{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-50042",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "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 > /sys/bus/pci/devices/$PF_PCI/sriov_drivers_autoprobe\n  echo 1 > /sys/bus/pci/devices/$PF_PCI/sriov_numvfs\n  echo 17 > /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."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "2a2cb4c6c181",
                                            "version_value": "cbda61979294"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "6.8",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "6.8",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.11.4",
                                                        "lessThanOrEqual": "6.11.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.12-rc3",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
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    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/cbda6197929418fabf0e45ecf9b7a76360944c70",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/cbda6197929418fabf0e45ecf9b7a76360944c70"
            },
            {
                "url": "https://git.kernel.org/stable/c/bce9af1b030bf59d51bbabf909a3ef164787e44e",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/bce9af1b030bf59d51bbabf909a3ef164787e44e"
            }
        ]
    },
    "generator": {
        "engine": "bippy-c9c4e1df01b2"
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}