…","summary":"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\tm…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 555da9af827d95134656fa459c8f3ece04dd867a < 8e3deb150a5237b672c4579e69a6deb02027dbed","Linux >= 555da9af827d95134656fa459c8f3ece04dd867a < 11bc373ee6630709f0c2da2e7860c23d503c9e9d","Linux >= 555da9af827d95134656fa459c8f3ece04dd867a < 032aec7d03c9102616b98fea74f8f7145e7f867c","Linux >= 555da9af827d95134656fa459c8f3ece04dd867a < 957dba2b8b5aebfe09caa6a6b22b958079082eab","Linux >= 555da9af827d95134656fa459c8f3ece04dd867a < f03aa5d36ae3c4068a1c3885146be99aa7fd9307","Linux >= 555da9af827d95134656fa459c8f3ece04dd867a < 0879ea157acc1ac6752f6fcb755d1f91a2359238","Linux >= 555da9af827d95134656fa459c8f3ece04dd867a < 5ff429dd6725fa6c1e17a4ed0be8ab675f67a98b","Linux >= 555da9af827d95134656fa459c8f3ece04dd867a < 5ee0ceddc7785c6dcf4a8107fef01f0414a354f4","Linux 5.8"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:02.570","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90107","references":[{"url":"https://git.kernel.org/stable/c/032aec7d03c9102616b98fea74f8f7145e7f867c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/0879ea157acc1ac6752f6fcb755d1f91a2359238","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/11bc373ee6630709f0c2da2e7860c23d503c9e9d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5ee0ceddc7785c6dcf4a8107fef01f0414a354f4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5ff429dd6725fa6c1e17a4ed0be8ab675f67a98b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8e3deb150a5237b672c4579e69a6deb02027dbed","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/957dba2b8b5aebfe09caa6a6b22b958079082eab","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f03aa5d36ae3c4068a1c3885146be99aa7fd9307","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.888Z","epss":0.00211,"epssPercentile":0.11599,"slug":"CVE-2026-90107","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}