CVE-2021-47122— net: caif: fix memory leak in caif_device_notify
Possible ATT&CK Techniques 1AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 7c18d2205ea76eef9674e59e1ecae4f332a53e9e< b042e2b2039565eb8f0eb51c14fbe1ef463c8cd8 | affected |
7c18d2205ea76eef9674e59e1ecae4f332a53e9e< 9348c1f10932f13b299cbc8b1bd5f780751fae49 | affected | ||
7c18d2205ea76eef9674e59e1ecae4f332a53e9e< 4bca2034b41c15b62d47a19158bb76235fd4455d | affected | ||
7c18d2205ea76eef9674e59e1ecae4f332a53e9e< 3be863c11cab725add9fef4237ed4e232c3fc3bb | affected | ||
7c18d2205ea76eef9674e59e1ecae4f332a53e9e< f52f4fd67264c70cd0b4ba326962ebe12d9cba94 | affected | ||
7c18d2205ea76eef9674e59e1ecae4f332a53e9e< af2806345a37313f01b1c9f15e046745b8ee2daa | affected | ||
7c18d2205ea76eef9674e59e1ecae4f332a53e9e< 6a0e317f61094d377335547e015dd2ff12caf893 | affected | ||
7c18d2205ea76eef9674e59e1ecae4f332a53e9e< b53558a950a89824938e9811eddfc8efcd94e1bb | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2021-47122
Vulnerability Information
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Vulnerability Title
net: caif: fix memory leak in caif_device_notify
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: caif: fix memory leak in caif_device_notify In case of caif_enroll_dev() fail, allocated link_support won't be assigned to the corresponding structure. So simply free allocated pointer in case of error
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 net 模块的 caif_device_notify 方法中存在内存泄漏。
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-2021-47122
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
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Other References for CVE-2021-47122 (8)
Same Patch Batch · Linux · 2024-03-15 · 26 CVEs total
| CVE-2021-47123 | io_uring: fix ltout double free on completion race | |
| CVE-2021-47135 | mt76: mt7921: fix possible AOOB issue in mt7921_mcu_tx_rate_report | |
| 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-2021-47132 | mptcp: fix sk_forward_memory corruption on retransmission | |
| CVE-2021-47131 | net/tls: Fix use-after-free after the TLS device goes down and up | |
| CVE-2021-47130 | nvmet: fix freeing unallocated p2pmem | |
| CVE-2021-47129 | netfilter: nft_ct: skip expectations for confirmed conntrack | |
| CVE-2021-47128 | bpf, lockdown, audit: Fix buggy SELinux lockdown permission checks | |
| CVE-2021-47127 | ice: track AF_XDP ZC enabled queues in bitmap | |
| CVE-2021-47126 | ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions | |
| CVE-2021-47125 | sch_htb: fix refcount leak in htb_parent_to_leaf_offload | |
| CVE-2021-47124 | io_uring: fix link timeout refs | |
| CVE-2021-47109 | neighbour: allow NUD_NOARP entries to be forced GCed | |
| CVE-2021-47121 | net: caif: fix memory leak in cfusbl_device_notify | |
| CVE-2021-47120 | HID: magicmouse: fix NULL-deref on disconnect | |
| CVE-2021-47119 | ext4: fix memory leak in ext4_fill_super | |
| CVE-2021-47118 | pid: take a reference when initializing `cad_pid` | |
| CVE-2021-47117 | ext4: fix bug on in ext4_es_cache_extent as ext4_split_extent_at failed | |
| CVE-2021-47116 | ext4: fix memory leak in ext4_mb_init_backend on error path. |
Showing top 20 of 26 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-64600
xfs: resample the data fork mapping after cycling ILOCK - CVE-2026-64206
Bluetooth: L2CAP: cancel pending_rx_work before taking conn- - CVE-2026-64207
net/sched: dualpi2: fix GSO backlog accounting - CVE-2026-64205
i2c: i801: fix hardware state machine corruption in error pa - CVE-2026-64192
bpf: Reject BPF_MAP_TYPE_INODE_STORAGE creation if BPF LSM i
Same vendor: Linux
- CVE-2026-64600
xfs: resample the data fork mapping after cycling ILOCK - CVE-2026-64206
Bluetooth: L2CAP: cancel pending_rx_work before taking conn- - CVE-2026-64207
net/sched: dualpi2: fix GSO backlog accounting - CVE-2026-64205
i2c: i801: fix hardware state machine corruption in error pa - CVE-2026-64192
bpf: Reject BPF_MAP_TYPE_INODE_STORAGE creation if BPF LSM i
V. Comments for CVE-2021-47122
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