cbcvebase.
CVE-2022-50342
published 2025-09-16

CVE-2022-50342: In the Linux kernel, the following vulnerability has been resolved: floppy: Fix memory leak in do_floppy_init() A memory leak was reported when…

PriorityP417medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.14%
4.2th percentile
In the Linux kernel, the following vulnerability has been resolved: floppy: Fix memory leak in do_floppy_init() A memory leak was reported when floppy_alloc_disk() failed in do_floppy_init(). unreferenced object 0xffff888115ed25a0 (size 8): comm "modprobe", pid 727, jiffies 4295051278 (age 25.529s) hex dump (first 8 bytes): 00 ac 67 5b 81 88 ff ff ..g[.... backtrace: [] __kmalloc_node+0x4c/0xc0 [] blk_mq_realloc_tag_set_tags.part.0+0x6f/0x180 [] blk_mq_alloc_tag_set+0x573/0x1130 [] 0xffffffffc06b8b08 [] do_one_initcall+0xd0/0x4f0 [] do_init_module+0x1a4/0x680 [] load_module+0x6249/0x7110 [] __do_sys_finit_module+0x140/0x200 [] do_syscall_64+0x35/0x80 [] entry_SYSCALL_64_after_hwframe+0x46/0xb0 unreferenced object 0xffff88810fc30540 (size 32): comm "modprobe", pid 727, jiffies 4295051278 (age 25.529s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] __kmalloc_node+0x4c/0xc0 [] blk_mq_alloc_tag_set+0x393/0x1130 [] 0xffffffffc06b8b08 [] do_one_initcall+0xd0/0x4f0 [] do_init_module+0x1a4/0x680 [] load_module+0x6249/0x7110 [] __do_sys_finit_module+0x140/0x200 [] do_syscall_64+0x35/0x80 [] entry_SYSCALL_64_after_hwframe+0x46/0xb0 If the floppy_alloc_disk() failed, disks of current drive will not be set, thus the lastest allocated set->tag cannot be freed in the error handling path. A simple call graph shown as below: floppy_module_init() floppy_init() do_floppy_init() for (drive = 0; drive tag allocated floppy_alloc_disk() blk_mq_alloc_disk() # error occurred, disks failed to allocated ->out_put_disk: for (drive = 0; drive tag leaked Fix this problem by free the set->tag of current drive before jump to error handling path. [efremov: added stable list, changed title]

Affected

12 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.4-1 (bookworm)linux 6.1.4-1 (bookworm)
linuxlinux——
linuxlinux>= 302cfee150291c6cd85b1ca197d062d0b423d09c < f36d8c8651506aea5f09899f5356ece5d1384f50f36d8c8651506aea5f09899f5356ece5d1384f50
linuxlinux>= 302cfee150291c6cd85b1ca197d062d0b423d09c < 75d8c8851a4da0190c2480e84315b5fd3d0356c575d8c8851a4da0190c2480e84315b5fd3d0356c5
linuxlinux>= 302cfee150291c6cd85b1ca197d062d0b423d09c < 55b3c66a0d441cd37154ae95e44d0b82ccfd580e55b3c66a0d441cd37154ae95e44d0b82ccfd580e
linuxlinux>= 302cfee150291c6cd85b1ca197d062d0b423d09c < f8ace2e304c5dd8a7328db9cd2b8a4b1b98d83ecf8ace2e304c5dd8a7328db9cd2b8a4b1b98d83ec
linuxlinux_kernel>= 0 < 6.1.4-16.1.4-1
linuxlinux_kernel>= 0 < 6.1.4-16.1.4-1
linuxlinux_kernel>= 0 < 6.1.4-16.1.4-1
linuxlinux_kernel>= 5.11 < 5.15.865.15.86
linuxlinux_kernel>= 5.16 < 6.0.166.0.16
linuxlinux_kernel>= 6.1 < 6.1.26.1.2

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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