ghsa-c4cx-cwgc-922p
Vulnerability from github
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 skb_pull(), that would trigger "BUG_ON(skb->len < skb->data_len)" in __skb_pull().
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 : skb_pull+0x48/0x4c [ 52.008015] lr : mt7921_queue_rx_skb+0x494/0x890 [mt7921_common] [ 52.008361] Call trace: [ 52.008377] skb_pull+0x48/0x4c [ 52.008400] mt76s_net_worker+0x134/0x1b0 [mt76_sdio 35339a92c6eb7d4bbcc806a1d22f56365565135c] [ 52.008431] __mt76_worker_fn+0xe8/0x170 [mt76 ef716597d11a77150bc07e3fdd68eeb0f9b56917] [ 52.008449] kthread+0x148/0x3ac [ 52.008466] ret_from_fork+0x10/0x30
{
"affected": [],
"aliases": [
"CVE-2022-49112"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-26T07:00:48Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmt76: fix monitor mode crash with sdio driver\n\nmt7921s driver may receive frames with fragment buffers. If there is a\nCTS packet received in monitor mode, the payload is 10 bytes only and\nneed 6 bytes header padding after RXD buffer. However, only RXD in the\nfirst linear buffer, if we pull buffer size RXD-size+6 bytes with\nskb_pull(), that would trigger \"BUG_ON(skb-\u003elen \u003c skb-\u003edata_len)\" in\n__skb_pull().\n\nTo avoid the nonlinear buffer issue, enlarge the RXD size from 128 to\n256 to make sure all MCU operation in linear buffer.\n\n[ 52.007562] kernel BUG at include/linux/skbuff.h:2313!\n[ 52.007578] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP\n[ 52.007987] pc : skb_pull+0x48/0x4c\n[ 52.008015] lr : mt7921_queue_rx_skb+0x494/0x890 [mt7921_common]\n[ 52.008361] Call trace:\n[ 52.008377] skb_pull+0x48/0x4c\n[ 52.008400] mt76s_net_worker+0x134/0x1b0 [mt76_sdio 35339a92c6eb7d4bbcc806a1d22f56365565135c]\n[ 52.008431] __mt76_worker_fn+0xe8/0x170 [mt76 ef716597d11a77150bc07e3fdd68eeb0f9b56917]\n[ 52.008449] kthread+0x148/0x3ac\n[ 52.008466] ret_from_fork+0x10/0x30",
"id": "GHSA-c4cx-cwgc-922p",
"modified": "2025-10-14T21:30:25Z",
"published": "2025-10-14T21:30:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49112"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/123bc712b1de0805f9d683687e17b1ec2aba0b68"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/13946d5a68efd11dd6af2f6ef4c908f6b00158a5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/95e2af01669c7a3cb7a933cefa06361f9db15059"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c37b4cab3d97ef64b206fca4d9daabd9aff7356e"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
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