{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2024-26674",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-02-19T14:20:24.151Z",
        "datePublished": "2024-04-02T07:01:39.114Z",
        "dateUpdated": "2024-08-02T00:14:12.563Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2024-05-29T05:20:37.064Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/lib: Revert to _ASM_EXTABLE_UA() for {get,put}_user() fixups\n\nDuring memory error injection test on kernels >= v6.4, the kernel panics\nlike below. However, this issue couldn't be reproduced on kernels <= v6.3.\n\n  mce: [Hardware Error]: CPU 296: Machine Check Exception: f Bank 1: bd80000000100134\n  mce: [Hardware Error]: RIP 10:<ffffffff821b9776> {__get_user_nocheck_4+0x6/0x20}\n  mce: [Hardware Error]: TSC 411a93533ed ADDR 346a8730040 MISC 86\n  mce: [Hardware Error]: PROCESSOR 0:a06d0 TIME 1706000767 SOCKET 1 APIC 211 microcode 80001490\n  mce: [Hardware Error]: Run the above through 'mcelog --ascii'\n  mce: [Hardware Error]: Machine check: Data load in unrecoverable area of kernel\n  Kernel panic - not syncing: Fatal local machine check\n\nThe MCA code can recover from an in-kernel #MC if the fixup type is\nEX_TYPE_UACCESS, explicitly indicating that the kernel is attempting to\naccess userspace memory. However, if the fixup type is EX_TYPE_DEFAULT\nthe only thing that is raised for an in-kernel #MC is a panic.\n\nex_handler_uaccess() would warn if users gave a non-canonical addresses\n(with bit 63 clear) to {get, put}_user(), which was unexpected.\n\nTherefore, commit\n\n  b19b74bc99b1 (\"x86/mm: Rework address range check in get_user() and put_user()\")\n\nreplaced _ASM_EXTABLE_UA() with _ASM_EXTABLE() for {get, put}_user()\nfixups. However, the new fixup type EX_TYPE_DEFAULT results in a panic.\n\nCommit\n\n  6014bc27561f (\"x86-64: make access_ok() independent of LAM\")\n\nadded the check gp_fault_address_ok() right before the WARN_ONCE() in\nex_handler_uaccess() to not warn about non-canonical user addresses due\nto LAM.\n\nWith that in place, revert back to _ASM_EXTABLE_UA() for {get,put}_user()\nexception fixups in order to be able to handle in-kernel MCEs correctly\nagain.\n\n  [ bp: Massage commit message. ]"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/lib/getuser.S",
                        "arch/x86/lib/putuser.S"
                    ],
                    "versions": [
                        {
                            "version": "b19b74bc99b1",
                            "lessThan": "2aed1b6c33af",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b19b74bc99b1",
                            "lessThan": "2da241c5ed78",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b19b74bc99b1",
                            "lessThan": "8eed4e00a370",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "arch/x86/lib/getuser.S",
                        "arch/x86/lib/putuser.S"
                    ],
                    "versions": [
                        {
                            "version": "6.4",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.4",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.6.17",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.7.5",
                            "lessThanOrEqual": "6.7.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.8",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/2aed1b6c33afd8599d01c6532bbecb829480a674"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2da241c5ed78d0978228a1150735539fe1a60eca"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8eed4e00a370b37b4e5985ed983dccedd555ea9d"
                }
            ],
            "title": "x86/lib: Revert to _ASM_EXTABLE_UA() for {get,put}_user() fixups",
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                "engine": "bippy-a5840b7849dd"
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                            "content": {
                                "id": "CVE-2024-26674",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
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                                        "Automatable": "no"
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                                        "Technical Impact": "partial"
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                                "version": "2.0.3",
                                "timestamp": "2024-04-02T12:41:02.015400Z"
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                "title": "CISA ADP Vulnrichment",
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                    "dateUpdated": "2024-07-05T17:21:22.719Z"
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                    "shortName": "CVE",
                    "dateUpdated": "2024-08-02T00:14:12.563Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://git.kernel.org/stable/c/2aed1b6c33afd8599d01c6532bbecb829480a674",
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