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Vulnerability record · CVE-2026-43113 · published 6 May 2026

CVE-2026-43113: Linux kernel null pointer dereference vulnerability

Linux · Linux Kernel

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.

8.8 CVSS 3.1 High EPSS 0.41% · top 67.1% CWE-476 · NULL pointer dereference
8.8CVSS 3.1 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-43113), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.