In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: Avoid potential use-after-free in hci_error_reset
While handling the HCI_EV_HARDWARE_ERROR event, if the underlying
BT controller is not responding, the GPIO reset mechanism would
free the hci_dev and lead to a use-after-free in hci_error_reset.
Here’s the call trace observed on a ChromeOS device with Intel AX201:
queue_work_on+0x3e/0x6c
__hci_cmd_sync_sk+0x2ee/0x4c0 [bluetooth <HASH:3b4a6>]
? init_wait_entry+0x31/0x31
__hci_cmd_sync+0x16/0x20 [bluetooth <HASH:3b4a 6>]
hci_error_reset+0x4f/0xa4 [bluetooth <HASH:3b4a 6>]
process_one_work+0x1d8/0x33f
worker_thread+0x21b/0x373
kthread+0x13a/0x152
? pr_cont_work+0x54/0x54
? kthread_blkcg+0x31/0x31
ret_from_fork+0x1f/0x30
This patch holds the reference count on the hci_dev while processing
a HCI_EV_HARDWARE_ERROR event to avoid potential crash.
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/bluetooth/hci_core.c"
],
"versions": [
{
"version": "c7741d16a57c",
"lessThan": "e0b278650f07",
"status": "affected",
"versionType": "git"
},
{
"version": "c7741d16a57c",
"lessThan": "98fb98fd37e4",
"status": "affected",
"versionType": "git"
},
{
"version": "c7741d16a57c",
"lessThan": "6dd0a9dfa99f",
"status": "affected",
"versionType": "git"
},
{
"version": "c7741d16a57c",
"lessThan": "da4569d450b1",
"status": "affected",
"versionType": "git"
},
{
"version": "c7741d16a57c",
"lessThan": "45085686b955",
"status": "affected",
"versionType": "git"
},
{
"version": "c7741d16a57c",
"lessThan": "2ab9a19d896f",
"status": "affected",
"versionType": "git"
},
{
"version": "c7741d16a57c",
"lessThan": "dd594cdc24f2",
"status": "affected",
"versionType": "git"
},
{
"version": "c7741d16a57c",
"lessThan": "2449007d3f73",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/bluetooth/hci_core.c"
],
"versions": [
{
"version": "4.0",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.0",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "4.19.309",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.4.271",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.10.212",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.15.151",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.1.81",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.6.21",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.7.9",
"lessThanOrEqual": "6.7.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.8",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]
git.kernel.org/stable/c/2449007d3f73b2842c9734f45f0aadb522daf592
git.kernel.org/stable/c/2ab9a19d896f5a0dd386e1f001c5309bc35f433b
git.kernel.org/stable/c/45085686b9559bfbe3a4f41d3d695a520668f5e1
git.kernel.org/stable/c/6dd0a9dfa99f8990a08eb8fdd8e79bee31c7d8e2
git.kernel.org/stable/c/98fb98fd37e42fd4ce13ff657ea64503e24b6090
git.kernel.org/stable/c/da4569d450b193e39e87119fd316c0291b585d14
git.kernel.org/stable/c/dd594cdc24f2e48dab441732e6dfcafd6b0711d1
git.kernel.org/stable/c/e0b278650f07acf2e0932149183458468a731c03
lists.debian.org/debian-lts-announce/2024/06/msg00017.html
lists.debian.org/debian-lts-announce/2024/06/msg00020.html