Kernel panic via undersized socket-buffer headroom
Published Dec 9, 2025 · Updated Aug 5, 2026
Out-of-bounds write in the Linux kernel mt76 driver allows remote attackers to trigger a kernel panic via same-segment bridged Ethernet frames. mt7921_usb_sdio_tx_prepare_skb() prepends TX and SDIO headers without first ensuring that the socket buffer has adequate headroom. Reachability requires an MT7921 USB or SDIO interface bridged behind a receiving network device that supplies too little headroom; the write corrupts kernel memory and crashes the host.
Summary
What happened
Out-of-bounds write in the Linux kernel mt76 driver allows remote attackers to trigger a kernel panic via same-segment bridged Ethernet frames. mt7921_usb_sdio_tx_prepare_skb() prepends TX and SDIO headers without first ensuring that the socket buffer has adequate headroom. Reachability requires an MT7921 USB or SDIO interface bridged behind a receiving network device that supplies too little headroom; the write corrupts kernel memory and crashes the host.
The record
- CVE
- CVE-2023-53785
- Published
- Dec 9, 2025
- Updated
- Aug 5, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1499.004
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 9, 2025CVE publishedPublication date reported by the CVE source.
- Aug 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5.12
- Affected versionversion=e0f9fdda81bd32371ddac9222487e612027d8de2 <414c0c04703423b78bc9dea1aa6493334dc61f6e
- Affected versionversion=e0f9fdda81bd32371ddac9222487e612027d8de2 <5c8bbb79c7cbca65534badf360f3b1145759c7bc
- Affected versionversion=e0f9fdda81bd32371ddac9222487e612027d8de2 <98c4d0abf5c478db1ad126ff0c187dbb84c0803c
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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