{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f"
            },
            {
              "fixed": "da7e4a1aaf397af6a094f640c92d6bc7564c10db"
            },
            {
              "fixed": "95e414f8324385771bdfd6d497a01d5593813ccb"
            },
            {
              "fixed": "26a96fa81496afe7d162d172ccdc8cb9dbc685d2"
            },
            {
              "fixed": "da87896f34e0a51489811d1a684e2953099ca98f"
            },
            {
              "fixed": "0a9c520fdcb1cb2e79c163c12d359b5e1ee40007"
            },
            {
              "fixed": "17bfe0a8c014ee1d542ad352cd6a0a505361664a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.13.0"
            },
            {
              "fixed": "6.1.176"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.93"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.35"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63973.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Add NULL guards in teardown path to prevent panic on attach failure\n\nWhen queue allocation fails partway through, the error cleanup frees\nand NULLs apc-\u003etx_qp and apc-\u003erxqs. Multiple teardown paths such as\nmana_remove(), mana_change_mtu() recovery, and internal error handling\nin mana_alloc_queues() can subsequently call into functions that\ndereference these pointers without NULL checks:\n\n- mana_chn_setxdp() dereferences apc-\u003erxqs[0], causing a NULL pointer\n  dereference panic (CR2: 0000000000000000 at mana_chn_setxdp+0x26).\n- mana_destroy_vport() iterates apc-\u003erxqs without a NULL check.\n- mana_fence_rqs() iterates apc-\u003erxqs without a NULL check.\n- mana_dealloc_queues() iterates apc-\u003etx_qp without a NULL check.\n\nAdd NULL guards for apc-\u003erxqs in mana_fence_rqs(),\nmana_destroy_vport(), and before the mana_chn_setxdp() call. Add a\nNULL guard for apc-\u003etx_qp in mana_dealloc_queues() to skip TX queue\ndraining when TX queues were never allocated or already freed.",
  "id": "CVE-2026-63973",
  "modified": "2026-07-21T03:41:44.804862909Z",
  "published": "2026-07-19T14:55:59.263Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0a9c520fdcb1cb2e79c163c12d359b5e1ee40007"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/17bfe0a8c014ee1d542ad352cd6a0a505361664a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26a96fa81496afe7d162d172ccdc8cb9dbc685d2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95e414f8324385771bdfd6d497a01d5593813ccb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/da7e4a1aaf397af6a094f640c92d6bc7564c10db"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/da87896f34e0a51489811d1a684e2953099ca98f"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63973.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63973"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "net: mana: Add NULL guards in teardown path to prevent panic on attach failure"
}