CVE-2026-89598: fbdev: ssd1307fb: defer I2C transfers from damage callbacks
fbdev: ssd1307fb: defer I2C transfers from damage callbacks
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.12.111-1 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 7.2.6-1 - Upgrade
Upgrade
debian/linux-6.12to a version that resolves this vulnerability.Fixed in 6.12.111-1~deb12u1 - Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 6.1.191 - Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 6.6.157 - Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 6.12.109 - Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 6.18.50 - Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 7.2.4 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1 - Upgrade
Upgrade
debian/linux-6.12to a version that resolves this vulnerability.Fixed in 6.12.113-1~deb12u1 - Upgrade
Upgrade
ubuntu/linux-hwe-7.0to a version that resolves this vulnerability.Fixed in 7.0.0-42.42~24.04.1 - Upgrade
Upgrade
ubuntu/linux-riscv-7.0to a version that resolves this vulnerability.Fixed in 7.0.0-42.42.1~24.04.1 - Upgrade
Upgrade
ubuntu/linuxto a version that resolves this vulnerability.Fixed in 7.0.0-42.42 - Upgrade
Upgrade
ubuntu/linux-awsto a version that resolves this vulnerability.Fixed in 7.0.0-1016.17 - Upgrade
Upgrade
ubuntu/linux-gcpto a version that resolves this vulnerability.Fixed in 7.0.0-1016.18 - Upgrade
Upgrade
ubuntu/linux-ibmto a version that resolves this vulnerability.Fixed in 7.0.0-1017.17 - Upgrade
Upgrade
ubuntu/linux-oem-7.0to a version that resolves this vulnerability.Fixed in 7.0.0-1017.17 - Upgrade
Upgrade
ubuntu/linux-oracleto a version that resolves this vulnerability.Fixed in 7.0.0-1015.16 - Upgrade
Upgrade
ubuntu/linux-riscvto a version that resolves this vulnerability.Fixed in 7.0.0-42.42.1
Event History
Frequently Asked Questions
Which systems are exposed to this issue?
Systems using the Linux kernel ssd1307fb framebuffer driver are exposed when fbdev damage callbacks update the display over I2C. The reported failure occurred on an RK3566 system, but the issue is described in the driver’s callback and I2C transfer behavior rather than as specific to that platform.
What condition triggers the failure?
The failure can occur when fbcon invokes an fbdev damage callback while printk has disabled preemption. The driver then performs a synchronous, sleeping I2C transfer from atomic context, resulting in a "scheduling while atomic" bug.
How can I identify an affected system?
Kernel logs may contain a "BUG: scheduling while atomic" report associated with display updates, along with a stack or module list showing ssd1307fb. The supplied report also includes a watchdog message indicating that watchdog0 did not stop.
What is the remediation?
Apply a kernel update containing the fix that defers I2C transfers out of damage callbacks. The provided stable kernel references identify commits carrying the resolution.