{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2022-48649",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/slab_common: fix possible double free of kmem_cache\n\nWhen doing slub_debug test, kfence's 'test_memcache_typesafe_by_rcu'\nkunit test case cause a use-after-free error:\n\n  BUG: KASAN: use-after-free in kobject_del+0x14/0x30\n  Read of size 8 at addr ffff888007679090 by task kunit_try_catch/261\n\n  CPU: 1 PID: 261 Comm: kunit_try_catch Tainted: G    B            N 6.0.0-rc5-next-20220916 #17\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\n  Call Trace:\n   <TASK>\n   dump_stack_lvl+0x34/0x48\n   print_address_description.constprop.0+0x87/0x2a5\n   print_report+0x103/0x1ed\n   kasan_report+0xb7/0x140\n   kobject_del+0x14/0x30\n   kmem_cache_destroy+0x130/0x170\n   test_exit+0x1a/0x30\n   kunit_try_run_case+0xad/0xc0\n   kunit_generic_run_threadfn_adapter+0x26/0x50\n   kthread+0x17b/0x1b0\n   </TASK>\n\nThe cause is inside kmem_cache_destroy():\n\nkmem_cache_destroy\n    acquire lock/mutex\n    shutdown_cache\n        schedule_work(kmem_cache_release) (if RCU flag set)\n    release lock/mutex\n    kmem_cache_release (if RCU flag not set)\n\nIn some certain timing, the scheduled work could be run before\nthe next RCU flag checking, which can then get a wrong value\nand lead to double kmem_cache_release().\n\nFix it by caching the RCU flag inside protected area, just like 'refcnt'"
            }
        ]
    },
    "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": "357321557920",
                                            "version_value": "c673c6ceac53"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "0495e337b703",
                                            "version_value": "d71608a87736"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "5.19.8",
                                            "version_value": "5.19.12"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/c673c6ceac53fb2e631c9fbbd79957099a08927f",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/c673c6ceac53fb2e631c9fbbd79957099a08927f"
            },
            {
                "url": "https://git.kernel.org/stable/c/d71608a877362becdc94191f190902fac1e64d35",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/d71608a877362becdc94191f190902fac1e64d35"
            }
        ]
    },
    "generator": {
        "engine": "bippy-9e1c9544281a"
    }
}