CVE-2026-80678: Linux kernel · i2c: imx: Fix slave registration race and error handling
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 8.4 High.
Data as of 28 Oct 2026, 01:00 UTC
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 28 Aug 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: i2c: imx: Fix slave registration race and error handling In i2c_imx_reg_slave(), the slave pointer was assigned before pm_runtime_resume_and_get(). If pm_runtime_resume_and_get() failed, the error path returned without clearing i2c_imx->slave, leaving it non-NULL and causing all subsequent registration attempts to fail with -EBUSY. Additionally, because this driver uses a shared IRQ, the interrupt handler i2c_imx_isr() can execute concurrently and, after acquiring slave_lock, dereference i2c_imx->slave. The previous fix attempt added a lockless i2c_imx->slave = NULL on the error path, but that could race with the ISR under the lock and still cause a NULL pointer dereference. Fix both issues by deferring the assignment of i2c_imx->slave and i2c_imx->last_slave_event to after a successful resume, and by performing the assignment inside the slave_lock critical section. This guarantees that the slave pointer is never left stale on the error path and is always valid when observed by the interrupt handler.
References
- ubuntu.com/security/CVE-2026-80678 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-80678 (opens in a new tab)
- git.kernel.org/linus/d64ec362c369bbc33833f7936d5f3a706b0d5c45 (opens in a new tab)
- git.kernel.org/stable/c/12a4f0950a158d98552cbaeacc35edccd8d975fa (opens in a new tab)
- git.kernel.org/stable/c/614ca6594e301ff682999797c2216e9685558a2b (opens in a new tab)
- git.kernel.org/stable/c/754bc62f72fd64b202462367134ac8ce95b005de (opens in a new tab)
- git.kernel.org/stable/c/b9f6f4883b9ac86654e75899d0dbf8a7a96ad5d8 (opens in a new tab)
- git.kernel.org/stable/c/cfdf6e13518589f911b7eace6ccb788e4ed87397 (opens in a new tab)
- git.kernel.org/stable/c/d64ec362c369bbc33833f7936d5f3a706b0d5c45 (opens in a new tab)
- git.kernel.org/stable/c/d6748f6802f3eebafaa16a5e5dcfbfb9b3bc173f (opens in a new tab)