CVE-2026-98426: Linux kernel · wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 28 Oct 2026, 01:28 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 14 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path mwifiex_pcie_request_irq() registers each MSI-X vector with a per-index dev_id (&card->msix_ctx[i]). On a request_irq() failure the cleanup loop "for (j = 0; j < i; j++)" frees msix_entries[j].vector but passes the failed index's &card->msix_ctx[i] as the dev_id. free_irq() matches on (irq, dev_id), so it fails to find the action registered with &card->msix_ctx[j]: the already-requested IRQ j is not freed (leaked) and free_irq() warns about freeing a non-existent IRQ. Use &card->msix_ctx[j].
References
- ubuntu.com/security/CVE-2026-98426 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98426 (opens in a new tab)
- git.kernel.org/stable/c/a3d722190cdef18da4878b5efc27c3c386dda248 (opens in a new tab)
- git.kernel.org/stable/c/11bc2cbb14f450eaa47cce9eb086f948ef8f4bcd (opens in a new tab)
- git.kernel.org/stable/c/03d5e4776e8b71c2468c5c3c48b39202c87a8796 (opens in a new tab)
- git.kernel.org/stable/c/1a60cb2292194cc9eafae7ca8a8a72d37ae78d97 (opens in a new tab)
- git.kernel.org/stable/c/0969c9688389f2e0f65b1a924b0dd6625a3bb776 (opens in a new tab)
- git.kernel.org/stable/c/5fd4cc87e6cc0839aac89c24ebe39ce262fe088f (opens in a new tab)
- git.kernel.org/stable/c/fcac5813f324cd07dfd36b4adf624fc70f7587d6 (opens in a new tab)
- git.kernel.org/stable/c/2761b21cb896b1da8dd46cee5084c9032b2d7098 (opens in a new tab)