CVE-2024-27053
wifi: wilc1000: fix RCU usage in connect path
Reported by linux · Published May 1, 2024
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
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| linux_kernel | linux | 6.8, 6.2, 5.16, 5.5, 205c50306acf |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | c460495ee072fc01a9b1e8d72c179510418cafac, c460495ee072fc01a9b1e8d72c179510418cafac, c460495ee072fc01a9b1e8d72c179510418cafac |
| Linux | Linux | 5.1, 0, 5.4.273 |
| linux | linux_kernel | *, *, * |
| Linux | Linux | *, 6.1.83, 6.6.23 |
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | 0 |
| linux | linux_kernel | 5.1, 5.1, 5.1 |
Timeline
- May 1, 2024 CVE Published
- May 2, 2024 EPSS Score (30 in total, the first dated here)
- Oct 4, 2024 Coalition ESS Score (14 in total, the first dated here)
- Jan 15, 2026 Security Advisory (319 in total, the first dated here)
- Mar 30, 2026 Distribution Patch (281 in total, the first dated here)
- Oct 12, 2026 CVE Updated
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