What’s Vulnerable › Vulnerabilities

CVE-2026-43113: wifi: wl1251: validate packet IDs before indexing tx_frames

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-06 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: wl1251: validate packet IDs before indexing tx_frames wl1251_tx_packet_cb() uses the firmware completion ID directly to index the fixed 16-entry wl->tx_frames[] array. The ID is a raw u8 from the completion block, and the callback does not currently verify that it fits the array before dereferencing it. Reject completion IDs that fall outside wl->tx_frames[] and keep the existing NULL check in the same guard. This keeps the fix local to the trust boundary and avoids touching the rest of the completion flow.

Affected products

• Linux kernel: from 2.6.31 before 6.6.136; from 6.7 before 6.12.83; from 6.13 before 6.18.24; from 6.19 before 6.19.14; 7.0-rc1, 7.0-rc2, 7.0-rc3, 7.0-rc4, 7.0-rc5, 7.0-rc6 — fixed in 6.12.83, 6.18.24, 6.19.14, 6.6.136

How to fix

Upgrade to a fixed version: Linux kernel 6.12.83, 6.18.24, 6.19.14, 6.6.136. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0fd56fad9c56356e7fa7a7c52e7ecbf807a44eb0
• https://git.kernel.org/stable/c/26ee518695c484f75e3606d631278e84bd24ae02
• https://git.kernel.org/stable/c/6509dbece7339dbc8980c706b9d623119a6de105
• https://git.kernel.org/stable/c/8d7465be5163a923ee5d7459719ef5a021c1584a
• https://git.kernel.org/stable/c/a8a11a876f0a97061ee5d9e61d0f5a0df7e241c7
• https://git.kernel.org/stable/c/b6ba1eacf276063ebeefbbae8056043c24f2efaf
• https://git.kernel.org/stable/c/df15adc692a802636dd3f258fc7cca8bf7a0ed9a
• https://git.kernel.org/stable/c/e0dc1ad870d6788b049bfe1511ac75b2333a7550

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