CVE-2026-98426

IRQ leakage via mismatched cleanup context

Published Oct 14, 2026 · Updated Oct 14, 2026

IRQ leakage in Linux's mwifiex PCIe driver allows attackers to leave handlers registered via failed MSI-X initialization. The mwifiex_pcie_request_irq() cleanup loop passes the failed vector's context to free_irq() instead of each registered vector's context, preventing handler removal and generating warnings. The path requires affected hardware using MSI-X and a request_irq() failure after an earlier registration succeeds; no attacker-controlled trigger or resulting crash is documented.

CVSS severityUnavailable
Unscored
EPSS probability0.22%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IRQ leakage in Linux's mwifiex PCIe driver allows attackers to leave handlers registered via failed MSI-X initialization. The mwifiex_pcie_request_irq() cleanup loop passes the failed vector's context to free_irq() instead of each registered vector's context, preventing handler removal and generating warnings. The path requires affected hardware using MSI-X and a request_irq() failure after an earlier registration succeeds; no attacker-controlled trigger or resulting crash is documented.

The record

CVE
CVE-2026-98426
Published
Oct 14, 2026
Updated
Oct 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=4.6
  2. Affected versionversion=99074fc1e67b374b5c72406a23ac01fed806d634 <03d5e4776e8b71c2468c5c3c48b39202c87a8796
  3. Affected versionversion=99074fc1e67b374b5c72406a23ac01fed806d634 <0969c9688389f2e0f65b1a924b0dd6625a3bb776
  4. Affected versionversion=99074fc1e67b374b5c72406a23ac01fed806d634 <11bc2cbb14f450eaa47cce9eb086f948ef8f4bcd
  5. Affected versionversion=99074fc1e67b374b5c72406a23ac01fed806d634 <1a60cb2292194cc9eafae7ca8a8a72d37ae78d97
  6. Affected versionversion=99074fc1e67b374b5c72406a23ac01fed806d634 <2761b21cb896b1da8dd46cee5084c9032b2d7098
  7. Affected versionversion=99074fc1e67b374b5c72406a23ac01fed806d634 <5fd4cc87e6cc0839aac89c24ebe39ce262fe088f
  8. Affected versionversion=99074fc1e67b374b5c72406a23ac01fed806d634 <a3d722190cdef18da4878b5efc27c3c386dda248
  9. Affected versionversion=99074fc1e67b374b5c72406a23ac01fed806d634 <fcac5813f324cd07dfd36b4adf624fc70f7587d6

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.6; version=99074fc1e67b374b5c72406a23ac01fed806d634 <03d5e4776e8b71c2468c5c3c48b39202c87a8796; version=99074fc1e67b374b5c72406a23ac01fed806d634 <0969c9688389f2e0f65b1a924b0dd6625a3bb776; version=99074fc1e67b374b5c72406a23ac01fed806d634 <11bc2cbb14f450eaa47cce9eb086f948ef8f4bcd; version=99074fc1e67b374b5c72406a23ac01fed806d634 <1a60cb2292194cc9eafae7ca8a8a72d37ae78d97; version=99074fc1e67b374b5c72406a23ac01fed806d634 <2761b21cb896b1da8dd46cee5084c9032b2d7098; version=99074fc1e67b374b5c72406a23ac01fed806d634 <5fd4cc87e6cc0839aac89c24ebe39ce262fe088f; version=99074fc1e67b374b5c72406a23ac01fed806d634 <a3d722190cdef18da4878b5efc27c3c386dda248; version=99074fc1e67b374b5c72406a23ac01fed806d634 <fcac5813f324cd07dfd36b4adf624fc70f7587d6

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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