mt76: fix monitor mode crash with sdio driver
Summary
| CVE | CVE-2022-49112 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-02-26 07:00:48 UTC |
| Updated | 2026-08-13 00:17:28 UTC |
| Description | 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 |
Risk And Classification
Primary CVSS: v3.1 5.5 MEDIUM from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Problem Types: NVD-CWE-noinfo
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 48fab5bbef4092d925ab3214773ad12e68807223 c37b4cab3d97ef64b206fca4d9daabd9aff7356e git | Not specified |
| CNA | Linux | Linux | affected 48fab5bbef4092d925ab3214773ad12e68807223 95e2af01669c7a3cb7a933cefa06361f9db15059 git | Not specified |
| CNA | Linux | Linux | affected 48fab5bbef4092d925ab3214773ad12e68807223 123bc712b1de0805f9d683687e17b1ec2aba0b68 git | Not specified |
| CNA | Linux | Linux | affected 5.16 | Not specified |
| CNA | Linux | Linux | unaffected 5.16 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.16.20 5.16.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.17.3 5.17.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.18 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/95e2af01669c7a3cb7a933cefa06361f9db15059 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/123bc712b1de0805f9d683687e17b1ec2aba0b68 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/c37b4cab3d97ef64b206fca4d9daabd9aff7356e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.