Vulnerability in Linux

[ Description ]Official 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].

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund14 Oct 2026WID-SEC-2026-3951

  Linux Kernel: Multiple vulnerabilities Translated from German

  CVE-2026-98426CVE-2026-98416CVE-2026-98393+43 more CVEs

[ References ]References

• git.kernel.org/stable/c/03d5e4776e8b71c2468c5c3c48b39202c87a8796
• git.kernel.org/stable/c/0969c9688389f2e0f65b1a924b0dd6625a3bb776
• git.kernel.org/stable/c/11bc2cbb14f450eaa47cce9eb086f948ef8f4bcd
• git.kernel.org/stable/c/1a60cb2292194cc9eafae7ca8a8a72d37ae78d97
• git.kernel.org/stable/c/2761b21cb896b1da8dd46cee5084c9032b2d7098
• git.kernel.org/stable/c/5fd4cc87e6cc0839aac89c24ebe39ce262fe088f
• git.kernel.org/stable/c/a3d722190cdef18da4878b5efc27c3c386dda248
• git.kernel.org/stable/c/fcac5813f324cd07dfd36b4adf624fc70f7587d6