Kernel memory corruption via oversized WID string
Published Oct 4, 2025 · Updated Oct 4, 2025
Out-of-bounds write in the Linux wilc1000 driver allows physically proximate attackers to corrupt kernel memory via crafted Wi-Fi frames. wilc_wlan_parse_response_frame() trusts a firmware-supplied 16-bit WID string length and copies as many as 65,537 bytes into a roughly 512-byte configuration buffer without checking the element's recorded limit. Exploitation requires a system using WILC1000 wireless hardware within radio range, and the overflow can disclose memory, corrupt kernel objects, or crash the system.
Summary
What happened
Out-of-bounds write in the Linux wilc1000 driver allows physically proximate attackers to corrupt kernel memory via crafted Wi-Fi frames. wilc_wlan_parse_response_frame() trusts a firmware-supplied 16-bit WID string length and copies as many as 65,537 bytes into a roughly 512-byte configuration buffer without checking the element's recorded limit. Exploitation requires a system using WILC1000 wireless hardware within radio range, and the overflow can disclose memory, corrupt kernel objects, or crash the system.
The record
- CVE
- CVE-2025-39952
- Published
- Oct 4, 2025
- Updated
- Oct 4, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1203
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 4, 2025CVE publishedPublication date reported by the CVE source.
- Oct 4, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2203ef417044b10a8563ade6a17c74183745d72e
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6085291a1a5865d4ad70f0e5812d524ebd5d1711
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ae50f8562306a7ea1cf3c9722f97ee244f974729
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fe9e4d0c39311d0f97b024147a0d155333f388b5
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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