{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5e6808b4c68d7882971514ab3279926eb07c8b2d"
            },
            {
              "fixed": "0aa2dd6eaa347c7aab448df0eec0afcfe7489885"
            },
            {
              "fixed": "621c99be42e3f5cb68a6af9480a255218a761c4e"
            },
            {
              "fixed": "2df186418e17b30b319cf9ff81aad137692ab107"
            },
            {
              "fixed": "ef39fca8508597fa565cf2be72a884a712fb98af"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.5.0"
            },
            {
              "fixed": "6.12.111"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.53"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97966.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-pf: reset HTB scheduler topology before freeing queues\n\nHTB offload programs NIX_AF_TLxX_TOPOLOGY on QoS-allocated scheduler\nqueues via otx2_qos_txschq_set_parent_topology(), but teardown freed\nthose queues without clearing TOPOLOGY.  The AF only restores PARENT and\nSCHEDULE on free, so PRIO_ANCHOR/RR_PRIO settings can survive in the\nshared scheduler pool and affect later allocations.\n\nAdd otx2_qos_reset_schq_topology() and otx2_qos_free_hw_schq() to zero\nTL4 through TL2 TOPOLOGY before each schq is returned to the AF during\nhierarchy teardown and cfg rollback.  Skip the aggregation level (TL1):\nit is a per-tx-link queue shared by the PF, default Tx hierarchy and VFs,\nand is not freed back to the AF by nix_txschq_free_one().",
  "id": "CVE-2026-97966",
  "modified": "2026-09-26T03:30:39.470042792Z",
  "published": "2026-09-25T10:23:08.543Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0aa2dd6eaa347c7aab448df0eec0afcfe7489885"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2df186418e17b30b319cf9ff81aad137692ab107"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/621c99be42e3f5cb68a6af9480a255218a761c4e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ef39fca8508597fa565cf2be72a884a712fb98af"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97966.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97966"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "octeontx2-pf: reset HTB scheduler topology before freeing queues"
}