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]
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c"
],
"versions": [
{
"version": "e756af5b30b0",
"lessThan": "202c50393504",
"status": "affected",
"versionType": "git"
},
{
"version": "e756af5b30b0",
"lessThan": "8e3f03f4ef7c",
"status": "affected",
"versionType": "git"
},
{
"version": "e756af5b30b0",
"lessThan": "bacb8c3ab86d",
"status": "affected",
"versionType": "git"
},
{
"version": "e756af5b30b0",
"lessThan": "8c36205123dc",
"status": "affected",
"versionType": "git"
},
{
"version": "e756af5b30b0",
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"versionType": "git"
},
{
"version": "e756af5b30b0",
"lessThan": "190794848e2b",
"status": "affected",
"versionType": "git"
},
{
"version": "e756af5b30b0",
"lessThan": "6678a1e7d896",
"status": "affected",
"versionType": "git"
},
{
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"lessThan": "0a7591e14a8d",
"status": "affected",
"versionType": "git"
},
{
"version": "e756af5b30b0",
"lessThan": "0f7352557a35",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c"
],
"versions": [
{
"version": "3.7",
"status": "affected"
},
{
"version": "0",
"lessThan": "3.7",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "4.19.312",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.4.274",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.10.215",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.15.154",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.1.84",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.6.24",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.7.12",
"lessThanOrEqual": "6.7.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.8.3",
"lessThanOrEqual": "6.8.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.9",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]
git.kernel.org/stable/c/0a7591e14a8da794d0b93b5d1c6254ccb23adacb
git.kernel.org/stable/c/0b812f706fd7090be74812101114a0e165b36744
git.kernel.org/stable/c/0f7352557a35ab7888bc7831411ec8a3cbe20d78
git.kernel.org/stable/c/190794848e2b9d15de92d502b6ac652806904f5a
git.kernel.org/stable/c/202c503935042272e2f9e1bb549d5f69a8681169
git.kernel.org/stable/c/6678a1e7d896c00030b31491690e8ddc9a90767a
git.kernel.org/stable/c/8c36205123dc57349b59b4f1a2301eb278cbc731
git.kernel.org/stable/c/8e3f03f4ef7c36091f46e7349096efb5a2cdb3a1
git.kernel.org/stable/c/bacb8c3ab86dcd760c15903fcee58169bc3026aa
lists.debian.org/debian-lts-announce/2024/06/msg00017.html
lists.debian.org/debian-lts-announce/2024/06/msg00020.html