CVE-2026-89994

Summary

In the Linux kernel, the following vulnerability has been resolved:

dmaengine: fsl-edma: tracing: no ptr dereference during log output

The fsl edma events store a pointer to a struct fsl_edma_engine in the ringbuffer and dereference it when a log entry is printed. At this time, the pointer may no longer be valid.

Event injection can be used to trigger a crash:

$ cd /sys/kernel/tracing $ echo 'value = 0' > events/fsl_edma/edma_writeb/inject $ cat trace

The log output needs only edma->membase. Add a membase field at the end of the event and use the new field for log output. Keep the existing fields for backward compatibility.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux11102d0c343ba06ddd303f2503c0ce46d70052f2 < ef02cd3807f39ae1dbc924788d8fa6a85334c435affected
LinuxLinux11102d0c343ba06ddd303f2503c0ce46d70052f2 < d382aaf5fed38c6dd2e0cc710d97cb81d660ffa7affected
LinuxLinux11102d0c343ba06ddd303f2503c0ce46d70052f2 < 2a3801ae5c344473e648006c5b03a9216ac54a6aaffected
LinuxLinux11102d0c343ba06ddd303f2503c0ce46d70052f2 < 2ea04dca8e627f722caa7a2037cfbae0257f3501affected
LinuxLinux6.10affected
LinuxLinux0 < 6.10unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.51 <= 6.18.*unaffected
LinuxLinux7.2.5 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References