Tracker / CVE-2024-35811
CVE-2024-35811
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach This is the candidate patch of CVE-2023-47233 : https://nvd.nist.gov/vuln/detail/CVE-2023-47233 In brcm80211 driver,it starts with the following invoking chain to start init a timeout worker: ->brcmf_usb_probe ->brcmf_usb_probe_cb ->brcmf_attach ->brcmf_bus_started ->brcmf_cfg80211_attach ->wl_init_priv ->brcmf_init_escan ->INIT_WORK(&cfg->escan_timeout_work, brcmf_cfg80211_escan_timeout_worker); If we disconnect the USB by hotplug, it will call brcmf_usb_disconnect to make cleanup. The invoking chain is : brcmf_usb_disconnect ->brcmf_usb_disconnect_cb ->brcmf_detach ->brcmf_cfg80211_detach ->kfree(cfg); While the timeout woker may still be running. This will cause a use-after-free bug on cfg in brcmf_cfg80211_escan_timeout_worker. Fix it by deleting the timer and canceling the worker in brcmf_cfg80211_detach. [[email protected]: keep timer delete as is and cancel work just before free]
Prodotti e versioni affette
| debian | debian_linux |
|---|---|
| linux | linux_kernel · 3.7 → 4.19.312 |
| linux | linux_kernel · 4.20 → 5.4.274 |
| linux | linux_kernel · 5.11 → 5.15.154 |
| linux | linux_kernel · 5.16 → 6.1.84 |
| linux | linux_kernel · 5.5 → 5.10.215 |
| linux | linux_kernel · 6.2 → 6.6.24 |
| linux | linux_kernel · 6.7 → 6.7.12 |
| linux | linux_kernel · 6.8 → 6.8.3 |