Vulnerability Database

356,688

Total vulnerabilities in the database

CVE-2026-43213 — linux / linux_kernel

NULL Pointer Dereference

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+0xeb/0x120 kernel/softirq.c:499 kernel/softirq.c:423 </IRQ> <TASK> rtw89_pci_interrupt_threadfn+0xf8/0x350 [rtw89_pci (HASH:4c83 2)] ? irq_thread+0xa7/0x340 kernel/irq/manage.c:0 irq_thread+0x177/0x340 kernel/irq/manage.c:1205 kernel/irq/manage.c:1314 ? thaw_kernel_threads+0xb0/0xb0 kernel/irq/manage.c:1202 ? irq_forced_thread_fn+0x80/0x80 kernel/irq/manage.c:1220 kthread+0xea/0x110 kernel/kthread.c:376 ? synchronize_irq+0x1a0/0x1a0 kernel/irq/manage.c:1287 ? kthread_associate_blkcg+0x80/0x80 kernel/kthread.c:331 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK>

To prevent crash, validate rpp_info.seq before using.

  • Published: May 6, 2026
  • Updated: May 9, 2026
  • CVE: CVE-2026-43213
  • Severity: High
  • Exploit:
  • CISA KEV:

CVSS v3:

  • Severity: High
  • Score: 7.5
  • AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWEs:

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

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Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

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