CVE-2026-43213

System crash via unchecked TX release sequence

Published May 6, 2026 · Updated May 6, 2026

Null pointer dereference in the Linux kernel rtw89 PCI Wi-Fi driver allows physically proximate attackers to crash affected systems. An invalid rpp_info.seq from a TX release report indexes wd_ring->pages without a bounds check in rtw89_pci_release_tx. Exposure requires an active affected rtw89 PCI Wi-Fi interface; radio traffic can stimulate TX completions, but the rare malformed report is not directly controllable by physically proximate attackers.

CVSS severity7.5
High
EPSS probability0.22%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in the Linux kernel rtw89 PCI Wi-Fi driver allows physically proximate attackers to crash affected systems. An invalid rpp_info.seq from a TX release report indexes wd_ring->pages without a bounds check in rtw89_pci_release_tx. Exposure requires an active affected rtw89 PCI Wi-Fi interface; radio traffic can stimulate TX completions, but the rare malformed report is not directly controllable by physically proximate attackers.

The record

CVE
CVE-2026-43213
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <957eda596c7665f2966970fd1dcc35fe299b38e8
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b342dd13aedccb0dd27365f6cc63a262f42394ce
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ef7fa19809b2d892d45da53f90ac698d13c367fd

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <957eda596c7665f2966970fd1dcc35fe299b38e8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b342dd13aedccb0dd27365f6cc63a262f42394ce; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ef7fa19809b2d892d45da53f90ac698d13c367fd

Published CVSS scores

7.5Linux kernel.orgCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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