CVE-2022-50342— floppy: Fix memory leak in do_floppy_init()
Quick assessment
Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于floppy_alloc_disk失败时未释放内存，可能导致内存泄漏。
Possible ATT&CK Techniques 1 AI
T1562.008Affected Version Matrix 10
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 302cfee150291c6cd85b1ca197d062d0b423d09c< f36d8c8651506aea5f09899f5356ece5d1384f50 |
affected |
302cfee150291c6cd85b1ca197d062d0b423d09c< 75d8c8851a4da0190c2480e84315b5fd3d0356c5 |
affected | ||
302cfee150291c6cd85b1ca197d062d0b423d09c< 55b3c66a0d441cd37154ae95e44d0b82ccfd580e |
affected | ||
302cfee150291c6cd85b1ca197d062d0b423d09c< f8ace2e304c5dd8a7328db9cd2b8a4b1b98d83ec |
affected | ||
5.11 |
affected | ||
< 5.11 |
unaffected | ||
5.15.86≤ 5.15.* |
unaffected | ||
6.0.16≤ 6.0.* |
unaffected | ||
| … +2 more rows | |||
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2022-50342
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
floppy: Fix memory leak in do_floppy_init()
Source: CVE Program / CVE List V5
Vulnerability Description
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:
[<000000007f457abb>] __kmalloc_node+0x4c/0xc0
[<00000000a87bfa9e>] blk_mq_realloc_tag_set_tags.part.0+0x6f/0x180
[<000000006f02e8b1>] blk_mq_alloc_tag_set+0x573/0x1130
[<0000000066007fd7>] 0xffffffffc06b8b08
[<0000000081f5ac40>] do_one_initcall+0xd0/0x4f0
[<00000000e26d04ee>] do_init_module+0x1a4/0x680
[<000000001bb22407>] load_module+0x6249/0x7110
[<00000000ad31ac4d>] __do_sys_finit_module+0x140/0x200
[<000000007bddca46>] do_syscall_64+0x35/0x80
[<00000000b5afec39>] 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:
[<000000007f457abb>] __kmalloc_node+0x4c/0xc0
[<000000006b91eab4>] blk_mq_alloc_tag_set+0x393/0x1130
[<0000000066007fd7>] 0xffffffffc06b8b08
[<0000000081f5ac40>] do_one_initcall+0xd0/0x4f0
[<00000000e26d04ee>] do_init_module+0x1a4/0x680
[<000000001bb22407>] load_module+0x6249/0x7110
[<00000000ad31ac4d>] __do_sys_finit_module+0x140/0x200
[<000000007bddca46>] do_syscall_64+0x35/0x80
[<00000000b5afec39>] 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 < N_DRIVE; drive++)
blk_mq_alloc_tag_set()
blk_mq_alloc_tag_set_tags()
blk_mq_realloc_tag_set_tags() # set->tag allocated
floppy_alloc_disk()
blk_mq_alloc_disk() # error occurred, disks failed to allocated
->out_put_disk:
for (drive = 0; drive < N_DRIVE; drive++)
if (!disks[drive][0]) # the last disks is not set and loop break
break;
blk_mq_free_tag_set() # the latest allocated set->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]
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于floppy_alloc_disk失败时未释放内存，可能导致内存泄漏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2022-50342
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2022-50342
请登录查看更多情报信息。
Same Patch Batch · Linux · 2025-09-16 · 115 CVEs total
| CVE-2022-50350 | 9.8 CRITICAL | scsi: target: iscsi: Fix a race condition between login_work and the login thread |
| CVE-2025-39806 | 8.8 HIGH | HID: multitouch: fix slab out-of-bounds access in mt_report_fixup() |
| CVE-2023-53305 | 8.8 HIGH | Bluetooth: L2CAP: Fix use-after-free |
| CVE-2025-39827 | 8.8 HIGH | net: rose: include node references in rose_neigh refcount |
| CVE-2025-39826 | 8.8 HIGH | net: rose: convert 'use' field to refcount_t |
| CVE-2023-53297 | 8.8 HIGH | Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp |
| CVE-2023-53322 | 8.8 HIGH | scsi: qla2xxx: Wait for io return on terminate rport |
| CVE-2023-53315 | 8.8 HIGH | wifi: ath11k: Fix SKB corruption in REO destination ring |
| CVE-2025-39809 | 8.4 HIGH | HID: intel-thc-hid: intel-quicki2c: Fix ACPI dsd ICRS/ISUB length |
| CVE-2023-53333 | 8.2 HIGH | netfilter: conntrack: dccp: copy entire header to stack buffer, not just basic one |
| CVE-2025-39818 | 7.8 HIGH | HID: intel-thc-hid: intel-thc: Fix incorrect pointer arithmetic in I2C regs save |
| CVE-2025-39810 | 7.8 HIGH | bnxt_en: Fix memory corruption when FW resources change during ifdown |
| CVE-2023-53311 | 7.8 HIGH | nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput |
| CVE-2022-50341 | 7.8 HIGH | cifs: fix oops during encryption |
| CVE-2023-53314 | 7.8 HIGH | fbdev/ep93xx-fb: Do not assign to struct fb_info.dev |
| CVE-2025-39815 | 7.8 HIGH | RISC-V: KVM: fix stack overrun when loading vlenb |
| CVE-2023-53286 | 7.8 HIGH | RDMA/mlx5: Return the firmware result upon destroying QP/RQ |
| CVE-2023-53331 | 7.8 HIGH | pstore/ram: Check start of empty przs during init |
| CVE-2023-53274 | 7.8 HIGH | clk: mediatek: mt8183: Add back SSPM related clocks |
| CVE-2023-53263 | 7.8 HIGH | drm/nouveau/disp: fix use-after-free in error handling of nouveau_connector_create |
Showing top 20 of 115 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
-
CVE-2023-7356
Bluetooth: ISO: Copy BASE if service data matches EIR_BAA_SE -
CVE-2026-98869
bpf: Infer zext_dst based on static register liveness analys -
CVE-2026-98868
dm-pcache: reject a kset that overruns its segment -
CVE-2026-98867
dm-pcache: bound the logical key offset from persistent memo -
CVE-2026-98866
sched/cache: Introduce task_struct->sched_cache_grp to fix U
Same vendor: Linux
-
CVE-2023-7356
Bluetooth: ISO: Copy BASE if service data matches EIR_BAA_SE -
CVE-2026-98869
bpf: Infer zext_dst based on static register liveness analys -
CVE-2026-98868
dm-pcache: reject a kset that overruns its segment -
CVE-2026-98867
dm-pcache: bound the logical key offset from persistent memo -
CVE-2026-98866
sched/cache: Introduce task_struct->sched_cache_grp to fix U
V. Comments for CVE-2022-50342
No comments yet