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CVE-2021-47120— HID: magicmouse: fix NULL-deref on disconnect

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 HID 模块中存在错误。

AI Predicted 3.3 Difficulty: Trivial EPSS 0.24% · P13

Possible ATT&CK Techniques 1 AI

T1001 · Data Obfuscation

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 9d7b18668956c411a422d04c712994c5fdb23a4b< 368c5d45a87e1bcc7f1e98e0c255c37b7b12c5d6 affected
9d7b18668956c411a422d04c712994c5fdb23a4b< b5d013c4c76b276890135b5d32803c4c63924b77 affected
9d7b18668956c411a422d04c712994c5fdb23a4b< 9cf27473f21913a3eaf4702dd2a25415afd5f33f affected
9d7b18668956c411a422d04c712994c5fdb23a4b< 4b4f6cecca446abcb686c6e6c451d4f1ec1a7497 affected
4.20 affected
< 4.20 unaffected
5.4.125≤ 5.4.* unaffected
5.10.43≤ 5.10.* unaffected
… +2 more rows
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I. Basic Information for CVE-2021-47120

Vulnerability Information
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Vulnerability Title
HID: magicmouse: fix NULL-deref on disconnect
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: HID: magicmouse: fix NULL-deref on disconnect Commit 9d7b18668956 ("HID: magicmouse: add support for Apple Magic Trackpad 2") added a sanity check for an Apple trackpad but returned success instead of -ENODEV when the check failed. This means that the remove callback will dereference the never-initialised driver data pointer when the driver is later unbound (e.g. on USB disconnect).
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 HID 模块中存在错误。
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 9d7b18668956c411a422d04c712994c5fdb23a4b ~ 368c5d45a87e1bcc7f1e98e0c255c37b7b12c5d6 -
Linux Linux 4.20 -

II. Public POCs for CVE-2021-47120

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III. Intelligence Information for CVE-2021-47120

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Other References for CVE-2021-47120 (4)

Same Patch Batch · Linux · 2024-03-15 · 26 CVEs total

CVE-2021-47111 8.8 HIGH xen-netback: take a reference to the RX task thread
CVE-2021-47131 8.1 HIGH net/tls: Fix use-after-free after the TLS device goes down and up
CVE-2021-47123 7.8 HIGH io_uring: fix ltout double free on completion race
CVE-2021-47135 7.8 HIGH mt76: mt7921: fix possible AOOB issue in mt7921_mcu_tx_rate_report
CVE-2021-47129 7.8 HIGH netfilter: nft_ct: skip expectations for confirmed conntrack
CVE-2021-47126 7.8 HIGH ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions
CVE-2021-47124 7.8 HIGH io_uring: fix link timeout refs
CVE-2021-47112 7.8 HIGH x86/kvm: Teardown PV features on boot CPU as well
CVE-2021-47132 7.5 HIGH mptcp: fix sk_forward_memory corruption on retransmission
CVE-2021-47109 7.5 HIGH neighbour: allow NUD_NOARP entries to be forced GCed
CVE-2021-47130 7.5 HIGH nvmet: fix freeing unallocated p2pmem
CVE-2021-47113 7.1 HIGH btrfs: abort in rename_exchange if we fail to insert the second ref
CVE-2021-47127 ice: track AF_XDP ZC enabled queues in bitmap
CVE-2021-47110 x86/kvm: Disable kvmclock on all CPUs on shutdown
CVE-2021-47134 efi/fdt: fix panic when no valid fdt found
CVE-2021-47133 HID: amd_sfh: Fix memory leak in amd_sfh_work
CVE-2021-47128 bpf, lockdown, audit: Fix buggy SELinux lockdown permission checks
CVE-2021-47117 ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed
CVE-2021-47114 ocfs2: fix data corruption by fallocate
CVE-2021-47125 sch_htb: fix refcount leak in htb_parent_to_leaf_offload

Showing top 20 of 26 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47120

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