CVE-2024-35811

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Source
https://cve.org/CVERecord?id=CVE-2024-35811
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-35811.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-35811
Downstream
Related
Published
2024-05-17T13:23:17.508Z
Modified
2026-03-23T05:10:17.892718420Z
Summary
wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach
Details

In the Linux kernel, the following vulnerability has been resolved:

wifi: brcmfmac: Fix use-after-free bug in brcmfcfg80211detach

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:

->brcmfusbprobe ->brcmfusbprobecb ->brcmfattach ->brcmfbusstarted ->brcmfcfg80211attach ->wlinitpriv ->brcmfinitescan ->INITWORK(&cfg->escantimeoutwork, brcmfcfg80211escantimeout_worker);

If we disconnect the USB by hotplug, it will call brcmfusbdisconnect to make cleanup. The invoking chain is :

brcmfusbdisconnect ->brcmfusbdisconnectcb ->brcmfdetach ->brcmfcfg80211detach ->kfree(cfg);

While the timeout woker may still be running. This will cause a use-after-free bug on cfg in brcmfcfg80211escantimeoutworker.

Fix it by deleting the timer and canceling the worker in brcmfcfg80211detach.

[arend.vanspriel@broadcom.com: keep timer delete as is and cancel work just before free]

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/35xxx/CVE-2024-35811.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
e756af5b30b008f6ffcfebf8ad0b477f6f225b62
Fixed
202c503935042272e2f9e1bb549d5f69a8681169
Fixed
8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1
Fixed
bacb8c3ab86dcd760c15903fcee58169bc3026aa
Fixed
8c36205123dc57349b59b4f1a2301eb278cbc731
Fixed
0b812f706fd7090be74812101114a0e165b36744
Fixed
190794848e2b9d15de92d502b6ac652806904f5a
Fixed
6678a1e7d896c00030b31491690e8ddc9a90767a
Fixed
0a7591e14a8da794d0b93b5d1c6254ccb23adacb
Fixed
0f7352557a35ab7888bc7831411ec8a3cbe20d78

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-35811.json"