{"cve":"CVE-2022-48649","nvd":{"published":"2024-04-28T13:15:07.333","modified":"2026-06-17T05:15:49.197","status":"Analyzed","description":"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'","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-415","CWE-416"],"references":["https://git.kernel.org/stable/c/c673c6ceac53fb2e631c9fbbd79957099a08927f","https://git.kernel.org/stable/c/d71608a877362becdc94191f190902fac1e64d35","https://git.kernel.org/stable/c/c673c6ceac53fb2e631c9fbbd79957099a08927f","https://git.kernel.org/stable/c/d71608a877362becdc94191f190902fac1e64d35"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:49:08.435428910+00:00"},"epss":{"cve":"CVE-2022-48649","score":0.00217,"percentile":0.12214,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}