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Huawei EulerOS: CVE-2024-35811: kernel security update

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Huawei EulerOS: CVE-2024-35811: kernel security update

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
05/17/2024
Created
10/09/2024
Added
10/08/2024
Modified
01/28/2025

Description

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]

Solution(s)

  • huawei-euleros-2_0_sp9-upgrade-kernel
  • huawei-euleros-2_0_sp9-upgrade-kernel-tools
  • huawei-euleros-2_0_sp9-upgrade-kernel-tools-libs
  • huawei-euleros-2_0_sp9-upgrade-python3-perf

References

  • https://attackerkb.com/topics/cve-2024-35811
  • CVE - 2024-35811
  • EulerOS-SA-2024-2394
  • 查看数 698
  • 已创建
  • 最后回复

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