CVE-2026-43176 (GCVE-0-2026-43176)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:27 – Updated: 2026-08-05 12:26
VLAI
Title
wifi: rtw89: pci: validate release report content before using for RTL8922DE
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: pci: validate release report content before using for RTL8922DE The commit 957eda596c76 ("wifi: rtw89: pci: validate sequence number of TX release report") does validation on existing chips, which somehow a release report of SKB becomes malformed. As no clear cause found, add rules ahead for RTL8922DE to avoid crash if it happens.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 110f3c11f440d78ef8a181f75456e24e428f69e4 , < ebeaa3b24ba568ff8505165f954dba15cc53e4b3 (git)
Affected: 110f3c11f440d78ef8a181f75456e24e428f69e4 , < 3e8a88b5e8b3506d9c5e031a65ba65ce9a0683a3 (git)
Affected: 110f3c11f440d78ef8a181f75456e24e428f69e4 , < 5f93d611b33a05bd03d6843c8efe8cb6a1992620 (git)
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Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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              "value": "AV:A - The vulnerable path is in a PCI WiFi driver\u2019s TX release-report handling, reached from device/firmware reports generated during wireless operation. A plausible attacker is an adjacent WiFi peer/AP/injector that can induce wireless traffic and repeated TX completions on affected RTL8922DE systems.\nAC:L - No race or special software privilege gate is required once the affected device is operating; the vulnerable report parser is reached through normal IRQ/NAPI processing. Although malformed reports are hardware/firmware-originated, repeated induced traffic makes low complexity the higher-severity defensible choice.\nPR:N - The path is entered from hardware interrupt/NAPI processing, not from an ioctl or privileged local API. An adjacent attacker does not need Linux credentials or kernel capabilities on the victim.\nUI:N - After the affected WiFi device is active, processing release reports requires no victim action at exploit time. The interrupt-driven reclaim path runs automatically.\nS:U - The impact is within the same host kernel/driver security authority. There is no VM escape, IOMMU bypass, or separate security scope crossed.\nC:H - The invalid TX channel can index outside or into unallocated `rtwpci-\u003etx.rings` entries before list/SKB operations, creating kernel memory corruption potential beyond a pure NULL dereference. Under the required uncertainty rule, this is scored as high confidentiality impact.\nI:H - The same unvalidated channel selection can drive list manipulation and cleanup on an invalid/uninitialized TX ring, which is memory corruption with potential control-flow or data integrity impact. Under the required uncertainty rule, this is scored as high integrity impact.\nA:H - The related release-report bug is documented to cause a kernel NULL pointer dereference/oops in this reclaim path, and this fix explicitly prevents crashes from malformed reports. A remotely induced kernel crash is high availability impact."
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.