Kernel-memory disclosure via unchecked firmware response length
Published Aug 15, 2026 · Updated Aug 15, 2026
Out-of-bounds read in the Linux mt7925 Wi-Fi testmode code allows local users to receive kernel memory after a short firmware response. mt7925_tm_query() copies 512 bytes from offset 8 of the response skb without first confirming that the buffer contains 520 bytes, and mt7925_testmode_dump() returns the copied data to userspace. Reachability requires mt7925 hardware, access to the local testmode interface, and firmware that supplies a short response; the documented consequence is kernel-memory disclosure.
Summary
What happened
Out-of-bounds read in the Linux mt7925 Wi-Fi testmode code allows local users to receive kernel memory after a short firmware response. mt7925_tm_query() copies 512 bytes from offset 8 of the response skb without first confirming that the buffer contains 520 bytes, and mt7925_testmode_dump() returns the copied data to userspace. Reachability requires mt7925 hardware, access to the local testmode interface, and firmware that supplies a short response; the documented consequence is kernel-memory disclosure.
The record
- CVE
- CVE-2026-74324
- Published
- Aug 15, 2026
- Updated
- Aug 15, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 15, 2026CVE publishedPublication date reported by the CVE source.
- Aug 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
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- Affected versionversion=6.7
- Affected versionversion=c948b5da6bbec742b433138e3e3f9537a85af2e5 <c386e90a7ce8ddec9f038e9437661a2821b0ce89
- Affected versionversion=c948b5da6bbec742b433138e3e3f9537a85af2e5 <c7369a00860a0704461d440e7c3bf9b49bfdbaee
- Affected versionversion=c948b5da6bbec742b433138e3e3f9537a85af2e5 <e8b214b6d6e1902025452db0a0af73dc9693e4ba
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Attacks
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