# CVE-2022-49112: linux: In the Linux kernel, the following vulnerability has been resolved:  mt76: fix monitor mode crash with sdio driver  m...

CVE-2022-49112 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49112, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49112
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## 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

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.17.3-1 | [DEBIAN-CVE-2022-49112](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49112.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.17.3-1 | [DEBIAN-CVE-2022-49112](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49112.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.17.3-1 | [DEBIAN-CVE-2022-49112](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49112.md) | Feb 26, 2025 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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