{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "2a2cb4c6c18130e9f14d2e39deb75590744d98ef"
            },
            {
              "fixed": "cbda6197929418fabf0e45ecf9b7a76360944c70"
            },
            {
              "fixed": "bce9af1b030bf59d51bbabf909a3ef164787e44e"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "8910b1cef190545085e9bb486f35dd30ad928a05"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e8f897f4afef0031fe618a8e94127a0934896aba"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50042.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nice: Fix increasing MSI-X on VF\n\nIncreasing MSI-X value on a VF leads to invalid memory operations. This\nis caused by not reallocating some arrays.\n\nReproducer:\n  modprobe ice\n  echo 0 \u003e /sys/bus/pci/devices/$PF_PCI/sriov_drivers_autoprobe\n  echo 1 \u003e /sys/bus/pci/devices/$PF_PCI/sriov_numvfs\n  echo 17 \u003e /sys/bus/pci/devices/$VF0_PCI/sriov_vf_msix_count\n\nDefault MSI-X is 16, so 17 and above triggers this issue.\n\nKASAN reports:\n\n  BUG: KASAN: slab-out-of-bounds in ice_vsi_alloc_ring_stats+0x38d/0x4b0 [ice]\n  Read of size 8 at addr ffff8888b937d180 by task bash/28433\n  (...)\n\n  Call Trace:\n   (...)\n   ? ice_vsi_alloc_ring_stats+0x38d/0x4b0 [ice]\n   kasan_report+0xed/0x120\n   ? ice_vsi_alloc_ring_stats+0x38d/0x4b0 [ice]\n   ice_vsi_alloc_ring_stats+0x38d/0x4b0 [ice]\n   ice_vsi_cfg_def+0x3360/0x4770 [ice]\n   ? mutex_unlock+0x83/0xd0\n   ? __pfx_ice_vsi_cfg_def+0x10/0x10 [ice]\n   ? __pfx_ice_remove_vsi_lkup_fltr+0x10/0x10 [ice]\n   ice_vsi_cfg+0x7f/0x3b0 [ice]\n   ice_vf_reconfig_vsi+0x114/0x210 [ice]\n   ice_sriov_set_msix_vec_count+0x3d0/0x960 [ice]\n   sriov_vf_msix_count_store+0x21c/0x300\n   (...)\n\n  Allocated by task 28201:\n   (...)\n   ice_vsi_cfg_def+0x1c8e/0x4770 [ice]\n   ice_vsi_cfg+0x7f/0x3b0 [ice]\n   ice_vsi_setup+0x179/0xa30 [ice]\n   ice_sriov_configure+0xcaa/0x1520 [ice]\n   sriov_numvfs_store+0x212/0x390\n   (...)\n\nTo fix it, use ice_vsi_rebuild() instead of ice_vf_reconfig_vsi(). This\ncauses the required arrays to be reallocated taking the new queue count\ninto account (ice_vsi_realloc_stat_arrays()). Set req_txq and req_rxq\nbefore ice_vsi_rebuild(), so that realloc uses the newly set queue\ncount.\n\nAdditionally, ice_vsi_rebuild() does not remove VSI filters\n(ice_fltr_remove_all()), so ice_vf_init_host_cfg() is no longer\nnecessary.",
  "id": "CVE-2024-50042",
  "modified": "2026-02-22T06:34:53.447761956Z",
  "published": "2024-10-21T19:39:41.084Z",
  "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/bce9af1b030bf59d51bbabf909a3ef164787e44e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cbda6197929418fabf0e45ecf9b7a76360944c70"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50042.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50042"
    }
  ],
  "schema_version": "1.7.3",
  "summary": "ice: Fix increasing MSI-X on VF"
}