{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  net/smc: free stashed qentry before overwrite in REQ_ADD_LINK to ADD_LINK transition  When smc_llc_event_handler() transitions the local LLC flow from SMC_LLC_FLOW_REQ_ADD_LINK to SMC_LLC_FLOW_ADD_LINK on arrival of an ADD_LINK request, it calls smc_llc_flow_qentry_set() unconditionally:  \tif (lgr-\u003ellc_flow_lcl.type == SMC_LLC_FLOW_REQ_ADD_LINK) { \t\tlgr-\u003ellc_flow_lcl.type = SMC_LLC_FLOW_ADD_LINK; \t\tsmc_llc_flow_qentry_set(\u0026lgr-\u003ellc_flow_lcl, qentry); \t\t... \t}  A CONFIRM_LINK or ADD_LINK_CONT arriving while flow-\u003etype is SMC_LLC_FLOW_REQ_ADD_LINK is stashed into flow-\u003eqentry via the SMC_LLC_CONFIRM_LINK / SMC_LLC_ADD_LINK_CONT handler (which stores into flow-\u003eqentry for any non-NONE flow type).  When the subsequent ADD_LINK arrives, the REQ_ADD_LINK branch overwrites flow-\u003eqentry with the new pointer without first freeing the stashed allocation, leaking one kmalloc object.  The stashed entry has no consumer: smc_llc_wait() is only called from llc_add_link_work, which is not yet scheduled while the flow type remains REQ_ADD_LINK.  No waiter is sleeping on llc_msg_waiter at this point. It is safe to unconditionally free any stashed qentry before the overwrite.  Call smc_llc_flow_qentry_del() before smc_llc_flow_qentry_set() in the REQ_ADD_LINK branch.  smc_llc_flow_qentry_del() already checks flow-\u003eqentry before freeing, so the normal path where no entry is stashed is a no-op.",
  "id": "DEBIAN-CVE-2026-90108",
  "modified": "2026-09-18T04:47:33.197513635Z",
  "published": "2026-09-17T17:17:02.730Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-90108"
    }
  ],
  "upstream": [
    "CVE-2026-90108"
  ]
}