{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "54493a08e21f46446b3b24577c5a6f229d049757"
            },
            {
              "fixed": "16ca0e79f31ea810346a79dda545ba344ede1d47"
            },
            {
              "fixed": "3a6e67ff267af2053a793825c3b7844741fed461"
            },
            {
              "fixed": "8117cbc504cb01980258d8a8c9be8f57cf0aaceb"
            },
            {
              "fixed": "04c824940d52871c49866a4ac67b504146f7cf35"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.18.0"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.56"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98807.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: Fix slab-out-of-bounds when handling team device events\n\nThe mlx5_handle_changeupper_event() and mlx5_handle_changeinfodata_event()\nfunctions check for LAG masters (which includes both bonding and team\ndevices) but only call bonding-specific APIs. When processing team device\nevents, calling bond_slave_get_rcu() and bond_is_slave_inactive() on\nteam_port structures causes KASAN to detect an out-of-bounds memory access\nsince team_port is smaller than bond slave.\n\nFix this by wrapping the bond-specific API calls with a check for bonding\ndevices. This allows the function to still process LAG events for both\nbonding and teams but only calls bond-specific functions when dealing with\nactual bonding devices.\n\nFor mlx5_handle_changeinfodata_event(), keep the explicit bond check as\nmlx5 doesn't handle state information for team ports anyway.\n\nTested with Mellanox ConnectX-5 on Linux 7.2.0-rc6:\n- Bonding: PASS (no regressions)\n- Team device: PASS (no KASAN errors)",
  "id": "CVE-2026-98807",
  "modified": "2026-10-20T02:30:32.922755102Z",
  "published": "2026-10-18T15:48:53.992Z",
  "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/04c824940d52871c49866a4ac67b504146f7cf35"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/16ca0e79f31ea810346a79dda545ba344ede1d47"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3a6e67ff267af2053a793825c3b7844741fed461"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8117cbc504cb01980258d8a8c9be8f57cf0aaceb"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98807.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98807"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net/mlx5: Fix slab-out-of-bounds when handling team device events"
}