{"api_version":"1","generated_at":"2026-11-07T18:11:50+00:00","cve":"CVE-2026-90108","urls":{"html":"https://cve.report/CVE-2026-90108","api":"https://cve.report/api/cve/CVE-2026-90108.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90108","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90108"},"summary":{"title":"net/smc: free stashed qentry before overwrite in REQ_ADD_LINK to ADD_LINK transition","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: free stashed qentry before overwrite in REQ_ADD_LINK to ADD_LINK transition\n\nWhen smc_llc_event_handler() transitions the local LLC flow from\nSMC_LLC_FLOW_REQ_ADD_LINK to SMC_LLC_FLOW_ADD_LINK on arrival of an ADD_LINK\nrequest, it calls smc_llc_flow_qentry_set() unconditionally:\n\n\tif (lgr->llc_flow_lcl.type == SMC_LLC_FLOW_REQ_ADD_LINK) {\n\t\tlgr->llc_flow_lcl.type = SMC_LLC_FLOW_ADD_LINK;\n\t\tsmc_llc_flow_qentry_set(&lgr->llc_flow_lcl, qentry);\n\t\t...\n\t}\n\nA CONFIRM_LINK or ADD_LINK_CONT arriving while flow->type is\nSMC_LLC_FLOW_REQ_ADD_LINK is stashed into flow->qentry via the\nSMC_LLC_CONFIRM_LINK / SMC_LLC_ADD_LINK_CONT handler (which stores into\nflow->qentry for any non-NONE flow type).  When the subsequent ADD_LINK\narrives, the REQ_ADD_LINK branch overwrites flow->qentry with the new pointer\nwithout first freeing the stashed allocation, leaking one kmalloc object.\n\nThe stashed entry has no consumer: smc_llc_wait() is only called from\nllc_add_link_work, which is not yet scheduled while the flow type remains\nREQ_ADD_LINK.  No waiter is sleeping on llc_msg_waiter at this point.\nIt is safe to unconditionally free any stashed qentry before\nthe overwrite.\n\nCall smc_llc_flow_qentry_del() before smc_llc_flow_qentry_set() in the\nREQ_ADD_LINK branch.  smc_llc_flow_qentry_del() already checks flow->qentry\nbefore freeing, so the normal path where no entry is stashed is a no-op.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:02","updated_at":"2026-10-19 09:19:00"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/b08aacfb226a840628151643b6a34eecf545d311","name":"https://git.kernel.org/stable/c/b08aacfb226a840628151643b6a34eecf545d311","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/036322025d6e440cb75fc6fecbba9a16b271a2ae","name":"https://git.kernel.org/stable/c/036322025d6e440cb75fc6fecbba9a16b271a2ae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7dd55348c0d9399a9448847819e9f3904ae507ad","name":"https://git.kernel.org/stable/c/7dd55348c0d9399a9448847819e9f3904ae507ad","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0fb9a513766071ea9d5f3bf988e39241b8e9ee3b","name":"https://git.kernel.org/stable/c/0fb9a513766071ea9d5f3bf988e39241b8e9ee3b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/056395acb7041b3a1f2baa08d89a1938a8b8776a","name":"https://git.kernel.org/stable/c/056395acb7041b3a1f2baa08d89a1938a8b8776a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e25a602c45c76a7130878db72bcf6f76df04bf85","name":"https://git.kernel.org/stable/c/e25a602c45c76a7130878db72bcf6f76df04bf85","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90108","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90108","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196 7dd55348c0d9399a9448847819e9f3904ae507ad git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196 056395acb7041b3a1f2baa08d89a1938a8b8776a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196 b08aacfb226a840628151643b6a34eecf545d311 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196 0fb9a513766071ea9d5f3bf988e39241b8e9ee3b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196 e25a602c45c76a7130878db72bcf6f76df04bf85 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196 036322025d6e440cb75fc6fecbba9a16b271a2ae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.16","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/smc/smc_llc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"7dd55348c0d9399a9448847819e9f3904ae507ad","status":"affected","version":"b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196","versionType":"git"},{"lessThan":"056395acb7041b3a1f2baa08d89a1938a8b8776a","status":"affected","version":"b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196","versionType":"git"},{"lessThan":"b08aacfb226a840628151643b6a34eecf545d311","status":"affected","version":"b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196","versionType":"git"},{"lessThan":"0fb9a513766071ea9d5f3bf988e39241b8e9ee3b","status":"affected","version":"b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196","versionType":"git"},{"lessThan":"e25a602c45c76a7130878db72bcf6f76df04bf85","status":"affected","version":"b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196","versionType":"git"},{"lessThan":"036322025d6e440cb75fc6fecbba9a16b271a2ae","status":"affected","version":"b4ba4652b3f8b7c9bbb5786f8acf4724bdab2196","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/smc/smc_llc.