CVE-2022-48876
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-48876
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-48876.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-48876
- Downstream
- Published
- 2024-08-21T06:10:07Z
- Modified
- 2025-10-21T08:03:50.931301Z
- Summary
- wifi: mac80211: fix initialization of rx->link and rx->link_sta
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: fix initialization of rx->link and rx->link_sta
There are some codepaths that do not initialize rx->linksta properly. This causes a crash in places which assume that rx->linksta is valid if rx->sta is valid. One known instance is triggered by _ieee80211rxhamsdu being called from fast-rx. It results in a crash like this one:
BUG: kernel NULL pointer dereference, address: 00000000000000a8 #PF: supervisor write access in kernel mode #PF: errorcode(0x0002) - not-present page PGD 0 P4D 0 Oops: 0002 [#1] PREEMPT SMP PTI CPU: 1 PID: 506 Comm: mt76-usb-rx phy Tainted: G E 6.1.0-debian64x+1.7 #3 Hardware name: ZOTAC ZBOX-ID92/ZBOX-IQ01/ZBOX-ID92/ZBOX-IQ01, BIOS B220P007 05/21/2014 RIP: 0010:ieee80211deliverskb+0x62/0x1f0 [mac80211] Code: 00 48 89 04 24 e8 9e a7 c3 df 89 c0 48 03 1c c5 a0 ea 39 a1 4c 01 6b 08 48 ff 03 48 83 7d 28 00 74 11 48 8b 45 30 48 63 55 44 <48> 83 84 d0 a8 00 00 00 01 41 8b 86 c0 11 00 00 8d 50 fd 83 fa 01 RSP: 0018:ffff999040803b10 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffffb9903f496480 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff999040803ce0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8d21828ac900 R13: 000000000000004a R14: ffff8d2198ed89c0 R15: ffff8d2198ed8000 FS: 0000000000000000(0000) GS:ffff8d24afe80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000000a8 CR3: 0000000429810002 CR4: 00000000001706e0 Call Trace: <TASK> _ieee80211rxhamsdu+0x1b5/0x240 [mac80211] ? ieee80211prepareandrxhandle+0xcdd/0x1320 [mac80211] ? _localbhenableip+0x3b/0xa0 ieee80211prepareandrxhandle+0xcdd/0x1320 [mac80211] ? preparetransfer+0x109/0x1a0 [xhcihcd] ieee80211rxlist+0xa80/0xda0 [mac80211] mt76rxcomplete+0x207/0x2e0 [mt76] mt76rxpollcomplete+0x357/0x5a0 [mt76] mt76urxworker+0x4f5/0x600 [mt76usb] ? mt76getminavgrssi+0x140/0x140 [mt76] _mt76workerfn+0x50/0x80 [mt76] kthread+0xed/0x120 ? kthreadcompleteandexit+0x20/0x20 retfrom_fork+0x22/0x30
Since the initialization of rx->link and rx->link_sta is rather convoluted and duplicated in many places, clean it up by using a helper function to set it.
[remove unnecessary rx->sta->sta.mlo check]
- 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
-
Introducedccdde7c74ffd7e8bdd3cf685bbfa41231c8e3131Fixeda57c981d9f24d2bd89eaa76dc477e8ca252e22e8
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedccdde7c74ffd7e8bdd3cf685bbfa41231c8e3131Fixede66b7920aa5ac5b1a1997a454004ba9246a3c005
Affected versions
v5.*
v5.19
v6.*
v6.0
v6.0-rc1
v6.0-rc2
v6.0-rc3
v6.0-rc4
v6.0-rc5
v6.0-rc6
v6.0-rc7
v6.1
v6.1-rc1
v6.1-rc2
v6.1-rc3
v6.1-rc4
v6.1-rc5
v6.1-rc6
v6.1-rc7
v6.1-rc8
v6.1.1
v6.1.2
v6.1.3
v6.1.4
v6.1.5
v6.1.6
v6.1.7
v6.2-rc1
v6.2-rc2
Database specific
vanir_signatures
[
{
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},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@e66b7920aa5ac5b1a1997a454004ba9246a3c005",
"signature_version": "v1",
"deprecated": false,
"target": {
"function": "ieee80211_invoke_fast_rx",
"file": "net/mac80211/rx.c"
},
"id": "CVE-2022-48876-0a7f1211",
"signature_type": "Function"
},
{
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"deprecated": false,
"target": {
"function": "ieee80211_prepare_and_rx_handle",
"file": "net/mac80211/rx.c"
},
"id": "CVE-2022-48876-22a24ea8",
"signature_type": "Function"
},
{
"digest": {
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"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a57c981d9f24d2bd89eaa76dc477e8ca252e22e8",
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"deprecated": false,
"target": {
"function": "ieee80211_mark_rx_ba_filtered_frames",
"file": "net/mac80211/rx.c"
},
"id": "CVE-2022-48876-4ea46b07",
"signature_type": "Function"
},
{
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"signature_version": "v1",
"deprecated": false,
"target": {
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"file": "net/mac80211/rx.c"
},
"id": "CVE-2022-48876-5d181c81",
"signature_type": "Function"
},
{
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"id": "CVE-2022-48876-6c2dd73e",
"signature_type": "Line"
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{
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