{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "a8f424c1287cc79a06c21816658feea87dfcb83f"
            },
            {
              "fixed": "c7a83899203ed36696a2d35ddd03c0f522874a63"
            },
            {
              "fixed": "50e700ac0edce72dee5c3a9755865d9423696ac7"
            },
            {
              "fixed": "7fae097aa9a56c30febf539d72ef3773165d3aa3"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.14.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74325.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mt76: use kfree_rcu for offchannel link in mt76_put_vif_phy_link\n\nmt76_put_vif_phy_link() frees the offchannel mlink with plain kfree()\nafter rcu_assign_pointer(NULL). However, rcu_assign_pointer only prevents\nfuture RCU readers from obtaining the pointer -- it does not wait for\nexisting readers that already hold it via rcu_dereference.\n\nThe TX datapath (e.g. mt7996_mac_write_txwi) dereferences mlink-\u003ewcid\nand mlink-\u003eidx under rcu_read_lock. If a TX softirq obtained the pointer\nvia rcu_dereference just before the NULL assignment, it will dereference\nfreed memory after the kfree.\n\nstruct mt76_vif_link already contains an rcu_head field that is unused at\nthis free site -- a developer oversight, since the adjacent\nkfree_rcu_mightsleep call for rx_sc in the same function shows the\npattern was understood.\n\nReplace kfree(mlink) with kfree_rcu(mlink, rcu_head).",
  "id": "CVE-2026-74325",
  "modified": "2026-08-16T03:31:04.717526492Z",
  "published": "2026-08-15T05:58:20.236Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50e700ac0edce72dee5c3a9755865d9423696ac7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7fae097aa9a56c30febf539d72ef3773165d3aa3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7a83899203ed36696a2d35ddd03c0f522874a63"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74325.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74325"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "wifi: mt76: use kfree_rcu for offchannel link in mt76_put_vif_phy_link"
}