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CVE-2022-50767— fbdev: smscufx: Fix several use-after-free bugs

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，该漏洞源于物理移除USB设备时存在多个释放后重用漏洞。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 3c8a63e22a0802fd56380f6ab305b419f18eb6f5< 6f2075ea883e5d7730d0c9ebb1bb8e7a1a7e953f affected
3c8a63e22a0802fd56380f6ab305b419f18eb6f5< 3f40852d671072836fb7ae331a1f28a24223c4e8 affected
3c8a63e22a0802fd56380f6ab305b419f18eb6f5< 70faf9d9b6cc74418716bbf76fe75bd2da10ad4a affected
3c8a63e22a0802fd56380f6ab305b419f18eb6f5< 5385af2f89bc352fb70753ab41b2bb036190141f affected
3c8a63e22a0802fd56380f6ab305b419f18eb6f5< d9ddfeb01fb95ffbbc7031d46a5ee2a5e45cbb86 affected
3c8a63e22a0802fd56380f6ab305b419f18eb6f5< cc6a7249842fceda7574ceb63275a2d5e99d2862 affected
3c8a63e22a0802fd56380f6ab305b419f18eb6f5< 8d924b262f3178a9b17c17d4306a9f426c508bd9 affected
3c8a63e22a0802fd56380f6ab305b419f18eb6f5< cc67482c9e5f2c80d62f623bcc347c29f9f648e1 affected
… +10 more rows
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I. Basic Information for CVE-2022-50767

Vulnerability Information
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Vulnerability Title
fbdev: smscufx: Fix several use-after-free bugs
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fbdev: smscufx: Fix several use-after-free bugs Several types of UAFs can occur when physically removing a USB device. Adds ufx_ops_destroy() function to .fb_destroy of fb_ops, and in this function, there is kref_put() that finally calls ufx_free(). This fix prevents multiple UAFs.
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，该漏洞源于物理移除USB设备时存在多个释放后重用漏洞。
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 3c8a63e22a0802fd56380f6ab305b419f18eb6f5 ~ 6f2075ea883e5d7730d0c9ebb1bb8e7a1a7e953f -
Linux Linux 3.2 -

II. Public POCs for CVE-2022-50767

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III. Intelligence Information for CVE-2022-50767

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Other References for CVE-2022-50767 (3)

Same Patch Batch · Linux · 2025-12-24 · 322 CVEs total

CVE-2025-68741 9.8 CRITICAL scsi: qla2xxx: Fix improper freeing of purex item
CVE-2023-53867 9.8 CRITICAL ceph: fix potential use-after-free bug when trimming caps
CVE-2025-68726 9.8 CRITICAL crypto: aead - Fix reqsize handling
CVE-2025-68745 9.8 CRITICAL scsi: qla2xxx: Clear cmds after chip reset
CVE-2023-54094 9.8 CRITICAL net: prevent skb corruption on frag list segmentation
CVE-2023-54090 9.8 CRITICAL ixgbe: Fix panic during XDP_TX with > 64 CPUs
CVE-2023-54076 9.8 CRITICAL smb: client: fix missed ses refcounting
CVE-2022-50717 9.8 CRITICAL nvmet-tcp: add bounds check on Transfer Tag
CVE-2025-68359 9.8 CRITICAL btrfs: fix double free of qgroup record after failure to add delayed ref head
CVE-2023-53996 9.3 CRITICAL x86/sev: Make enc_dec_hypercall() accept a size instead of npages
CVE-2023-54071 8.8 HIGH wifi: rtw88: use work to update rate to avoid RCU warning
CVE-2023-54120 8.8 HIGH Bluetooth: Fix race condition in hidp_session_thread
CVE-2023-54043 8.8 HIGH iommufd: Do not add the same hwpt to the ioas->hwpt_list twice
CVE-2022-50732 8.8 HIGH staging: rtl8192u: Fix use after free in ieee80211_rx()
CVE-2023-54092 8.8 HIGH KVM: s390: pv: fix index value of replaced ASCE
CVE-2023-54060 8.8 HIGH iommufd: Set end correctly when doing batch carry
CVE-2025-68736 8.8 HIGH landlock: Fix handling of disconnected directories
CVE-2023-54040 8.8 HIGH ice: fix wrong fallback logic for FDIR
CVE-2023-53986 8.6 HIGH mips: bmips: BCM6358: disable RAC flush for TP1
CVE-2022-50746 8.4 HIGH erofs: validate the extent length for uncompressed pclusters

Showing top 20 of 322 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50767

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