cbcvebase.
CVE-2022-48869
published 2024-08-21

CVE-2022-48869: In the Linux kernel, the following vulnerability has been resolved: USB: gadgetfs: Fix race between mounting and unmounting The syzbot fuzzer and Gerald Lee…

PriorityP418medium4.7CVSS 3.1
AVLACHPRLUINSUCNINAH
EPSS
0.23%
14.2th percentile
In the Linux kernel, the following vulnerability has been resolved: USB: gadgetfs: Fix race between mounting and unmounting The syzbot fuzzer and Gerald Lee have identified a use-after-free bug in the gadgetfs driver, involving processes concurrently mounting and unmounting the gadgetfs filesystem. In particular, gadgetfs_fill_super() can race with gadgetfs_kill_sb(), causing the latter to deallocate the_device while the former is using it. The output from KASAN says, in part: BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:102 [inline] BUG: KASAN: use-after-free in atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:176 [inline] BUG: KASAN: use-after-free in __refcount_sub_and_test include/linux/refcount.h:272 [inline] BUG: KASAN: use-after-free in __refcount_dec_and_test include/linux/refcount.h:315 [inline] BUG: KASAN: use-after-free in refcount_dec_and_test include/linux/refcount.h:333 [inline] BUG: KASAN: use-after-free in put_dev drivers/usb/gadget/legacy/inode.c:159 [inline] BUG: KASAN: use-after-free in gadgetfs_kill_sb+0x33/0x100 drivers/usb/gadget/legacy/inode.c:2086 Write of size 4 at addr ffff8880276d7840 by task syz-executor126/18689 CPU: 0 PID: 18689 Comm: syz-executor126 Not tainted 6.1.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: ... atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:176 [inline] __refcount_sub_and_test include/linux/refcount.h:272 [inline] __refcount_dec_and_test include/linux/refcount.h:315 [inline] refcount_dec_and_test include/linux/refcount.h:333 [inline] put_dev drivers/usb/gadget/legacy/inode.c:159 [inline] gadgetfs_kill_sb+0x33/0x100 drivers/usb/gadget/legacy/inode.c:2086 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 vfs_get_super fs/super.c:1190 [inline] get_tree_single+0xd0/0x160 fs/super.c:1207 vfs_get_tree+0x88/0x270 fs/super.c:1531 vfs_fsconfig_locked fs/fsopen.c:232 [in

Affected

15 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.8-1 (bookworm)linux 6.1.8-1 (bookworm)
linuxlinux——
linuxlinux>= e5d82a7360d124ae1a38c2a5eac92ba49b125191 < 9a39f4626b361ee7aa10fd990401c37ec3b466ae9a39f4626b361ee7aa10fd990401c37ec3b466ae
linuxlinux>= e5d82a7360d124ae1a38c2a5eac92ba49b125191 < 856e4b5e53f21edbd15d275dde62228dd94fb2b4856e4b5e53f21edbd15d275dde62228dd94fb2b4
linuxlinux>= e5d82a7360d124ae1a38c2a5eac92ba49b125191 < a2e075f40122d8daf587db126c562a67abd69cf9a2e075f40122d8daf587db126c562a67abd69cf9
linuxlinux>= e5d82a7360d124ae1a38c2a5eac92ba49b125191 < 616fd34d017000ecf9097368b13d8a266f4920b3616fd34d017000ecf9097368b13d8a266f4920b3
linuxlinux>= e5d82a7360d124ae1a38c2a5eac92ba49b125191 < d18dcfe9860e842f394e37ba01ca9440ab2178f4d18dcfe9860e842f394e37ba01ca9440ab2178f4
linuxlinux_kernel>= 0 < 5.10.178-15.10.178-1
linuxlinux_kernel>= 0 < 6.1.8-16.1.8-1
linuxlinux_kernel>= 0 < 6.1.8-16.1.8-1
linuxlinux_kernel>= 0 < 6.1.8-16.1.8-1
linuxlinux_kernel>= 5.11 < 5.15.905.15.90
linuxlinux_kernel>= 5.16 < 6.1.86.1.8
linuxlinux_kernel>= 5.3 < 5.4.2305.4.230
linuxlinux_kernel>= 5.5 < 5.10.1655.10.165

CVSS provenance

nvdv3.14.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
osv4.7MEDIUM
vendor_debian4.7MEDIUM
vendor_redhat4.7MEDIUM
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