CVE-2026-98213: Linux kernel · mmc: core: Cancel SDIO IRQ work before freeing host
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 28 Oct 2026, 01:27 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 6 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: 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.
References
- ubuntu.com/security/CVE-2026-98213 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98213 (opens in a new tab)
- git.kernel.org/linus/6feadbecdae60a6324c967f3b1493741083793a3 (opens in a new tab)
- git.kernel.org/stable/c/0bf3d168a2cc20b120d6b50f0a8ac5b40ff4d589 (opens in a new tab)
- git.kernel.org/stable/c/1d6e7315ee1c992b4ca42c9b11c5ed0e925a00e0 (opens in a new tab)
- git.kernel.org/stable/c/2a863458828ade0671c2bc2e469bbd7f2340eb03 (opens in a new tab)
- git.kernel.org/stable/c/4553b5004eca9c9eae29a421f1a9c4d5db2c9114 (opens in a new tab)
- git.kernel.org/stable/c/6feadbecdae60a6324c967f3b1493741083793a3 (opens in a new tab)
- git.kernel.org/stable/c/bae1cf4f9902b2065bd78b759c7fe6312855f05e (opens in a new tab)