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CVE-2021-46932— Input: appletouch - initialize work before device registration

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 appletouch 设备注册前没有进行初始化。

AI Predicted 3.3 Difficulty: Trivial EPSS 0.23% · P13

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 5a6eb676d3bc4d7a6feab200a92437b62ad298da< d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4 affected
5a6eb676d3bc4d7a6feab200a92437b62ad298da< d1962f263a176f493400b8f91bfbf2bfedce951e affected
5a6eb676d3bc4d7a6feab200a92437b62ad298da< 292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99f affected
5a6eb676d3bc4d7a6feab200a92437b62ad298da< a02e1404e27855089d2b0a0acc4652c2ce65fe46 affected
5a6eb676d3bc4d7a6feab200a92437b62ad298da< 975774ea7528b489930b76a77ffc4d5379b95ff2 affected
5a6eb676d3bc4d7a6feab200a92437b62ad298da< 9f329d0d6c91142cf0ad08d23c72dd195db2633c affected
5a6eb676d3bc4d7a6feab200a92437b62ad298da< e79ff8c68acb1eddf709d3ac84716868f2a91012 affected
5a6eb676d3bc4d7a6feab200a92437b62ad298da< 9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0 affected
… +10 more rows
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I. Basic Information for CVE-2021-46932

Vulnerability Information
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Vulnerability Title
Input: appletouch - initialize work before device registration
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: Input: appletouch - initialize work before device registration Syzbot has reported warning in __flush_work(). This warning is caused by work->func == NULL, which means missing work initialization. This may happen, since input_dev->close() calls cancel_work_sync(&dev->work), but dev->work initalization happens _after_ input_register_device() call. So this patch moves dev->work initialization before registering input device
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 appletouch 设备注册前没有进行初始化。
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 5a6eb676d3bc4d7a6feab200a92437b62ad298da ~ d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4 -
Linux Linux 2.6.23 -

II. Public POCs for CVE-2021-46932

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III. Intelligence Information for CVE-2021-46932

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Other References for CVE-2021-46932 (8)

Same Patch Batch · Linux · 2024-02-27 · 67 CVEs total

CVE-2021-46911 9.8 CRITICAL ch_ktls: Fix kernel panic
CVE-2021-46955 8.2 HIGH openvswitch: fix stack OOB read while fragmenting IPv4 packets
CVE-2021-46963 7.8 HIGH scsi: qla2xxx: Fix crash in qla2xxx_mqueuecommand()
CVE-2021-46925 7.8 HIGH net/smc: fix kernel panic caused by race of smc_sock
CVE-2021-46929 7.8 HIGH sctp: use call_rcu to free endpoint
CVE-2021-46913 7.8 HIGH netfilter: nftables: clone set element expression template
CVE-2021-46973 7.8 HIGH net: qrtr: Avoid potential use after free in MHI send
CVE-2021-46936 7.8 HIGH net: fix use-after-free in tw_timer_handler
CVE-2021-46958 7.8 HIGH btrfs: fix race between transaction aborts and fsyncs leading to use-after-free
CVE-2021-46969 7.8 HIGH bus: mhi: core: Fix invalid error returning in mhi_queue
CVE-2021-46933 7.8 HIGH usb: gadget: f_fs: Clear ffs_eventfd in ffs_data_clear.
CVE-2021-46967 7.8 HIGH vhost-vdpa: fix vm_flags for virtqueue doorbell mapping
CVE-2021-46921 7.8 HIGH locking/qrwlock: Fix ordering in queued_write_lock_slowpath()
CVE-2021-46922 7.8 HIGH KEYS: trusted: Fix TPM reservation for seal/unseal
CVE-2021-46948 7.5 HIGH sfc: farch: fix TX queue lookup in TX event handling
CVE-2021-46960 7.5 HIGH cifs: Return correct error code from smb2_get_enc_key
CVE-2021-46912 7.3 HIGH net: Make tcp_allowed_congestion_control readonly in non-init netns
CVE-2021-46908 7.1 HIGH bpf: Use correct permission flag for mixed signed bounds arithmetic
CVE-2021-46974 7.1 HIGH bpf: Fix masking negation logic upon negative dst register
CVE-2021-46910 7.0 HIGH ARM: 9063/1: mm: reduce maximum number of CPUs if DEBUG_KMAP_LOCAL is enabled

Showing top 20 of 67 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-46932

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