CVE-2021-47065— rtw88: Fix array overrun in rtw_get_tx_power_params()
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rtw_get_tx_power_params() 中存在数组溢出问题。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1203 · Exploitation for Client ExecutionAffected Version Matrix 12
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | fa6dfe6bff246ddd5be3cfe81637f137acd6c294< 6b5aa0cf321c25f41e09a61c83ee4dc7ab9549cb |
affected |
fa6dfe6bff246ddd5be3cfe81637f137acd6c294< 95fb153c6027924cda3422120169d1890737f3a0 |
affected | ||
fa6dfe6bff246ddd5be3cfe81637f137acd6c294< 5f3dbced8eaa5c9ed7d6943f3fea99f235a6516a |
affected | ||
fa6dfe6bff246ddd5be3cfe81637f137acd6c294< 9cd09722e18a08b6a3d68b8bccfac39ddc22434c |
affected | ||
fa6dfe6bff246ddd5be3cfe81637f137acd6c294< 2ff25985ea9ccc6c9af2c77b0b49045adcc62e0e |
affected | ||
5.3 |
affected | ||
< 5.3 |
unaffected | ||
5.4.119≤ 5.4.* |
unaffected | ||
| … +4 more rows | |||
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I. Basic Information for CVE-2021-47065
Vulnerability Information
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Vulnerability Title
rtw88: Fix array overrun in rtw_get_tx_power_params()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
rtw88: Fix array overrun in rtw_get_tx_power_params()
Using a kernel with the Undefined Behaviour Sanity Checker (UBSAN) enabled, the
following array overrun is logged:
================================================================================
UBSAN: array-index-out-of-bounds in /home/finger/wireless-drivers-next/drivers/net/wireless/realtek/rtw88/phy.c:1789:34
index 5 is out of range for type 'u8 [5]'
CPU: 2 PID: 84 Comm: kworker/u16:3 Tainted: G O 5.12.0-rc5-00086-gd88bba47038e-dirty #651
Hardware name: TOSHIBA TECRA A50-A/TECRA A50-A, BIOS Version 4.50 09/29/2014
Workqueue: phy0 ieee80211_scan_work [mac80211]
Call Trace:
dump_stack+0x64/0x7c
ubsan_epilogue+0x5/0x40
__ubsan_handle_out_of_bounds.cold+0x43/0x48
rtw_get_tx_power_params+0x83a/drivers/net/wireless/realtek/rtw88/0xad0 [rtw_core]
? rtw_pci_read16+0x20/0x20 [rtw_pci]
? check_hw_ready+0x50/0x90 [rtw_core]
rtw_phy_get_tx_power_index+0x4d/0xd0 [rtw_core]
rtw_phy_set_tx_power_level+0xee/0x1b0 [rtw_core]
rtw_set_channel+0xab/0x110 [rtw_core]
rtw_ops_config+0x87/0xc0 [rtw_core]
ieee80211_hw_config+0x9d/0x130 [mac80211]
ieee80211_scan_state_set_channel+0x81/0x170 [mac80211]
ieee80211_scan_work+0x19f/0x2a0 [mac80211]
process_one_work+0x1dd/0x3a0
worker_thread+0x49/0x330
? rescuer_thread+0x3a0/0x3a0
kthread+0x134/0x150
? kthread_create_worker_on_cpu+0x70/0x70
ret_from_fork+0x22/0x30
================================================================================
The statement where an array is being overrun is shown in the following snippet:
if (rate <= DESC_RATE11M)
tx_power = pwr_idx_2g->cck_base[group];
else
====> tx_power = pwr_idx_2g->bw40_base[group];
The associated arrays are defined in main.h as follows:
struct rtw_2g_txpwr_idx {
u8 cck_base[6];
u8 bw40_base[5];
struct rtw_2g_1s_pwr_idx_diff ht_1s_diff;
struct rtw_2g_ns_pwr_idx_diff ht_2s_diff;
struct rtw_2g_ns_pwr_idx_diff ht_3s_diff;
struct rtw_2g_ns_pwr_idx_diff ht_4s_diff;
};
The problem arises because the value of group is 5 for channel 14. The trivial
increase in the dimension of bw40_base fails as this struct must match the layout of
efuse. The fix is to add the rate as an argument to rtw_get_channel_group() and set
the group for channel 14 to 4 if rate <= DESC_RATE11M.
This patch fixes commit fa6dfe6bff24 ("rtw88: resolve order of tx power setting routines")
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rtw_get_tx_power_params() 中存在数组溢出问题。
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-2021-47065
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-47065 (5)
Same Patch Batch · Linux · 2024-02-29 · 53 CVEs total
| CVE-2023-52480 | 9.8 CRITICAL | ksmbd: fix race condition between session lookup and expire |
| CVE-2023-52478 | 8.8 HIGH | HID: logitech-hidpp: Fix kernel crash on receiver USB disconnect |
| CVE-2023-52479 | 8.8 HIGH | ksmbd: fix uaf in smb20_oplock_break_ack |
| CVE-2024-26620 | 8.2 HIGH | s390/vfio-ap: always filter entire AP matrix |
| CVE-2021-47068 | 7.8 HIGH | net/nfc: fix use-after-free llcp_sock_bind/connect |
| CVE-2023-52491 | 7.8 HIGH | media: mtk-jpeg: Fix use after free bug due to error path handling in mtk_jpeg_dec_device_ |
| CVE-2024-26608 | 7.8 HIGH | ksmbd: fix global oob in ksmbd_nl_policy |
| CVE-2023-52486 | 7.8 HIGH | drm: Don't unref the same fb many times by mistake due to deadlock handling |
| CVE-2024-26610 | 7.8 HIGH | wifi: iwlwifi: fix a memory corruption |
| CVE-2024-26614 | 7.8 HIGH | tcp: make sure init the accept_queue's spinlocks once |
| CVE-2024-26617 | 7.8 HIGH | fs/proc/task_mmu: move mmu notification mechanism inside mm lock |
| CVE-2023-52483 | 7.8 HIGH | mctp: perform route lookups under a RCU read-side lock |
| CVE-2021-47060 | 7.8 HIGH | KVM: Stop looking for coalesced MMIO zones if the bus is destroyed |
| CVE-2021-47061 | 7.8 HIGH | KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU |
| CVE-2024-26611 | 7.5 HIGH | xsk: fix usage of multi-buffer BPF helpers for ZC XDP |
| CVE-2021-47066 | 7.1 HIGH | async_xor: increase src_offs when dropping destination page |
| CVE-2021-47055 | 7.1 HIGH | mtd: require write permissions for locking and badblock ioctls |
| CVE-2023-52497 | 7.1 HIGH | erofs: fix lz4 inplace decompression |
| CVE-2021-47057 | crypto: sun8i-ss - Fix memory leak of object d when dma_iv fails to map | |
| CVE-2021-47058 | regmap: set debugfs_name to NULL after it is freed |
Showing top 20 of 53 CVEs. View all on vendor page → →
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V. Comments for CVE-2021-47065
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