{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2022-48674",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix pcluster use-after-free on UP platforms\n\nDuring stress testing with CONFIG_SMP disabled, KASAN reports as below:\n\n==================================================================\nBUG: KASAN: use-after-free in __mutex_lock+0xe5/0xc30\nRead of size 8 at addr ffff8881094223f8 by task stress/7789\n\nCPU: 0 PID: 7789 Comm: stress Not tainted 6.0.0-rc1-00002-g0d53d2e882f9 #3\nHardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011\nCall Trace:\n <TASK>\n..\n __mutex_lock+0xe5/0xc30\n..\n z_erofs_do_read_page+0x8ce/0x1560\n..\n z_erofs_readahead+0x31c/0x580\n..\nFreed by task 7787\n kasan_save_stack+0x1e/0x40\n kasan_set_track+0x20/0x30\n kasan_set_free_info+0x20/0x40\n __kasan_slab_free+0x10c/0x190\n kmem_cache_free+0xed/0x380\n rcu_core+0x3d5/0xc90\n __do_softirq+0x12d/0x389\n\nLast potentially related work creation:\n kasan_save_stack+0x1e/0x40\n __kasan_record_aux_stack+0x97/0xb0\n call_rcu+0x3d/0x3f0\n erofs_shrink_workstation+0x11f/0x210\n erofs_shrink_scan+0xdc/0x170\n shrink_slab.constprop.0+0x296/0x530\n drop_slab+0x1c/0x70\n drop_caches_sysctl_handler+0x70/0x80\n proc_sys_call_handler+0x20a/0x2f0\n vfs_write+0x555/0x6c0\n ksys_write+0xbe/0x160\n do_syscall_64+0x3b/0x90\n\nThe root cause is that erofs_workgroup_unfreeze() doesn't reset to\norig_val thus it causes a race that the pcluster reuses unexpectedly\nbefore freeing.\n\nSince UP platforms are quite rare now, such path becomes unnecessary.\nLet's drop such specific-designed path directly instead."
            }
        ]
    },
    "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": "73f5c66df3e2",
                                            "version_value": "8ddd001cef5e"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.0",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.0",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.15.68",
                                                        "lessThanOrEqual": "5.15.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.19.9",
                                                        "lessThanOrEqual": "5.19.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.0",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
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                                                "defaultStatus": "affected"
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    "references": {
        "reference_data": [
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                "url": "https://git.kernel.org/stable/c/8ddd001cef5e82d19192e6861068463ecca5f556",
                "refsource": "MISC",
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                "name": "https://git.kernel.org/stable/c/94c34faaafe7b55adc2d8d881db195b646959b9e"
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