{"id":"DEBIAN-CVE-2022-48649","details":"In the Linux kernel, the following vulnerability has been resolved:  mm/slab_common: fix possible double free of kmem_cache  When doing slub_debug test, kfence's 'test_memcache_typesafe_by_rcu' kunit test case cause a use-after-free error:    BUG: KASAN: use-after-free in kobject_del+0x14/0x30   Read of size 8 at addr ffff888007679090 by task kunit_try_catch/261    CPU: 1 PID: 261 Comm: kunit_try_catch Tainted: G    B            N 6.0.0-rc5-next-20220916 #17   Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014   Call Trace:    \u003cTASK\u003e    dump_stack_lvl+0x34/0x48    print_address_description.constprop.0+0x87/0x2a5    print_report+0x103/0x1ed    kasan_report+0xb7/0x140    kobject_del+0x14/0x30    kmem_cache_destroy+0x130/0x170    test_exit+0x1a/0x30    kunit_try_run_case+0xad/0xc0    kunit_generic_run_threadfn_adapter+0x26/0x50    kthread+0x17b/0x1b0    \u003c/TASK\u003e  The cause is inside kmem_cache_destroy():  kmem_cache_destroy     acquire lock/mutex     shutdown_cache         schedule_work(kmem_cache_release) (if RCU flag set)     release lock/mutex     kmem_cache_release (if RCU flag not set)  In some certain timing, the scheduled work could be run before the next RCU flag checking, which can then get a wrong value and lead to double kmem_cache_release().  Fix it by caching the RCU flag inside protected area, just like 'refcnt'","modified":"2026-08-27T23:04:17.245363478Z","published":"2024-04-28T13:15:07.333Z","upstream":["CVE-2022-48649"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-48649"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.2-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48649.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.2-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48649.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.2-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48649.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}