{"id":"DEBIAN-CVE-2022-48674","details":"In the Linux kernel, the following vulnerability has been resolved:  erofs: fix pcluster use-after-free on UP platforms  During stress testing with CONFIG_SMP disabled, KASAN reports as below:  ================================================================== BUG: KASAN: use-after-free in __mutex_lock+0xe5/0xc30 Read of size 8 at addr ffff8881094223f8 by task stress/7789  CPU: 0 PID: 7789 Comm: stress Not tainted 6.0.0-rc1-00002-g0d53d2e882f9 #3 Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011 Call Trace:  \u003cTASK\u003e ..  __mutex_lock+0xe5/0xc30 ..  z_erofs_do_read_page+0x8ce/0x1560 ..  z_erofs_readahead+0x31c/0x580 .. Freed by task 7787  kasan_save_stack+0x1e/0x40  kasan_set_track+0x20/0x30  kasan_set_free_info+0x20/0x40  __kasan_slab_free+0x10c/0x190  kmem_cache_free+0xed/0x380  rcu_core+0x3d5/0xc90  __do_softirq+0x12d/0x389  Last potentially related work creation:  kasan_save_stack+0x1e/0x40  __kasan_record_aux_stack+0x97/0xb0  call_rcu+0x3d/0x3f0  erofs_shrink_workstation+0x11f/0x210  erofs_shrink_scan+0xdc/0x170  shrink_slab.constprop.0+0x296/0x530  drop_slab+0x1c/0x70  drop_caches_sysctl_handler+0x70/0x80  proc_sys_call_handler+0x20a/0x2f0  vfs_write+0x555/0x6c0  ksys_write+0xbe/0x160  do_syscall_64+0x3b/0x90  The root cause is that erofs_workgroup_unfreeze() doesn't reset to orig_val thus it causes a race that the pcluster reuses unexpectedly before freeing.  Since UP platforms are quite rare now, such path becomes unnecessary. Let's drop such specific-designed path directly instead.","modified":"2026-09-01T16:05:28.779837497Z","published":"2024-05-03T15:15:07.580Z","upstream":["CVE-2022-48674"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-48674"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.19.11-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48674.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.19.11-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48674.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.19.11-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-48674.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"}]}