{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "9014db202cb764b8e14c53e7bacc81f9a1a2ba7f"
            },
            {
              "fixed": "6a644a7340df978785f3109d1e0726a982ce2c6f"
            },
            {
              "fixed": "0761e49aa78c2f1362511054c6e9670653858837"
            },
            {
              "fixed": "0926f59ca0f94120895b92180c636a48d0ed3a6d"
            },
            {
              "fixed": "c924884743e948e25625b7fbf3ee2a9325a204a7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.18.0"
            },
            {
              "fixed": "6.12.109"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80982.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix use-after-free in smc_rx_pipe_buf_release()\n\nsmc_rx_splice() hands RMB pages to a pipe and takes a socket reference\nper entry so the smc_sock stays alive until the reader finishes. The\nconnection does not: a concurrent close runs smc_conn_free(), which\nreleases the receive buffer back to the link group pool.\n\nsmc_rx_pipe_buf_release() tests sk_state before taking the socket lock.\nThe state can change between the test and the lock, and\nsmc_rx_update_cons() then dereferences conn-\u003ermb_desc and walks\nconn-\u003elgr, which smc_conn_free() has already released. On the\nis_reg_err path smcr_buf_unuse() frees the descriptor outright, so\nthis is a use-after-free.\n\nTake the socket lock first and test conn-\u003efreed instead.\nsmc_conn_free() sets that flag before releasing anything, and every\ncaller holds the socket lock. The two paths exclude each other: either\nthe pipe release runs first with everything valid, or it sees the flag\nand skips the update.",
  "id": "CVE-2026-80982",
  "modified": "2026-09-13T03:30:41.632191797Z",
  "published": "2026-09-11T19:42:42.243Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0761e49aa78c2f1362511054c6e9670653858837"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0926f59ca0f94120895b92180c636a48d0ed3a6d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6a644a7340df978785f3109d1e0726a982ce2c6f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c924884743e948e25625b7fbf3ee2a9325a204a7"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80982.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80982"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net/smc: fix use-after-free in smc_rx_pipe_buf_release()"
}