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.16"},{"lessThan":"5.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"5.16","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: free stashed qentry before overwrite in REQ_ADD_LINK to ADD_LINK transition\n\nWhen smc_llc_event_handler() transitions the local LLC flow from\nSMC_LLC_FLOW_REQ_ADD_LINK to SMC_LLC_FLOW_ADD_LINK on arrival of an ADD_LINK\nrequest, it calls smc_llc_flow_qentry_set() unconditionally:\n\n\tif (lgr->llc_flow_lcl.type == SMC_LLC_FLOW_REQ_ADD_LINK) {\n\t\tlgr->llc_flow_lcl.type = SMC_LLC_FLOW_ADD_LINK;\n\t\tsmc_llc_flow_qentry_set(&lgr->llc_flow_lcl, qentry);\n\t\t...\n\t}\n\nA CONFIRM_LINK or ADD_LINK_CONT arriving while flow->type is\nSMC_LLC_FLOW_REQ_ADD_LINK is stashed into flow->qentry via the\nSMC_LLC_CONFIRM_LINK / SMC_LLC_ADD_LINK_CONT handler (which stores into\nflow->qentry for any non-NONE flow type).  When the subsequent ADD_LINK\narrives, the REQ_ADD_LINK branch overwrites flow->qentry with the new pointer\nwithout first freeing the stashed allocation, leaking one kmalloc object.\n\nThe stashed entry has no consumer: smc_llc_wait() is only called from\nllc_add_link_work, which is not yet scheduled while the flow type remains\nREQ_ADD_LINK.  No waiter is sleeping on llc_msg_waiter at this point.\nIt is safe to unconditionally free any stashed qentry before\nthe overwrite.\n\nCall smc_llc_flow_qentry_del() before smc_llc_flow_qentry_set() in the\nREQ_ADD_LINK branch.  smc_llc_flow_qentry_del() already checks flow->qentry\nbefore freeing, so the normal path where no entry is stashed is a no-op."}],"providerMetadata":{"dateUpdated":"2026-10-19T08:58:06.785Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/7dd55348c0d9399a9448847819e9f3904ae507ad"},{"url":"https://git.kernel.org/stable/c/056395acb7041b3a1f2baa08d89a1938a8b8776a"},{"url":"https://git.kernel.org/stable/c/b08aacfb226a840628151643b6a34eecf545d311"},{"url":"https://git.kernel.org/stable/c/0fb9a513766071ea9d5f3bf988e39241b8e9ee3b"},{"url":"https://git.kernel.org/stable/c/e25a602c45c76a7130878db72bcf6f76df04bf85"},{"url":"https://git.kernel.org/stable/c/036322025d6e440cb75fc6fecbba9a16b271a2ae"}],"title":"net/smc: free stashed qentry before overwrite in REQ_ADD_LINK to ADD_LINK transition","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90108","datePublished":"2026-09-17T16:06:16.813Z","dateReserved":"2026-09-11T19:38:34.787Z","dateUpdated":"2026-10-19T08:58:06.785Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:02","lastModifiedDate":"2026-10-19 09:19:00","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90108","Ordinal":"1","Title":"net/smc: free stashed qentry before overwrite in REQ_ADD_LINK to","CVE":"CVE-2026-90108","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90108","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: free stashed qentry before overwrite in REQ_ADD_LINK to ADD_LINK transition\n\nWhen smc_llc_event_handler() transitions the local LLC flow from\nSMC_LLC_FLOW_REQ_ADD_LINK to SMC_LLC_FLOW_ADD_LINK on arrival of an ADD_LINK\nrequest, it calls smc_llc_flow_qentry_set() unconditionally:\n\n\tif (lgr->llc_flow_lcl.type == SMC_LLC_FLOW_REQ_ADD_LINK) {\n\t\tlgr->llc_flow_lcl.type = SMC_LLC_FLOW_ADD_LINK;\n\t\tsmc_llc_flow_qentry_set(&lgr->llc_flow_lcl, qentry);\n\t\t...\n\t}\n\nA CONFIRM_LINK or ADD_LINK_CONT arriving while flow->type is\nSMC_LLC_FLOW_REQ_ADD_LINK is stashed into flow->qentry via the\nSMC_LLC_CONFIRM_LINK / SMC_LLC_ADD_LINK_CONT handler (which stores into\nflow->qentry for any non-NONE flow type).  When the subsequent ADD_LINK\narrives, the REQ_ADD_LINK branch overwrites flow->qentry with the new pointer\nwithout first freeing the stashed allocation, leaking one kmalloc object.\n\nThe stashed entry has no consumer: smc_llc_wait() is only called from\nllc_add_link_work, which is not yet scheduled while the flow type remains\nREQ_ADD_LINK.  No waiter is sleeping on llc_msg_waiter at this point.\nIt is safe to unconditionally free any stashed qentry before\nthe overwrite.\n\nCall smc_llc_flow_qentry_del() before smc_llc_flow_qentry_set() in the\nREQ_ADD_LINK branch.  smc_llc_flow_qentry_del() already checks flow->qentry\nbefore freeing, so the normal path where no entry is stashed is a no-op.","Type":"Description","Title":"net/smc: free stashed qentry before overwrite in REQ_ADD_LINK to"}]}}}