CVE-2026-43213

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

wifi: rtw89: pci: validate sequence number of TX release report

Hardware rarely reports abnormal sequence number in TX release report,

which will access out-of-bounds of wd_ring->pages array, causing NULL

pointer dereference.

BUG: kernel NULL pointer dereference, address: 0000000000000000

#PF: supervisor read access in kernel mode

#PF: error_code(0x0000) - not-present page

PGD 0 P4D 0

Oops: 0000 [#1] PREEMPT SMP NOPTI

CPU: 1 PID: 1085 Comm: irq/129-rtw89_p Tainted: G S U

6.1.145-17510-g2f3369c91536 #1 (HASH:69e8 1)

Call Trace:

<IRQ>

rtw89_pci_release_tx+0x18f/0x300 [rtw89_pci (HASH:4c83 2)]

rtw89_pci_napi_poll+0xc2/0x190 [rtw89_pci (HASH:4c83 2)]

net_rx_action+0xfc/0x460 net/core/dev.c:6578 net/core/dev.c:6645 net/core/dev.c:6759

handle_softirqs+0xbe/0x290 kernel/softirq.c:601

? rtw89_pci_interrupt_threadfn+0xc5/0x350 [rtw89_pci (HASH:4c83 2)]

__local_bh_enable_ip+0x

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References