4.3 Medium
CVSS3
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.1 Medium
AI Score
Confidence
Low
0.0004 Low
EPSS
Percentile
13.1%
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]
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | all | linux | < 6.1.85-1 | linux_6.1.85-1_all.deb |
Debian | 11 | all | linux | < 5.10.216-1 | linux_5.10.216-1_all.deb |
Debian | 10 | all | linux | <= 4.19.249-2 | linux_4.19.249-2_all.deb |
Debian | 999 | all | linux | < 6.7.12-1 | linux_6.7.12-1_all.deb |
Debian | 13 | all | linux | < 6.7.12-1 | linux_6.7.12-1_all.deb |
4.3 Medium
CVSS3
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:P/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.1 Medium
AI Score
Confidence
Low
0.0004 Low
EPSS
Percentile
13.1%