Vulnerability in Linux

[ Description ]Official description

In the Linux kernel, the following vulnerability has been resolved: mmc: core: Cancel SDIO IRQ work before freeing host A host controller that uses sdio_signal_irq() schedules host->sdio_irq_work from its interrupt handler. That work is only cancelled on the suspend path (mmc_sdio_suspend()), not on the remove/free path, so a worker armed just before the controller freed its IRQ can run after mmc_host_classdev_release() has freed the host and dereference it through container_of(). Cancel host->sdio_irq_work in mmc_free_host(), like the existing host->detect drain added by commit 1036f69e2513 ("mmc: core: Cancel delayed work before releasing host"). This issue was found by an in-house static analysis tool.

[ 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-Bund5 Oct 2026WID-SEC-2026-3743

  Linux Kernel: Multiple vulnerabilities Translated from German

  Risk mediumCVE-2026-98221CVE-2026-98181CVE-2026-98248+204 more CVEs

[ References ]References

• git.kernel.org/stable/c/0bf3d168a2cc20b120d6b50f0a8ac5b40ff4d589
• git.kernel.org/stable/c/1d6e7315ee1c992b4ca42c9b11c5ed0e925a00e0
• git.kernel.org/stable/c/2a863458828ade0671c2bc2e469bbd7f2340eb03
• git.kernel.org/stable/c/4553b5004eca9c9eae29a421f1a9c4d5db2c9114
• git.kernel.org/stable/c/6feadbecdae60a6324c967f3b1493741083793a3
• git.kernel.org/stable/c/bae1cf4f9902b2065bd78b759c7fe6312855f05e