# CVE-2024-27053: linux: In the Linux kernel, the following vulnerability has been resolved:  wifi: wilc1000: fix RCU usage in connect path  W...

CVE-2024-27053 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-27053, released May 1, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2024-27053
- Priority: High
- CVSS: 8.8 (high)
- EPSS: 0.0165
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 1, 2024

## 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

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.85-1 | [DEBIAN-CVE-2024-27053](https://patchblox.com/security/data/fix/linux/debian-cve-2024-27053.md) | May 1, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.7.12-1 | [DEBIAN-CVE-2024-27053](https://patchblox.com/security/data/fix/linux/debian-cve-2024-27053.md) | May 1, 2024 |
| Linux | linux Debian 14 | 6.7.12-1 | [DEBIAN-CVE-2024-27053](https://patchblox.com/security/data/fix/linux/debian-cve-2024-27053.md) | May 1, 2024 |

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Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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