{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-49933",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblk_iocost: fix more out of bound shifts\n\nRecently running UBSAN caught few out of bound shifts in the\nioc_forgive_debts() function:\n\nUBSAN: shift-out-of-bounds in block/blk-iocost.c:2142:38\nshift exponent 80 is too large for 64-bit type 'u64' (aka 'unsigned long\nlong')\n...\nUBSAN: shift-out-of-bounds in block/blk-iocost.c:2144:30\nshift exponent 80 is too large for 64-bit type 'u64' (aka 'unsigned long\nlong')\n...\nCall Trace:\n<IRQ>\ndump_stack_lvl+0xca/0x130\n__ubsan_handle_shift_out_of_bounds+0x22c/0x280\n? __lock_acquire+0x6441/0x7c10\nioc_timer_fn+0x6cec/0x7750\n? blk_iocost_init+0x720/0x720\n? call_timer_fn+0x5d/0x470\ncall_timer_fn+0xfa/0x470\n? blk_iocost_init+0x720/0x720\n__run_timer_base+0x519/0x700\n...\n\nActual impact of this issue was not identified but I propose to fix the\nundefined behaviour.\nThe proposed fix to prevent those out of bound shifts consist of\nprecalculating exponent before using it the shift operations by taking\nmin value from the actual exponent and maximum possible number of bits."
            }
        ]
    },
    "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": "7caa47151ab2",
                                            "version_value": "1f61d509257d"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.4",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.4",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.10.227",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.15.168",
                                                        "lessThanOrEqual": "5.15.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.1.113",
                                                        "lessThanOrEqual": "6.1.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.6.55",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.10.14",
                                                        "lessThanOrEqual": "6.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
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                                                        "version": "6.11.3",
                                                        "lessThanOrEqual": "6.11.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.12",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
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                                                ],
                                                "defaultStatus": "affected"
                                            }
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                        ]
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    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/1f61d509257d6a05763d05bf37943b35306522b1",
                "refsource": "MISC",
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            {
                "url": "https://git.kernel.org/stable/c/59121bb38fdc01434ea3fe361ee02b59f036227f",
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                "name": "https://git.kernel.org/stable/c/1ab2cfe19700fb3dde4c7dfec392acff34db3120"
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