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CVE-2022-50402— drivers/md/md-bitmap: check the return value of md_bitmap_get_counter()

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，该漏洞源于未检查md_bitmap_get_counter返回值，可能导致空指针取消引用。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux d60b479d177a5735b6b4db6ee5280ef6653f50e7< 21e9aac9a74d30907d44bae0d24c036cb3819406 affected
d60b479d177a5735b6b4db6ee5280ef6653f50e7< 5d8d046f3dba939e74e2414f009df426700430ed affected
d60b479d177a5735b6b4db6ee5280ef6653f50e7< 100caacfa0ed26e061954c90cdc835d42f709536 affected
d60b479d177a5735b6b4db6ee5280ef6653f50e7< b621d17fe8b079574c773800148fb86907f3445d affected
d60b479d177a5735b6b4db6ee5280ef6653f50e7< ff3b7e12bc9f50de05c9d82b5b79e23e5be888f1 affected
d60b479d177a5735b6b4db6ee5280ef6653f50e7< 99bef41f8e8d1d52b5cb34f2f193f1346192752b affected
d60b479d177a5735b6b4db6ee5280ef6653f50e7< 3bd548e5b819b8c0f2c9085de775c5c7bff9052f affected
3.5 affected
… +8 more rows
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I. Basic Information for CVE-2022-50402

Vulnerability Information
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Vulnerability Title
drivers/md/md-bitmap: check the return value of md_bitmap_get_counter()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drivers/md/md-bitmap: check the return value of md_bitmap_get_counter() Check the return value of md_bitmap_get_counter() in case it returns NULL pointer, which will result in a null pointer dereference. v2: update the check to include other dereference
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，该漏洞源于未检查md_bitmap_get_counter返回值，可能导致空指针取消引用。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux d60b479d177a5735b6b4db6ee5280ef6653f50e7 ~ 21e9aac9a74d30907d44bae0d24c036cb3819406 -
Linux Linux 3.5 -

II. Public POCs for CVE-2022-50402

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III. Intelligence Information for CVE-2022-50402

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Same Patch Batch · Linux · 2025-09-18 · 121 CVEs total

CVE-2022-50410 9.8 CRITICAL NFSD: Protect against send buffer overflow in NFSv2 READ
CVE-2022-50401 9.8 CRITICAL nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure
CVE-2023-53382 9.8 CRITICAL net/smc: Reset connection when trying to use SMCRv2 fails.
CVE-2022-50419 8.8 HIGH Bluetooth: hci_sysfs: Fix attempting to call device_add multiple times
CVE-2022-50413 8.8 HIGH wifi: mac80211: fix use-after-free
CVE-2023-53431 8.8 HIGH scsi: ses: Handle enclosure with just a primary component gracefully
CVE-2023-53432 8.8 HIGH firewire: net: fix use after free in fwnet_finish_incoming_packet()
CVE-2023-53374 8.8 HIGH Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early
CVE-2022-50386 8.8 HIGH Bluetooth: L2CAP: Fix user-after-free
CVE-2023-53372 8.2 HIGH sctp: fix a potential overflow in sctp_ifwdtsn_skip
CVE-2022-50399 7.8 HIGH media: atomisp: prevent integer overflow in sh_css_set_black_frame()
CVE-2023-53398 7.8 HIGH mlx5: fix possible ptp queue fifo use-after-free
CVE-2023-53394 7.8 HIGH net/mlx5e: xsk: Fix crash on regular rq reactivation
CVE-2022-50417 7.8 HIGH drm/panfrost: Fix GEM handle creation ref-counting
CVE-2023-53429 7.8 HIGH btrfs: don't check PageError in __extent_writepage
CVE-2023-53373 7.8 HIGH crypto: seqiv - Handle EBUSY correctly
CVE-2023-53387 7.8 HIGH scsi: ufs: core: Fix device management cmd timeout flow
CVE-2023-53378 7.8 HIGH drm/i915/dpt: Treat the DPT BO as a framebuffer
CVE-2023-53386 7.8 HIGH Bluetooth: Fix potential use-after-free when clear keys
CVE-2023-53426 7.8 HIGH xsk: Fix xsk_diag use-after-free error during socket cleanup

Showing top 20 of 121 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50402

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