CVE-2022-49112

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Source
https://cve.org/CVERecord?id=CVE-2022-49112
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49112.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-49112
Downstream
Related
Published
2025-02-26T01:54:57.109Z
Modified
2026-03-12T03:24:36.855335Z
Summary
mt76: fix monitor mode crash with sdio driver
Details

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

mt76: fix monitor mode crash with sdio driver

mt7921s driver may receive frames with fragment buffers. If there is a CTS packet received in monitor mode, the payload is 10 bytes only and need 6 bytes header padding after RXD buffer. However, only RXD in the first linear buffer, if we pull buffer size RXD-size+6 bytes with skbpull(), that would trigger "BUGON(skb->len < skb->data_len)" in _skbpull().

To avoid the nonlinear buffer issue, enlarge the RXD size from 128 to 256 to make sure all MCU operation in linear buffer.

[ 52.007562] kernel BUG at include/linux/skbuff.h:2313! [ 52.007578] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP [ 52.007987] pc : skbpull+0x48/0x4c [ 52.008015] lr : mt7921queuerxskb+0x494/0x890 [mt7921common] [ 52.008361] Call trace: [ 52.008377] skbpull+0x48/0x4c [ 52.008400] mt76snetworker+0x134/0x1b0 [mt76_sdio 35339a92c6eb7d4bbcc806a1d22f56365565135c] [ 52.008431] __mt76workerfn+0xe8/0x170 [mt76 ef716597d11a77150bc07e3fdd68eeb0f9b56917] [ 52.008449] kthread+0x148/0x3ac [ 52.008466] retfromfork+0x10/0x30

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49112.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
7bc04215a66b60e198aecaee8418f6d79fa19faa
Fixed
13946d5a68efd11dd6af2f6ef4c908f6b00158a5
Fixed
c37b4cab3d97ef64b206fca4d9daabd9aff7356e
Fixed
95e2af01669c7a3cb7a933cefa06361f9db15059
Fixed
123bc712b1de0805f9d683687e17b1ec2aba0b68

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49112.json"