{"id":"CVE-2022-49112","title":"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","summary":"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 i…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 4.16, < 5.15.34","linux_kernel >= 5.16, < 5.16.20","linux_kernel >= 5.17, < 5.17.3"],"patched":["linux_kernel 5.17.3"],"published":"2025-02-26","updated":"2026-08-13","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2022-49112","references":[{"url":"https://git.kernel.org/stable/c/123bc712b1de0805f9d683687e17b1ec2aba0b68","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/95e2af01669c7a3cb7a933cefa06361f9db15059","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c37b4cab3d97ef64b206fca4d9daabd9aff7356e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00243,"epssPercentile":0.15818,"ingestedAt":"2026-08-13T00:57:22.414Z","slug":"CVE-2022-49112","body":"## Overview\n\nIn 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->len < skb->data_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\n\n## Affected\n\n- `linux_kernel >= 4.16, < 5.15.34`\n- `linux_kernel >= 5.16, < 5.16.20`\n- `linux_kernel >= 5.17, < 5.17.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 5.17.3`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}